LED drivers: place I2C addresses into an array (#22975)

40 files changed, 1170 insertions, 1242 deletions

diff --git a/drivers/led/issi/is31fl3731-mono.c b/drivers/led/issi/is31fl3731-mono.c
index ca4e3449b2..0ffc87765d 100644
--- a/drivers/led/issi/is31fl3731-mono.c
+++ b/drivers/led/issi/is31fl3731-mono.c
@@ -32,6 +32,19 @@
 #    define IS31FL3731_I2C_PERSISTENCE 0
 #endif
 
+const uint8_t i2c_addresses[IS31FL3731_DRIVER_COUNT] = {
+    IS31FL3731_I2C_ADDRESS_1,
+#ifdef IS31FL3731_I2C_ADDRESS_2
+    IS31FL3731_I2C_ADDRESS_2,
+#    ifdef IS31FL3731_I2C_ADDRESS_3
+    IS31FL3731_I2C_ADDRESS_3,
+#        ifdef IS31FL3731_I2C_ADDRESS_4
+    IS31FL3731_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3731 PWM registers 0x24-0xB3.
 // Storing them like this is optimal for I2C transfers to the registers.
 // We could optimize this and take out the unused registers from these
@@ -43,21 +56,21 @@ bool    g_pwm_buffer_update_required[IS31FL3731_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[IS31FL3731_DRIVER_COUNT][IS31FL3731_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[IS31FL3731_DRIVER_COUNT]                        = {false};
 
-void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3731_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3731_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3731_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3731_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3731_select_page(uint8_t addr, uint8_t page) {
-    is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, page);
+void is31fl3731_select_page(uint8_t index, uint8_t page) {
+    is31fl3731_write_register(index, IS31FL3731_REG_COMMAND, page);
 }
 
-void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3731_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 9 transfers of 16 bytes.
 
@@ -65,10 +78,10 @@ void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i += 16) {
 #if IS31FL3731_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3731_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT);
 #endif
     }
 }
@@ -76,83 +89,69 @@ void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3731_init_drivers(void) {
     i2c_init();
 
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_1);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_2);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_3);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
+        is31fl3731_init(i);
+    }
 
     for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
         is31fl3731_set_led_control_register(i, true);
     }
 
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
+        is31fl3731_update_led_control_registers(i);
+    }
 }
 
-void is31fl3731_init(uint8_t addr) {
+void is31fl3731_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, first enable software shutdown,
     // then set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION);
+    is31fl3731_select_page(index, IS31FL3731_COMMAND_FUNCTION);
 
     // enable software shutdown
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00);
 #ifdef IS31FL3731_DEGHOST // set to enable de-ghosting of the array
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION, IS31FL3731_GHOST_IMAGE_PREVENTION_GEN);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION, IS31FL3731_GHOST_IMAGE_PREVENTION_GEN);
 #endif
 
     // this delay was copied from other drivers, might not be needed
     wait_ms(10);
 
     // picture mode
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_CONFIG, IS31FL3731_CONFIG_MODE_PICTURE);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_CONFIG, IS31FL3731_CONFIG_MODE_PICTURE);
     // display frame 0
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY, 0x00);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY, 0x00);
     // audio sync off
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00);
 
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1);
+    is31fl3731_select_page(index, IS31FL3731_COMMAND_FRAME_1);
 
     // turn off all LEDs in the LED control register
     for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3731_write_register(addr, IS31FL3731_FRAME_REG_LED_CONTROL + i, 0x00);
+        is31fl3731_write_register(index, IS31FL3731_FRAME_REG_LED_CONTROL + i, 0x00);
     }
 
     // turn off all LEDs in the blink control register (not really needed)
     for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3731_write_register(addr, IS31FL3731_FRAME_REG_BLINK_CONTROL + i, 0x00);
+        is31fl3731_write_register(index, IS31FL3731_FRAME_REG_BLINK_CONTROL + i, 0x00);
     }
 
     // set PWM on all LEDs to 0
     for (uint8_t i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i++) {
-        is31fl3731_write_register(addr, IS31FL3731_FRAME_REG_PWM + i, 0x00);
+        is31fl3731_write_register(index, IS31FL3731_FRAME_REG_PWM + i, 0x00);
     }
 
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION);
+    is31fl3731_select_page(index, IS31FL3731_COMMAND_FUNCTION);
 
     // disable software shutdown
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01);
 
     // select page 0 and leave it selected.
     // most usage after initialization is just writing PWM buffers in page 0
     // as there's not much point in double-buffering
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1);
+    is31fl3731_select_page(index, IS31FL3731_COMMAND_FRAME_1);
 }
 
 void is31fl3731_set_value(int index, uint8_t value) {
@@ -192,18 +191,18 @@ void is31fl3731_set_led_control_register(uint8_t index, bool value) {
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3731_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3731_write_pwm_buffer(addr, index);
+        is31fl3731_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3731_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
         for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3731_write_register(addr, i, g_led_control_registers[index][i]);
+            is31fl3731_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -211,14 +210,7 @@ void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3731_flush(void) {
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
+        is31fl3731_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3731-mono.h b/drivers/led/issi/is31fl3731-mono.h
index 1b205e0115..e6e107d309 100644
--- a/drivers/led/issi/is31fl3731-mono.h
+++ b/drivers/led/issi/is31fl3731-mono.h
@@ -105,9 +105,9 @@ typedef struct is31fl3731_led_t {
 extern const is31fl3731_led_t PROGMEM g_is31fl3731_leds[IS31FL3731_LED_COUNT];
 
 void is31fl3731_init_drivers(void);
-void is31fl3731_init(uint8_t addr);
-void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3731_select_page(uint8_t addr, uint8_t page);
+void is31fl3731_init(uint8_t index);
+void is31fl3731_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3731_select_page(uint8_t index, uint8_t page);
 
 void is31fl3731_set_value(int index, uint8_t value);
 void is31fl3731_set_value_all(uint8_t value);
@@ -118,8 +118,8 @@ void is31fl3731_set_led_control_register(uint8_t index, bool value);
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3731_update_pwm_buffers(uint8_t index);
+void is31fl3731_update_led_control_registers(uint8_t index);
 
 void is31fl3731_flush(void);
 
diff --git a/drivers/led/issi/is31fl3731.c b/drivers/led/issi/is31fl3731.c
index 07f8194c0b..bb6f7e4028 100644
--- a/drivers/led/issi/is31fl3731.c
+++ b/drivers/led/issi/is31fl3731.c
@@ -31,6 +31,19 @@
 #    define IS31FL3731_I2C_PERSISTENCE 0
 #endif
 
+const uint8_t i2c_addresses[IS31FL3731_DRIVER_COUNT] = {
+    IS31FL3731_I2C_ADDRESS_1,
+#ifdef IS31FL3731_I2C_ADDRESS_2
+    IS31FL3731_I2C_ADDRESS_2,
+#    ifdef IS31FL3731_I2C_ADDRESS_3
+    IS31FL3731_I2C_ADDRESS_3,
+#        ifdef IS31FL3731_I2C_ADDRESS_4
+    IS31FL3731_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3731 PWM registers 0x24-0xB3.
 // Storing them like this is optimal for I2C transfers to the registers.
 // We could optimize this and take out the unused registers from these
@@ -42,21 +55,21 @@ bool    g_pwm_buffer_update_required[IS31FL3731_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[IS31FL3731_DRIVER_COUNT][IS31FL3731_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[IS31FL3731_DRIVER_COUNT]                        = {false};
 
-void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3731_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3731_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3731_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3731_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3731_select_page(uint8_t addr, uint8_t page) {
-    is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, page);
+void is31fl3731_select_page(uint8_t index, uint8_t page) {
+    is31fl3731_write_register(index, IS31FL3731_REG_COMMAND, page);
 }
 
-void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3731_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 9 transfers of 16 bytes.
 
@@ -64,10 +77,10 @@ void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i += 16) {
 #if IS31FL3731_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3731_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, g_pwm_buffer[index] + i, 16, IS31FL3731_I2C_TIMEOUT);
 #endif
     }
 }
@@ -75,83 +88,69 @@ void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3731_init_drivers(void) {
     i2c_init();
 
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_1);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_2);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_3);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
+        is31fl3731_init(i);
+    }
 
     for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
         is31fl3731_set_led_control_register(i, true, true, true);
     }
 
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
+        is31fl3731_update_led_control_registers(i);
+    }
 }
 
-void is31fl3731_init(uint8_t addr) {
+void is31fl3731_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, first enable software shutdown,
     // then set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION);
+    is31fl3731_select_page(index, IS31FL3731_COMMAND_FUNCTION);
 
     // enable software shutdown
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00);
 #ifdef IS31FL3731_DEGHOST // set to enable de-ghosting of the array
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION, IS31FL3731_GHOST_IMAGE_PREVENTION_GEN);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION, IS31FL3731_GHOST_IMAGE_PREVENTION_GEN);
 #endif
 
     // this delay was copied from other drivers, might not be needed
     wait_ms(10);
 
     // picture mode
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_CONFIG, IS31FL3731_CONFIG_MODE_PICTURE);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_CONFIG, IS31FL3731_CONFIG_MODE_PICTURE);
     // display frame 0
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY, 0x00);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY, 0x00);
     // audio sync off
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00);
 
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1);
+    is31fl3731_select_page(index, IS31FL3731_COMMAND_FRAME_1);
 
     // turn off all LEDs in the LED control register
     for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3731_write_register(addr, IS31FL3731_FRAME_REG_LED_CONTROL + i, 0x00);
+        is31fl3731_write_register(index, IS31FL3731_FRAME_REG_LED_CONTROL + i, 0x00);
     }
 
     // turn off all LEDs in the blink control register (not really needed)
     for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3731_write_register(addr, IS31FL3731_FRAME_REG_BLINK_CONTROL + i, 0x00);
+        is31fl3731_write_register(index, IS31FL3731_FRAME_REG_BLINK_CONTROL + i, 0x00);
     }
 
     // set PWM on all LEDs to 0
     for (uint8_t i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i++) {
-        is31fl3731_write_register(addr, IS31FL3731_FRAME_REG_PWM + i, 0x00);
+        is31fl3731_write_register(index, IS31FL3731_FRAME_REG_PWM + i, 0x00);
     }
 
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION);
+    is31fl3731_select_page(index, IS31FL3731_COMMAND_FUNCTION);
 
     // disable software shutdown
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01);
+    is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01);
 
     // select page 0 and leave it selected.
     // most usage after initialization is just writing PWM buffers in page 0
     // as there's not much point in double-buffering
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1);
+    is31fl3731_select_page(index, IS31FL3731_COMMAND_FRAME_1);
 }
 
 void is31fl3731_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
@@ -207,18 +206,18 @@ void is31fl3731_set_led_control_register(uint8_t index, bool red, bool green, bo
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3731_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3731_write_pwm_buffer(addr, index);
+        is31fl3731_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3731_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
         for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3731_write_register(addr, i, g_led_control_registers[index][i]);
+            is31fl3731_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -226,14 +225,7 @@ void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3731_flush(void) {
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
+        is31fl3731_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3731.h b/drivers/led/issi/is31fl3731.h
index 71cf38db4d..dc229c876d 100644
--- a/drivers/led/issi/is31fl3731.h
+++ b/drivers/led/issi/is31fl3731.h
@@ -106,9 +106,9 @@ typedef struct is31fl3731_led_t {
 extern const is31fl3731_led_t PROGMEM g_is31fl3731_leds[IS31FL3731_LED_COUNT];
 
 void is31fl3731_init_drivers(void);
-void is31fl3731_init(uint8_t addr);
-void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3731_select_page(uint8_t addr, uint8_t page);
+void is31fl3731_init(uint8_t index);
+void is31fl3731_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3731_select_page(uint8_t index, uint8_t page);
 
 void is31fl3731_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3731_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
@@ -119,8 +119,8 @@ void is31fl3731_set_led_control_register(uint8_t index, bool red, bool green, bo
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3731_update_pwm_buffers(uint8_t index);
+void is31fl3731_update_led_control_registers(uint8_t index);
 
 void is31fl3731_flush(void);
 
diff --git a/drivers/led/issi/is31fl3733-mono.c b/drivers/led/issi/is31fl3733-mono.c
index fe8419e2bc..bbe799bc90 100644
--- a/drivers/led/issi/is31fl3733-mono.c
+++ b/drivers/led/issi/is31fl3733-mono.c
@@ -62,6 +62,32 @@
 #    define IS31FL3733_SYNC_4 IS31FL3733_SYNC_NONE
 #endif
 
+const uint8_t i2c_addresses[IS31FL3733_DRIVER_COUNT] = {
+    IS31FL3733_I2C_ADDRESS_1,
+#ifdef IS31FL3733_I2C_ADDRESS_2
+    IS31FL3733_I2C_ADDRESS_2,
+#    ifdef IS31FL3733_I2C_ADDRESS_3
+    IS31FL3733_I2C_ADDRESS_3,
+#        ifdef IS31FL3733_I2C_ADDRESS_4
+    IS31FL3733_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
+const uint8_t driver_sync[IS31FL3733_DRIVER_COUNT] = {
+    IS31FL3733_SYNC_1,
+#ifdef IS31FL3733_I2C_ADDRESS_2
+    IS31FL3733_SYNC_2,
+#    ifdef IS31FL3733_I2C_ADDRESS_3
+    IS31FL3733_SYNC_3,
+#        ifdef IS31FL3733_I2C_ADDRESS_4
+    IS31FL3733_SYNC_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3733 PWM registers.
 // The control buffers match the page 0 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -74,22 +100,22 @@ bool    g_pwm_buffer_update_required[IS31FL3733_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[IS31FL3733_DRIVER_COUNT][IS31FL3733_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[IS31FL3733_DRIVER_COUNT]                        = {false};
 
-void is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3733_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3733_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3733_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3733_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3733_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3733_select_page(uint8_t addr, uint8_t page) {
-    is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, page);
+void is31fl3733_select_page(uint8_t index, uint8_t page) {
+    is31fl3733_write_register(index, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3733_write_register(index, IS31FL3733_REG_COMMAND, page);
 }
 
-void is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3733_write_pwm_buffer(uint8_t index) {
     // Assumes page 1 is already selected.
     // Transmit PWM registers in 12 transfers of 16 bytes.
 
@@ -97,10 +123,10 @@ void is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i += 16) {
 #if IS31FL3733_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3733_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT);
 #endif
     }
 }
@@ -108,65 +134,52 @@ void is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3733_init_drivers(void) {
     i2c_init();
 
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_1, IS31FL3733_SYNC_1);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_2, IS31FL3733_SYNC_2);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_3, IS31FL3733_SYNC_3);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_4, IS31FL3733_SYNC_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3733_DRIVER_COUNT; i++) {
+        is31fl3733_init(i);
+    }
 
     for (int i = 0; i < IS31FL3733_LED_COUNT; i++) {
         is31fl3733_set_led_control_register(i, true);
     }
 
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3733_DRIVER_COUNT; i++) {
+        is31fl3733_update_led_control_registers(i);
+    }
 }
 
-void is31fl3733_init(uint8_t addr, uint8_t sync) {
+void is31fl3733_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
-    // Sync is passed so set it according to the datasheet.
 
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL);
+    is31fl3733_select_page(index, IS31FL3733_COMMAND_LED_CONTROL);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3733_write_register(addr, i, 0x00);
+        is31fl3733_write_register(index, i, 0x00);
     }
 
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM);
+    is31fl3733_select_page(index, IS31FL3733_COMMAND_PWM);
 
     // Set PWM on all LEDs to 0
     // No need to setup Breath registers to PWM as that is the default.
     for (uint8_t i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i++) {
-        is31fl3733_write_register(addr, i, 0x00);
+        is31fl3733_write_register(index, i, 0x00);
     }
 
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_FUNCTION);
+    is31fl3733_select_page(index, IS31FL3733_COMMAND_FUNCTION);
+
+    uint8_t sync = driver_sync[index];
 
     // Set de-ghost pull-up resistors (SWx)
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_SW_PULLUP, IS31FL3733_SW_PULLUP);
+    is31fl3733_write_register(index, IS31FL3733_FUNCTION_REG_SW_PULLUP, IS31FL3733_SW_PULLUP);
     // Set de-ghost pull-down resistors (CSx)
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_CS_PULLDOWN, IS31FL3733_CS_PULLDOWN);
+    is31fl3733_write_register(index, IS31FL3733_FUNCTION_REG_CS_PULLDOWN, IS31FL3733_CS_PULLDOWN);
     // Set global current to maximum.
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3733_GLOBAL_CURRENT);
+    is31fl3733_write_register(index, IS31FL3733_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3733_GLOBAL_CURRENT);
     // Disable software shutdown.
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_CONFIGURATION, ((sync & 0b11) << 6) | ((IS31FL3733_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+    is31fl3733_write_register(index, IS31FL3733_FUNCTION_REG_CONFIGURATION, ((sync & 0b11) << 6) | ((IS31FL3733_PWM_FREQUENCY & 0b111) << 3) | 0x01);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -209,22 +222,22 @@ void is31fl3733_set_led_control_register(uint8_t index, bool value) {
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3733_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM);
+        is31fl3733_select_page(index, IS31FL3733_COMMAND_PWM);
 
-        is31fl3733_write_pwm_buffer(addr, index);
+        is31fl3733_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3733_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
-        is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL);
+        is31fl3733_select_page(index, IS31FL3733_COMMAND_LED_CONTROL);
 
         for (uint8_t i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3733_write_register(addr, i, g_led_control_registers[index][i]);
+            is31fl3733_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -232,14 +245,7 @@ void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3733_flush(void) {
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3733_DRIVER_COUNT; i++) {
+        is31fl3733_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3733-mono.h b/drivers/led/issi/is31fl3733-mono.h
index 591fca907a..1e88e49ed5 100644
--- a/drivers/led/issi/is31fl3733-mono.h
+++ b/drivers/led/issi/is31fl3733-mono.h
@@ -115,9 +115,9 @@ typedef struct is31fl3733_led_t {
 extern const is31fl3733_led_t PROGMEM g_is31fl3733_leds[IS31FL3733_LED_COUNT];
 
 void is31fl3733_init_drivers(void);
-void is31fl3733_init(uint8_t addr, uint8_t sync);
-void is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3733_select_page(uint8_t addr, uint8_t page);
+void is31fl3733_init(uint8_t index);
+void is31fl3733_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3733_select_page(uint8_t index, uint8_t page);
 
 void is31fl3733_set_value(int index, uint8_t value);
 void is31fl3733_set_value_all(uint8_t value);
@@ -128,8 +128,8 @@ void is31fl3733_set_led_control_register(uint8_t index, bool value);
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3733_update_pwm_buffers(uint8_t index);
+void is31fl3733_update_led_control_registers(uint8_t index);
 
 void is31fl3733_flush(void);
 
diff --git a/drivers/led/issi/is31fl3733.c b/drivers/led/issi/is31fl3733.c
index a54b9c90ba..9637746d22 100644
--- a/drivers/led/issi/is31fl3733.c
+++ b/drivers/led/issi/is31fl3733.c
@@ -61,6 +61,32 @@
 #    define IS31FL3733_SYNC_4 IS31FL3733_SYNC_NONE
 #endif
 
+const uint8_t i2c_addresses[IS31FL3733_DRIVER_COUNT] = {
+    IS31FL3733_I2C_ADDRESS_1,
+#ifdef IS31FL3733_I2C_ADDRESS_2
+    IS31FL3733_I2C_ADDRESS_2,
+#    ifdef IS31FL3733_I2C_ADDRESS_3
+    IS31FL3733_I2C_ADDRESS_3,
+#        ifdef IS31FL3733_I2C_ADDRESS_4
+    IS31FL3733_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
+const uint8_t driver_sync[IS31FL3733_DRIVER_COUNT] = {
+    IS31FL3733_SYNC_1,
+#ifdef IS31FL3733_I2C_ADDRESS_2
+    IS31FL3733_SYNC_2,
+#    ifdef IS31FL3733_I2C_ADDRESS_3
+    IS31FL3733_SYNC_3,
+#        ifdef IS31FL3733_I2C_ADDRESS_4
+    IS31FL3733_SYNC_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3733 PWM registers.
 // The control buffers match the page 0 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -73,22 +99,22 @@ bool    g_pwm_buffer_update_required[IS31FL3733_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[IS31FL3733_DRIVER_COUNT][IS31FL3733_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[IS31FL3733_DRIVER_COUNT]                        = {false};
 
-void is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3733_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3733_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3733_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3733_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3733_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3733_select_page(uint8_t addr, uint8_t page) {
-    is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, page);
+void is31fl3733_select_page(uint8_t index, uint8_t page) {
+    is31fl3733_write_register(index, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3733_write_register(index, IS31FL3733_REG_COMMAND, page);
 }
 
-void is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3733_write_pwm_buffer(uint8_t index) {
     // Assumes page 1 is already selected.
     // Transmit PWM registers in 12 transfers of 16 bytes.
 
@@ -96,10 +122,10 @@ void is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i += 16) {
 #if IS31FL3733_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3733_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3733_I2C_TIMEOUT);
 #endif
     }
 }
@@ -107,65 +133,52 @@ void is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3733_init_drivers(void) {
     i2c_init();
 
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_1, IS31FL3733_SYNC_1);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_2, IS31FL3733_SYNC_2);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_3, IS31FL3733_SYNC_3);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_4, IS31FL3733_SYNC_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3733_DRIVER_COUNT; i++) {
+        is31fl3733_init(i);
+    }
 
     for (int i = 0; i < IS31FL3733_LED_COUNT; i++) {
         is31fl3733_set_led_control_register(i, true, true, true);
     }
 
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3733_DRIVER_COUNT; i++) {
+        is31fl3733_update_led_control_registers(i);
+    }
 }
 
-void is31fl3733_init(uint8_t addr, uint8_t sync) {
+void is31fl3733_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
-    // Sync is passed so set it according to the datasheet.
 
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL);
+    is31fl3733_select_page(index, IS31FL3733_COMMAND_LED_CONTROL);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3733_write_register(addr, i, 0x00);
+        is31fl3733_write_register(index, i, 0x00);
     }
 
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM);
+    is31fl3733_select_page(index, IS31FL3733_COMMAND_PWM);
 
     // Set PWM on all LEDs to 0
     // No need to setup Breath registers to PWM as that is the default.
     for (uint8_t i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i++) {
-        is31fl3733_write_register(addr, i, 0x00);
+        is31fl3733_write_register(index, i, 0x00);
     }
 
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_FUNCTION);
+    is31fl3733_select_page(index, IS31FL3733_COMMAND_FUNCTION);
+
+    uint8_t sync = driver_sync[index];
 
     // Set de-ghost pull-up resistors (SWx)
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_SW_PULLUP, IS31FL3733_SW_PULLUP);
+    is31fl3733_write_register(index, IS31FL3733_FUNCTION_REG_SW_PULLUP, IS31FL3733_SW_PULLUP);
     // Set de-ghost pull-down resistors (CSx)
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_CS_PULLDOWN, IS31FL3733_CS_PULLDOWN);
+    is31fl3733_write_register(index, IS31FL3733_FUNCTION_REG_CS_PULLDOWN, IS31FL3733_CS_PULLDOWN);
     // Set global current to maximum.
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3733_GLOBAL_CURRENT);
+    is31fl3733_write_register(index, IS31FL3733_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3733_GLOBAL_CURRENT);
     // Disable software shutdown.
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_CONFIGURATION, ((sync & 0b11) << 6) | ((IS31FL3733_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+    is31fl3733_write_register(index, IS31FL3733_FUNCTION_REG_CONFIGURATION, ((sync & 0b11) << 6) | ((IS31FL3733_PWM_FREQUENCY & 0b111) << 3) | 0x01);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -224,22 +237,22 @@ void is31fl3733_set_led_control_register(uint8_t index, bool red, bool green, bo
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3733_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM);
+        is31fl3733_select_page(index, IS31FL3733_COMMAND_PWM);
 
-        is31fl3733_write_pwm_buffer(addr, index);
+        is31fl3733_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3733_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
-        is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL);
+        is31fl3733_select_page(index, IS31FL3733_COMMAND_LED_CONTROL);
 
         for (uint8_t i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3733_write_register(addr, i, g_led_control_registers[index][i]);
+            is31fl3733_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -247,14 +260,7 @@ void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3733_flush(void) {
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3733_DRIVER_COUNT; i++) {
+        is31fl3733_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3733.h b/drivers/led/issi/is31fl3733.h
index 532d35ed57..eef8efc455 100644
--- a/drivers/led/issi/is31fl3733.h
+++ b/drivers/led/issi/is31fl3733.h
@@ -140,9 +140,9 @@ typedef struct is31fl3733_led_t {
 extern const is31fl3733_led_t PROGMEM g_is31fl3733_leds[IS31FL3733_LED_COUNT];
 
 void is31fl3733_init_drivers(void);
-void is31fl3733_init(uint8_t addr, uint8_t sync);
-void is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3733_select_page(uint8_t addr, uint8_t page);
+void is31fl3733_init(uint8_t index);
+void is31fl3733_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3733_select_page(uint8_t index, uint8_t page);
 
 void is31fl3733_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3733_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
@@ -153,8 +153,8 @@ void is31fl3733_set_led_control_register(uint8_t index, bool red, bool green, bo
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3733_update_pwm_buffers(uint8_t index);
+void is31fl3733_update_led_control_registers(uint8_t index);
 
 void is31fl3733_flush(void);
 
diff --git a/drivers/led/issi/is31fl3736-mono.c b/drivers/led/issi/is31fl3736-mono.c
index 2bb83169a4..fa9c520fc6 100644
--- a/drivers/led/issi/is31fl3736-mono.c
+++ b/drivers/led/issi/is31fl3736-mono.c
@@ -46,6 +46,19 @@
 #    define IS31FL3736_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3736_DRIVER_COUNT] = {
+    IS31FL3736_I2C_ADDRESS_1,
+#ifdef IS31FL3736_I2C_ADDRESS_2
+    IS31FL3736_I2C_ADDRESS_2,
+#    ifdef IS31FL3736_I2C_ADDRESS_3
+    IS31FL3736_I2C_ADDRESS_3,
+#        ifdef IS31FL3736_I2C_ADDRESS_4
+    IS31FL3736_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3736 PWM registers.
 // The control buffers match the page 0 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -58,22 +71,22 @@ bool    g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT]                        = {false};
 
-void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3736_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3736_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3736_select_page(uint8_t addr, uint8_t page) {
-    is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, page);
+void is31fl3736_select_page(uint8_t index, uint8_t page) {
+    is31fl3736_write_register(index, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3736_write_register(index, IS31FL3736_REG_COMMAND, page);
 }
 
-void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3736_write_pwm_buffer(uint8_t index) {
     // Assumes page 1 is already selected.
     // Transmit PWM registers in 12 transfers of 16 bytes.
 
@@ -81,10 +94,10 @@ void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) {
 #if IS31FL3736_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3736_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT);
 #endif
     }
 }
@@ -92,64 +105,50 @@ void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3736_init_drivers(void) {
     i2c_init();
 
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_1);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_2);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_3);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) {
+        is31fl3736_init(i);
+    }
 
     for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
         is31fl3736_set_led_control_register(i, true);
     }
 
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) {
+        is31fl3736_update_led_control_registers(i);
+    }
 }
 
-void is31fl3736_init(uint8_t addr) {
+void is31fl3736_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
+    is31fl3736_select_page(index, IS31FL3736_COMMAND_LED_CONTROL);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3736_write_register(addr, i, 0x00);
+        is31fl3736_write_register(index, i, 0x00);
     }
 
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
+    is31fl3736_select_page(index, IS31FL3736_COMMAND_PWM);
 
     // Set PWM on all LEDs to 0
     // No need to setup Breath registers to PWM as that is the default.
     for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i++) {
-        is31fl3736_write_register(addr, i, 0x00);
+        is31fl3736_write_register(index, i, 0x00);
     }
 
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_FUNCTION);
+    is31fl3736_select_page(index, IS31FL3736_COMMAND_FUNCTION);
 
     // Set de-ghost pull-up resistors (SWx)
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP);
+    is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP);
     // Set de-ghost pull-down resistors (CSx)
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN);
+    is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN);
     // Set global current to maximum.
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT);
+    is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT);
     // Disable software shutdown.
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+    is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -198,22 +197,22 @@ void is31fl3736_set_led_control_register(uint8_t index, bool value) {
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3736_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
+        is31fl3736_select_page(index, IS31FL3736_COMMAND_PWM);
 
-        is31fl3736_write_pwm_buffer(addr, index);
+        is31fl3736_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3736_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
-        is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
+        is31fl3736_select_page(index, IS31FL3736_COMMAND_LED_CONTROL);
 
         for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3736_write_register(addr, i, g_led_control_registers[index][i]);
+            is31fl3736_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -221,14 +220,7 @@ void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3736_flush(void) {
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) {
+        is31fl3736_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3736-mono.h b/drivers/led/issi/is31fl3736-mono.h
index 43d1548c02..6571a9ab71 100644
--- a/drivers/led/issi/is31fl3736-mono.h
+++ b/drivers/led/issi/is31fl3736-mono.h
@@ -110,9 +110,9 @@ typedef struct is31fl3736_led_t {
 extern const is31fl3736_led_t PROGMEM g_is31fl3736_leds[IS31FL3736_LED_COUNT];
 
 void is31fl3736_init_drivers(void);
-void is31fl3736_init(uint8_t addr);
-void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3736_select_page(uint8_t addr, uint8_t page);
+void is31fl3736_init(uint8_t index);
+void is31fl3736_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3736_select_page(uint8_t index, uint8_t page);
 
 void is31fl3736_set_value(int index, uint8_t value);
 void is31fl3736_set_value_all(uint8_t value);
@@ -123,8 +123,8 @@ void is31fl3736_set_led_control_register(uint8_t index, bool value);
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3736_update_pwm_buffers(uint8_t index);
+void is31fl3736_update_led_control_registers(uint8_t index);
 
 void is31fl3736_flush(void);
 
diff --git a/drivers/led/issi/is31fl3736.c b/drivers/led/issi/is31fl3736.c
index e4cba2c398..b546589693 100644
--- a/drivers/led/issi/is31fl3736.c
+++ b/drivers/led/issi/is31fl3736.c
@@ -46,6 +46,19 @@
 #    define IS31FL3736_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3736_DRIVER_COUNT] = {
+    IS31FL3736_I2C_ADDRESS_1,
+#ifdef IS31FL3736_I2C_ADDRESS_2
+    IS31FL3736_I2C_ADDRESS_2,
+#    ifdef IS31FL3736_I2C_ADDRESS_3
+    IS31FL3736_I2C_ADDRESS_3,
+#        ifdef IS31FL3736_I2C_ADDRESS_4
+    IS31FL3736_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3736 PWM registers.
 // The control buffers match the page 0 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -58,22 +71,22 @@ bool    g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT]                        = {false};
 
-void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3736_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3736_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3736_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3736_select_page(uint8_t addr, uint8_t page) {
-    is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, page);
+void is31fl3736_select_page(uint8_t index, uint8_t page) {
+    is31fl3736_write_register(index, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3736_write_register(index, IS31FL3736_REG_COMMAND, page);
 }
 
-void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3736_write_pwm_buffer(uint8_t index) {
     // Assumes page 1 is already selected.
     // Transmit PWM registers in 12 transfers of 16 bytes.
 
@@ -81,10 +94,10 @@ void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) {
 #if IS31FL3736_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3736_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3736_I2C_TIMEOUT);
 #endif
     }
 }
@@ -92,64 +105,50 @@ void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3736_init_drivers(void) {
     i2c_init();
 
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_1);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_2);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_3);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) {
+        is31fl3736_init(i);
+    }
 
     for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
         is31fl3736_set_led_control_register(i, true, true, true);
     }
 
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) {
+        is31fl3736_update_led_control_registers(i);
+    }
 }
 
-void is31fl3736_init(uint8_t addr) {
+void is31fl3736_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
+    is31fl3736_select_page(index, IS31FL3736_COMMAND_LED_CONTROL);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3736_write_register(addr, i, 0x00);
+        is31fl3736_write_register(index, i, 0x00);
     }
 
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
+    is31fl3736_select_page(index, IS31FL3736_COMMAND_PWM);
 
     // Set PWM on all LEDs to 0
     // No need to setup Breath registers to PWM as that is the default.
     for (uint8_t i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i++) {
-        is31fl3736_write_register(addr, i, 0x00);
+        is31fl3736_write_register(index, i, 0x00);
     }
 
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_FUNCTION);
+    is31fl3736_select_page(index, IS31FL3736_COMMAND_FUNCTION);
 
     // Set de-ghost pull-up resistors (SWx)
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP);
+    is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP);
     // Set de-ghost pull-down resistors (CSx)
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN);
+    is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN);
     // Set global current to maximum.
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT);
+    is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT);
     // Disable software shutdown.
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+    is31fl3736_write_register(index, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -215,22 +214,22 @@ void is31fl3736_set_led_control_register(uint8_t index, bool red, bool green, bo
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3736_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
+        is31fl3736_select_page(index, IS31FL3736_COMMAND_PWM);
 
-        is31fl3736_write_pwm_buffer(addr, index);
+        is31fl3736_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3736_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
-        is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
+        is31fl3736_select_page(index, IS31FL3736_COMMAND_LED_CONTROL);
 
         for (uint8_t i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3736_write_register(addr, i, g_led_control_registers[index][i]);
+            is31fl3736_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -238,14 +237,7 @@ void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3736_flush(void) {
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3736_DRIVER_COUNT; i++) {
+        is31fl3736_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3736.h b/drivers/led/issi/is31fl3736.h
index 086edc0e4a..1649048f80 100644
--- a/drivers/led/issi/is31fl3736.h
+++ b/drivers/led/issi/is31fl3736.h
@@ -124,9 +124,9 @@ typedef struct is31fl3736_led_t {
 extern const is31fl3736_led_t PROGMEM g_is31fl3736_leds[IS31FL3736_LED_COUNT];
 
 void is31fl3736_init_drivers(void);
-void is31fl3736_init(uint8_t addr);
-void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3736_select_page(uint8_t addr, uint8_t page);
+void is31fl3736_init(uint8_t index);
+void is31fl3736_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3736_select_page(uint8_t index, uint8_t page);
 
 void is31fl3736_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3736_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
@@ -137,8 +137,8 @@ void is31fl3736_set_led_control_register(uint8_t index, bool red, bool green, bo
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3736_update_pwm_buffers(uint8_t index);
+void is31fl3736_update_led_control_registers(uint8_t index);
 
 void is31fl3736_flush(void);
 
diff --git a/drivers/led/issi/is31fl3737-mono.c b/drivers/led/issi/is31fl3737-mono.c
index 0e22ea8a6a..f11358b6a3 100644
--- a/drivers/led/issi/is31fl3737-mono.c
+++ b/drivers/led/issi/is31fl3737-mono.c
@@ -48,6 +48,19 @@
 #    define IS31FL3737_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3737_DRIVER_COUNT] = {
+    IS31FL3737_I2C_ADDRESS_1,
+#ifdef IS31FL3737_I2C_ADDRESS_2
+    IS31FL3737_I2C_ADDRESS_2,
+#    ifdef IS31FL3737_I2C_ADDRESS_3
+    IS31FL3737_I2C_ADDRESS_3,
+#        ifdef IS31FL3737_I2C_ADDRESS_4
+    IS31FL3737_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3737 PWM registers.
 // The control buffers match the page 0 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -61,22 +74,22 @@ bool    g_pwm_buffer_update_required[IS31FL3737_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][IS31FL3737_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT]                        = {false};
 
-void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3737_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3737_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3737_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3737_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3737_select_page(uint8_t addr, uint8_t page) {
-    is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, page);
+void is31fl3737_select_page(uint8_t index, uint8_t page) {
+    is31fl3737_write_register(index, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3737_write_register(index, IS31FL3737_REG_COMMAND, page);
 }
 
-void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3737_write_pwm_buffer(uint8_t index) {
     // Assumes page 1 is already selected.
     // Transmit PWM registers in 12 transfers of 16 bytes.
 
@@ -84,10 +97,10 @@ void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i += 16) {
 #if IS31FL3737_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3737_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT);
 #endif
     }
 }
@@ -95,64 +108,50 @@ void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3737_init_drivers(void) {
     i2c_init();
 
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_1);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_2);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_3);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3737_DRIVER_COUNT; i++) {
+        is31fl3737_init(i);
+    }
 
     for (int i = 0; i < IS31FL3737_LED_COUNT; i++) {
         is31fl3737_set_led_control_register(i, true);
     }
 
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3737_DRIVER_COUNT; i++) {
+        is31fl3737_update_led_control_registers(i);
+    }
 }
 
-void is31fl3737_init(uint8_t addr) {
+void is31fl3737_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL);
+    is31fl3737_select_page(index, IS31FL3737_COMMAND_LED_CONTROL);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3737_write_register(addr, i, 0x00);
+        is31fl3737_write_register(index, i, 0x00);
     }
 
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM);
+    is31fl3737_select_page(index, IS31FL3737_COMMAND_PWM);
 
     // Set PWM on all LEDs to 0
     // No need to setup Breath registers to PWM as that is the default.
     for (uint8_t i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i++) {
-        is31fl3737_write_register(addr, i, 0x00);
+        is31fl3737_write_register(index, i, 0x00);
     }
 
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_FUNCTION);
+    is31fl3737_select_page(index, IS31FL3737_COMMAND_FUNCTION);
 
     // Set de-ghost pull-up resistors (SWx)
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_SW_PULLUP, IS31FL3737_SW_PULLUP);
+    is31fl3737_write_register(index, IS31FL3737_FUNCTION_REG_SW_PULLUP, IS31FL3737_SW_PULLUP);
     // Set de-ghost pull-down resistors (CSx)
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_CS_PULLDOWN, IS31FL3737_CS_PULLDOWN);
+    is31fl3737_write_register(index, IS31FL3737_FUNCTION_REG_CS_PULLDOWN, IS31FL3737_CS_PULLDOWN);
     // Set global current to maximum.
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3737_GLOBAL_CURRENT);
+    is31fl3737_write_register(index, IS31FL3737_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3737_GLOBAL_CURRENT);
     // Disable software shutdown.
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_CONFIGURATION, ((IS31FL3737_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+    is31fl3737_write_register(index, IS31FL3737_FUNCTION_REG_CONFIGURATION, ((IS31FL3737_PWM_FREQUENCY & 0b111) << 3) | 0x01);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -195,22 +194,22 @@ void is31fl3737_set_led_control_register(uint8_t index, bool value) {
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3737_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM);
+        is31fl3737_select_page(index, IS31FL3737_COMMAND_PWM);
 
-        is31fl3737_write_pwm_buffer(addr, index);
+        is31fl3737_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3737_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
-        is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL);
+        is31fl3737_select_page(index, IS31FL3737_COMMAND_LED_CONTROL);
 
         for (uint8_t i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3737_write_register(addr, i, g_led_control_registers[index][i]);
+            is31fl3737_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -218,14 +217,7 @@ void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3737_flush(void) {
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3737_DRIVER_COUNT; i++) {
+        is31fl3737_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3737-mono.h b/drivers/led/issi/is31fl3737-mono.h
index 6d081bfa00..8c0b5ee30b 100644
--- a/drivers/led/issi/is31fl3737-mono.h
+++ b/drivers/led/issi/is31fl3737-mono.h
@@ -100,9 +100,9 @@ typedef struct is31fl3737_led_t {
 extern const is31fl3737_led_t PROGMEM g_is31fl3737_leds[IS31FL3737_LED_COUNT];
 
 void is31fl3737_init_drivers(void);
-void is31fl3737_init(uint8_t addr);
-void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3737_select_page(uint8_t addr, uint8_t page);
+void is31fl3737_init(uint8_t index);
+void is31fl3737_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3737_select_page(uint8_t index, uint8_t page);
 
 void is31fl3737_set_value(int index, uint8_t value);
 void is31fl3737_set_value_all(uint8_t value);
@@ -113,8 +113,8 @@ void is31fl3737_set_led_control_register(uint8_t index, bool value);
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3737_update_pwm_buffers(uint8_t index);
+void is31fl3737_update_led_control_registers(uint8_t index);
 
 void is31fl3737_flush(void);
 
diff --git a/drivers/led/issi/is31fl3737.c b/drivers/led/issi/is31fl3737.c
index e17d73c36f..20f068038a 100644
--- a/drivers/led/issi/is31fl3737.c
+++ b/drivers/led/issi/is31fl3737.c
@@ -48,6 +48,19 @@
 #    define IS31FL3737_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3737_DRIVER_COUNT] = {
+    IS31FL3737_I2C_ADDRESS_1,
+#ifdef IS31FL3737_I2C_ADDRESS_2
+    IS31FL3737_I2C_ADDRESS_2,
+#    ifdef IS31FL3737_I2C_ADDRESS_3
+    IS31FL3737_I2C_ADDRESS_3,
+#        ifdef IS31FL3737_I2C_ADDRESS_4
+    IS31FL3737_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3737 PWM registers.
 // The control buffers match the page 0 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -61,22 +74,22 @@ bool    g_pwm_buffer_update_required[IS31FL3737_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][IS31FL3737_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT]                        = {false};
 
-void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3737_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3737_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3737_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3737_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3737_select_page(uint8_t addr, uint8_t page) {
-    is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, page);
+void is31fl3737_select_page(uint8_t index, uint8_t page) {
+    is31fl3737_write_register(index, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3737_write_register(index, IS31FL3737_REG_COMMAND, page);
 }
 
-void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3737_write_pwm_buffer(uint8_t index) {
     // Assumes page 1 is already selected.
     // Transmit PWM registers in 12 transfers of 16 bytes.
 
@@ -84,10 +97,10 @@ void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i += 16) {
 #if IS31FL3737_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3737_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, IS31FL3737_I2C_TIMEOUT);
 #endif
     }
 }
@@ -95,64 +108,50 @@ void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3737_init_drivers(void) {
     i2c_init();
 
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_1);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_2);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_3);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3737_DRIVER_COUNT; i++) {
+        is31fl3737_init(i);
+    }
 
     for (int i = 0; i < IS31FL3737_LED_COUNT; i++) {
         is31fl3737_set_led_control_register(i, true, true, true);
     }
 
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3737_DRIVER_COUNT; i++) {
+        is31fl3737_update_led_control_registers(i);
+    }
 }
 
-void is31fl3737_init(uint8_t addr) {
+void is31fl3737_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL);
+    is31fl3737_select_page(index, IS31FL3737_COMMAND_LED_CONTROL);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3737_write_register(addr, i, 0x00);
+        is31fl3737_write_register(index, i, 0x00);
     }
 
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM);
+    is31fl3737_select_page(index, IS31FL3737_COMMAND_PWM);
 
     // Set PWM on all LEDs to 0
     // No need to setup Breath registers to PWM as that is the default.
     for (uint8_t i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i++) {
-        is31fl3737_write_register(addr, i, 0x00);
+        is31fl3737_write_register(index, i, 0x00);
     }
 
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_FUNCTION);
+    is31fl3737_select_page(index, IS31FL3737_COMMAND_FUNCTION);
 
     // Set de-ghost pull-up resistors (SWx)
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_SW_PULLUP, IS31FL3737_SW_PULLUP);
+    is31fl3737_write_register(index, IS31FL3737_FUNCTION_REG_SW_PULLUP, IS31FL3737_SW_PULLUP);
     // Set de-ghost pull-down resistors (CSx)
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_CS_PULLDOWN, IS31FL3737_CS_PULLDOWN);
+    is31fl3737_write_register(index, IS31FL3737_FUNCTION_REG_CS_PULLDOWN, IS31FL3737_CS_PULLDOWN);
     // Set global current to maximum.
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3737_GLOBAL_CURRENT);
+    is31fl3737_write_register(index, IS31FL3737_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3737_GLOBAL_CURRENT);
     // Disable software shutdown.
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_CONFIGURATION, ((IS31FL3737_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+    is31fl3737_write_register(index, IS31FL3737_FUNCTION_REG_CONFIGURATION, ((IS31FL3737_PWM_FREQUENCY & 0b111) << 3) | 0x01);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -211,22 +210,22 @@ void is31fl3737_set_led_control_register(uint8_t index, bool red, bool green, bo
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3737_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM);
+        is31fl3737_select_page(index, IS31FL3737_COMMAND_PWM);
 
-        is31fl3737_write_pwm_buffer(addr, index);
+        is31fl3737_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3737_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
-        is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL);
+        is31fl3737_select_page(index, IS31FL3737_COMMAND_LED_CONTROL);
 
         for (uint8_t i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3737_write_register(addr, i, g_led_control_registers[index][i]);
+            is31fl3737_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -234,14 +233,7 @@ void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3737_flush(void) {
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3737_DRIVER_COUNT; i++) {
+        is31fl3737_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3737.h b/drivers/led/issi/is31fl3737.h
index 7f0d86df82..d8f42bec29 100644
--- a/drivers/led/issi/is31fl3737.h
+++ b/drivers/led/issi/is31fl3737.h
@@ -117,9 +117,9 @@ typedef struct is31fl3737_led_t {
 extern const is31fl3737_led_t PROGMEM g_is31fl3737_leds[IS31FL3737_LED_COUNT];
 
 void is31fl3737_init_drivers(void);
-void is31fl3737_init(uint8_t addr);
-void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3737_select_page(uint8_t addr, uint8_t page);
+void is31fl3737_init(uint8_t index);
+void is31fl3737_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3737_select_page(uint8_t index, uint8_t page);
 
 void is31fl3737_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3737_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
@@ -130,8 +130,8 @@ void is31fl3737_set_led_control_register(uint8_t index, bool red, bool green, bo
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3737_update_pwm_buffers(uint8_t index);
+void is31fl3737_update_led_control_registers(uint8_t index);
 
 void is31fl3737_flush(void);
 
diff --git a/drivers/led/issi/is31fl3741-mono.c b/drivers/led/issi/is31fl3741-mono.c
index 4f388f56b0..dbe99f2f88 100644
--- a/drivers/led/issi/is31fl3741-mono.c
+++ b/drivers/led/issi/is31fl3741-mono.c
@@ -52,6 +52,19 @@
 #    define IS31FL3741_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3741_DRIVER_COUNT] = {
+    IS31FL3741_I2C_ADDRESS_1,
+#ifdef IS31FL3741_I2C_ADDRESS_2
+    IS31FL3741_I2C_ADDRESS_2,
+#    ifdef IS31FL3741_I2C_ADDRESS_3
+    IS31FL3741_I2C_ADDRESS_3,
+#        ifdef IS31FL3741_I2C_ADDRESS_4
+    IS31FL3741_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3741 and IS31FL3741A PWM registers.
 // The scaling buffers match the page 2 and 3 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -64,98 +77,84 @@ bool    g_scaling_registers_update_required[IS31FL3741_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3741_DRIVER_COUNT][IS31FL3741_SCALING_REGISTER_COUNT];
 
-void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3741_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3741_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3741_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3741_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3741_select_page(uint8_t addr, uint8_t page) {
-    is31fl3741_write_register(addr, IS31FL3741_REG_COMMAND_WRITE_LOCK, IS31FL3741_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3741_write_register(addr, IS31FL3741_REG_COMMAND, page);
+void is31fl3741_select_page(uint8_t index, uint8_t page) {
+    is31fl3741_write_register(index, IS31FL3741_REG_COMMAND_WRITE_LOCK, IS31FL3741_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3741_write_register(index, IS31FL3741_REG_COMMAND, page);
 }
 
-void is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3741_write_pwm_buffer(uint8_t index) {
     // Assume page 0 is already selected
 
     for (uint16_t i = 0; i < 342; i += 18) {
         if (i == 180) {
-            is31fl3741_select_page(addr, IS31FL3741_COMMAND_PWM_1);
+            is31fl3741_select_page(index, IS31FL3741_COMMAND_PWM_1);
         }
 
 #if IS31FL3741_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3741_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT);
 #endif
     }
 
     // transfer the left cause the total number is 351
 #if IS31FL3741_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT);
 #endif
 }
 
 void is31fl3741_init_drivers(void) {
     i2c_init();
 
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_1);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_2);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_3);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3741_DRIVER_COUNT; i++) {
+        is31fl3741_init(i);
+    }
 
     for (int i = 0; i < IS31FL3741_LED_COUNT; i++) {
         is31fl3741_set_led_control_register(i, true);
     }
 
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3741_DRIVER_COUNT; i++) {
+        is31fl3741_update_led_control_registers(i);
+    }
 }
 
-void is31fl3741_init(uint8_t addr) {
+void is31fl3741_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
     // Unlock the command register.
 
-    is31fl3741_select_page(addr, IS31FL3741_COMMAND_FUNCTION);
+    is31fl3741_select_page(index, IS31FL3741_COMMAND_FUNCTION);
 
     // Set to Normal operation
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_CONFIGURATION, IS31FL3741_CONFIGURATION);
+    is31fl3741_write_register(index, IS31FL3741_FUNCTION_REG_CONFIGURATION, IS31FL3741_CONFIGURATION);
 
     // Set Golbal Current Control Register
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3741_GLOBAL_CURRENT);
+    is31fl3741_write_register(index, IS31FL3741_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3741_GLOBAL_CURRENT);
     // Set Pull up & Down for SWx CSy
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_PULLDOWNUP, ((IS31FL3741_CS_PULLDOWN << 4) | IS31FL3741_SW_PULLUP));
+    is31fl3741_write_register(index, IS31FL3741_FUNCTION_REG_PULLDOWNUP, ((IS31FL3741_CS_PULLDOWN << 4) | IS31FL3741_SW_PULLUP));
     // Set PWM frequency
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3741_PWM_FREQUENCY & 0b1111));
+    is31fl3741_write_register(index, IS31FL3741_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3741_PWM_FREQUENCY & 0b1111));
 
-    // is31fl3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF);
+    // is31fl3741_update_led_scaling_registers(index, 0xFF, 0xFF, 0xFF);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -195,11 +194,11 @@ void is31fl3741_set_led_control_register(uint8_t index, bool value) {
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3741_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_PWM_0);
+        is31fl3741_select_page(index, IS31FL3741_COMMAND_PWM_0);
 
-        is31fl3741_write_pwm_buffer(addr, index);
+        is31fl3741_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
@@ -210,20 +209,20 @@ void is31fl3741_set_pwm_buffer(const is31fl3741_led_t *pled, uint8_t value) {
     g_pwm_buffer_update_required[pled->driver] = true;
 }
 
-void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3741_update_led_control_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_SCALING_0);
+        is31fl3741_select_page(index, IS31FL3741_COMMAND_SCALING_0);
 
         // CS1_SW1 to CS30_SW6 are on page 2
         for (int i = CS1_SW1; i <= CS30_SW6; ++i) {
-            is31fl3741_write_register(addr, i, g_scaling_registers[index][i]);
+            is31fl3741_write_register(index, i, g_scaling_registers[index][i]);
         }
 
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_SCALING_1);
+        is31fl3741_select_page(index, IS31FL3741_COMMAND_SCALING_1);
 
         // CS1_SW7 to CS39_SW9 are on page 3
         for (int i = CS1_SW7; i <= CS39_SW9; ++i) {
-            is31fl3741_write_register(addr, i - CS1_SW7, g_scaling_registers[index][i]);
+            is31fl3741_write_register(index, i - CS1_SW7, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -236,14 +235,7 @@ void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t valu
 }
 
 void is31fl3741_flush(void) {
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3741_DRIVER_COUNT; i++) {
+        is31fl3741_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3741-mono.h b/drivers/led/issi/is31fl3741-mono.h
index d2ba1b7d17..1a5374fdce 100644
--- a/drivers/led/issi/is31fl3741-mono.h
+++ b/drivers/led/issi/is31fl3741-mono.h
@@ -102,9 +102,9 @@ typedef struct is31fl3741_led_t {
 extern const is31fl3741_led_t PROGMEM g_is31fl3741_leds[IS31FL3741_LED_COUNT];
 
 void is31fl3741_init_drivers(void);
-void is31fl3741_init(uint8_t addr);
-void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3741_select_page(uint8_t addr, uint8_t page);
+void is31fl3741_init(uint8_t index);
+void is31fl3741_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3741_select_page(uint8_t index, uint8_t page);
 
 void is31fl3741_set_value(int index, uint8_t value);
 void is31fl3741_set_value_all(uint8_t value);
@@ -115,8 +115,8 @@ void is31fl3741_set_led_control_register(uint8_t index, bool value);
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3741_update_pwm_buffers(uint8_t index);
+void is31fl3741_update_led_control_registers(uint8_t index);
 void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t value);
 
 void is31fl3741_set_pwm_buffer(const is31fl3741_led_t *pled, uint8_t value);
diff --git a/drivers/led/issi/is31fl3741.c b/drivers/led/issi/is31fl3741.c
index 5f641aa53f..de6415a851 100644
--- a/drivers/led/issi/is31fl3741.c
+++ b/drivers/led/issi/is31fl3741.c
@@ -52,6 +52,19 @@
 #    define IS31FL3741_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3741_DRIVER_COUNT] = {
+    IS31FL3741_I2C_ADDRESS_1,
+#ifdef IS31FL3741_I2C_ADDRESS_2
+    IS31FL3741_I2C_ADDRESS_2,
+#    ifdef IS31FL3741_I2C_ADDRESS_3
+    IS31FL3741_I2C_ADDRESS_3,
+#        ifdef IS31FL3741_I2C_ADDRESS_4
+    IS31FL3741_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the IS31FL3741 and IS31FL3741A PWM registers.
 // The scaling buffers match the page 2 and 3 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -64,98 +77,84 @@ bool    g_scaling_registers_update_required[IS31FL3741_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3741_DRIVER_COUNT][IS31FL3741_SCALING_REGISTER_COUNT];
 
-void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3741_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3741_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3741_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3741_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3741_select_page(uint8_t addr, uint8_t page) {
-    is31fl3741_write_register(addr, IS31FL3741_REG_COMMAND_WRITE_LOCK, IS31FL3741_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3741_write_register(addr, IS31FL3741_REG_COMMAND, page);
+void is31fl3741_select_page(uint8_t index, uint8_t page) {
+    is31fl3741_write_register(index, IS31FL3741_REG_COMMAND_WRITE_LOCK, IS31FL3741_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3741_write_register(index, IS31FL3741_REG_COMMAND, page);
 }
 
-void is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3741_write_pwm_buffer(uint8_t index) {
     // Assume page 0 is already selected
 
     for (uint16_t i = 0; i < 342; i += 18) {
         if (i == 180) {
-            is31fl3741_select_page(addr, IS31FL3741_COMMAND_PWM_1);
+            is31fl3741_select_page(index, IS31FL3741_COMMAND_PWM_1);
         }
 
 #if IS31FL3741_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3741_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i % 180, g_pwm_buffer[index] + i, 18, IS31FL3741_I2C_TIMEOUT);
 #endif
     }
 
     // transfer the left cause the total number is 351
 #if IS31FL3741_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, 162, g_pwm_buffer[index] + 342, 9, IS31FL3741_I2C_TIMEOUT);
 #endif
 }
 
 void is31fl3741_init_drivers(void) {
     i2c_init();
 
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_1);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_2);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_3);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3741_DRIVER_COUNT; i++) {
+        is31fl3741_init(i);
+    }
 
     for (int i = 0; i < IS31FL3741_LED_COUNT; i++) {
         is31fl3741_set_led_control_register(i, true, true, true);
     }
 
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3741_DRIVER_COUNT; i++) {
+        is31fl3741_update_led_control_registers(i);
+    }
 }
 
-void is31fl3741_init(uint8_t addr) {
+void is31fl3741_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
     // Unlock the command register.
 
-    is31fl3741_select_page(addr, IS31FL3741_COMMAND_FUNCTION);
+    is31fl3741_select_page(index, IS31FL3741_COMMAND_FUNCTION);
 
     // Set to Normal operation
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_CONFIGURATION, IS31FL3741_CONFIGURATION);
+    is31fl3741_write_register(index, IS31FL3741_FUNCTION_REG_CONFIGURATION, IS31FL3741_CONFIGURATION);
 
     // Set Golbal Current Control Register
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3741_GLOBAL_CURRENT);
+    is31fl3741_write_register(index, IS31FL3741_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3741_GLOBAL_CURRENT);
     // Set Pull up & Down for SWx CSy
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_PULLDOWNUP, ((IS31FL3741_CS_PULLDOWN << 4) | IS31FL3741_SW_PULLUP));
+    is31fl3741_write_register(index, IS31FL3741_FUNCTION_REG_PULLDOWNUP, ((IS31FL3741_CS_PULLDOWN << 4) | IS31FL3741_SW_PULLUP));
     // Set PWM frequency
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3741_PWM_FREQUENCY & 0b1111));
+    is31fl3741_write_register(index, IS31FL3741_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3741_PWM_FREQUENCY & 0b1111));
 
-    // is31fl3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF);
+    // is31fl3741_update_led_scaling_registers(index, 0xFF, 0xFF, 0xFF);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -209,11 +208,11 @@ void is31fl3741_set_led_control_register(uint8_t index, bool red, bool green, bo
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3741_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_PWM_0);
+        is31fl3741_select_page(index, IS31FL3741_COMMAND_PWM_0);
 
-        is31fl3741_write_pwm_buffer(addr, index);
+        is31fl3741_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
@@ -226,20 +225,20 @@ void is31fl3741_set_pwm_buffer(const is31fl3741_led_t *pled, uint8_t red, uint8_
     g_pwm_buffer_update_required[pled->driver] = true;
 }
 
-void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index) {
+void is31fl3741_update_led_control_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_SCALING_0);
+        is31fl3741_select_page(index, IS31FL3741_COMMAND_SCALING_0);
 
         // CS1_SW1 to CS30_SW6 are on page 2
         for (int i = CS1_SW1; i <= CS30_SW6; ++i) {
-            is31fl3741_write_register(addr, i, g_scaling_registers[index][i]);
+            is31fl3741_write_register(index, i, g_scaling_registers[index][i]);
         }
 
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_SCALING_1);
+        is31fl3741_select_page(index, IS31FL3741_COMMAND_SCALING_1);
 
         // CS1_SW7 to CS39_SW9 are on page 3
         for (int i = CS1_SW7; i <= CS39_SW9; ++i) {
-            is31fl3741_write_register(addr, i - CS1_SW7, g_scaling_registers[index][i]);
+            is31fl3741_write_register(index, i - CS1_SW7, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -254,14 +253,7 @@ void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t red,
 }
 
 void is31fl3741_flush(void) {
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3741_DRIVER_COUNT; i++) {
+        is31fl3741_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3741.h b/drivers/led/issi/is31fl3741.h
index e7777a88d5..fd8a3a5329 100644
--- a/drivers/led/issi/is31fl3741.h
+++ b/drivers/led/issi/is31fl3741.h
@@ -119,9 +119,9 @@ typedef struct is31fl3741_led_t {
 extern const is31fl3741_led_t PROGMEM g_is31fl3741_leds[IS31FL3741_LED_COUNT];
 
 void is31fl3741_init_drivers(void);
-void is31fl3741_init(uint8_t addr);
-void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3741_select_page(uint8_t addr, uint8_t page);
+void is31fl3741_init(uint8_t index);
+void is31fl3741_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3741_select_page(uint8_t index, uint8_t page);
 
 void is31fl3741_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3741_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
@@ -132,8 +132,8 @@ void is31fl3741_set_led_control_register(uint8_t index, bool red, bool green, bo
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3741_update_pwm_buffers(uint8_t index);
+void is31fl3741_update_led_control_registers(uint8_t index);
 void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t red, uint8_t green, uint8_t blue);
 
 void is31fl3741_set_pwm_buffer(const is31fl3741_led_t *pled, uint8_t red, uint8_t green, uint8_t blue);
diff --git a/drivers/led/issi/is31fl3742a-mono.c b/drivers/led/issi/is31fl3742a-mono.c
index 3a607f02d1..3bef22aabc 100644
--- a/drivers/led/issi/is31fl3742a-mono.c
+++ b/drivers/led/issi/is31fl3742a-mono.c
@@ -53,28 +53,41 @@
 #    define IS31FL3742A_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3742A_DRIVER_COUNT] = {
+    IS31FL3742A_I2C_ADDRESS_1,
+#ifdef IS31FL3742A_I2C_ADDRESS_2
+    IS31FL3742A_I2C_ADDRESS_2,
+#    ifdef IS31FL3742A_I2C_ADDRESS_3
+    IS31FL3742A_I2C_ADDRESS_3,
+#        ifdef IS31FL3742A_I2C_ADDRESS_4
+    IS31FL3742A_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 uint8_t g_pwm_buffer[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_PWM_REGISTER_COUNT];
 bool    g_pwm_buffer_update_required[IS31FL3742A_DRIVER_COUNT]        = {false};
 bool    g_scaling_registers_update_required[IS31FL3742A_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_SCALING_REGISTER_COUNT];
 
-void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3742a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3742A_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3742a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND_WRITE_LOCK, IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND, page);
+void is31fl3742a_select_page(uint8_t index, uint8_t page) {
+    is31fl3742a_write_register(index, IS31FL3742A_REG_COMMAND_WRITE_LOCK, IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3742a_write_register(index, IS31FL3742A_REG_COMMAND, page);
 }
 
-void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3742a_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 6 transfers of 30 bytes.
 
@@ -82,10 +95,10 @@ void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 30) {
 #if IS31FL3742A_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3742A_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT);
 #endif
     }
 }
@@ -93,58 +106,44 @@ void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3742a_init_drivers(void) {
     i2c_init();
 
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_1);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_2);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_3);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) {
+        is31fl3742a_init(i);
+    }
 
     for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) {
         is31fl3742a_set_scaling_register(i, 0xFF);
     }
 
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) {
+        is31fl3742a_update_scaling_registers(i);
+    }
 }
 
-void is31fl3742a_init(uint8_t addr) {
+void is31fl3742a_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
+    is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3742a_write_register(addr, i, 0x00);
+        is31fl3742a_write_register(index, i, 0x00);
     }
 
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+    is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM);
 
     for (uint8_t i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i++) {
-        is31fl3742a_write_register(addr, i, 0x00);
+        is31fl3742a_write_register(index, i, 0x00);
     }
 
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_FUNCTION);
+    is31fl3742a_select_page(index, IS31FL3742A_COMMAND_FUNCTION);
 
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PULLDOWNUP, (IS31FL3742A_SW_PULLDOWN << 4) | IS31FL3742A_CS_PULLUP);
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3742A_GLOBAL_CURRENT);
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3742A_PWM_FREQUENCY & 0b0111));
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_CONFIGURATION, IS31FL3742A_CONFIGURATION);
+    is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_PULLDOWNUP, (IS31FL3742A_SW_PULLDOWN << 4) | IS31FL3742A_CS_PULLUP);
+    is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3742A_GLOBAL_CURRENT);
+    is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3742A_PWM_FREQUENCY & 0b0111));
+    is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_CONFIGURATION, IS31FL3742A_CONFIGURATION);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -179,22 +178,22 @@ void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value) {
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3742a_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM);
 
-        is31fl3742a_write_pwm_buffer(addr, index);
+        is31fl3742a_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) {
+void is31fl3742a_update_scaling_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
+        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING);
 
         for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3742a_write_register(addr, i, g_scaling_registers[index][i]);
+            is31fl3742a_write_register(index, i, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -202,14 +201,7 @@ void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3742a_flush(void) {
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) {
+        is31fl3742a_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3742a-mono.h b/drivers/led/issi/is31fl3742a-mono.h
index 8de284fa7d..933805bc8e 100644
--- a/drivers/led/issi/is31fl3742a-mono.h
+++ b/drivers/led/issi/is31fl3742a-mono.h
@@ -72,17 +72,17 @@ typedef struct is31fl3742a_led_t {
 extern const is31fl3742a_led_t PROGMEM g_is31fl3742a_leds[IS31FL3742A_LED_COUNT];
 
 void is31fl3742a_init_drivers(void);
-void is31fl3742a_init(uint8_t addr);
-void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3742a_select_page(uint8_t addr, uint8_t page);
+void is31fl3742a_init(uint8_t index);
+void is31fl3742a_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3742a_select_page(uint8_t index, uint8_t page);
 
 void is31fl3742a_set_value(int index, uint8_t value);
 void is31fl3742a_set_value_all(uint8_t value);
 
 void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value);
 
-void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index);
+void is31fl3742a_update_pwm_buffers(uint8_t index);
+void is31fl3742a_update_scaling_registers(uint8_t index);
 
 void is31fl3742a_flush(void);
 
diff --git a/drivers/led/issi/is31fl3742a.c b/drivers/led/issi/is31fl3742a.c
index 2e6cf151c3..1fbec5fba6 100644
--- a/drivers/led/issi/is31fl3742a.c
+++ b/drivers/led/issi/is31fl3742a.c
@@ -53,28 +53,41 @@
 #    define IS31FL3742A_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3742A_DRIVER_COUNT] = {
+    IS31FL3742A_I2C_ADDRESS_1,
+#ifdef IS31FL3742A_I2C_ADDRESS_2
+    IS31FL3742A_I2C_ADDRESS_2,
+#    ifdef IS31FL3742A_I2C_ADDRESS_3
+    IS31FL3742A_I2C_ADDRESS_3,
+#        ifdef IS31FL3742A_I2C_ADDRESS_4
+    IS31FL3742A_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 uint8_t g_pwm_buffer[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_PWM_REGISTER_COUNT];
 bool    g_pwm_buffer_update_required[IS31FL3742A_DRIVER_COUNT]        = {false};
 bool    g_scaling_registers_update_required[IS31FL3742A_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_SCALING_REGISTER_COUNT];
 
-void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3742a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3742A_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3742a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND_WRITE_LOCK, IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND, page);
+void is31fl3742a_select_page(uint8_t index, uint8_t page) {
+    is31fl3742a_write_register(index, IS31FL3742A_REG_COMMAND_WRITE_LOCK, IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3742a_write_register(index, IS31FL3742A_REG_COMMAND, page);
 }
 
-void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3742a_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 6 transfers of 30 bytes.
 
@@ -82,10 +95,10 @@ void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 30) {
 #if IS31FL3742A_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3742A_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT);
 #endif
     }
 }
@@ -93,58 +106,44 @@ void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3742a_init_drivers(void) {
     i2c_init();
 
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_1);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_2);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_3);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) {
+        is31fl3742a_init(i);
+    }
 
     for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) {
         is31fl3742a_set_scaling_register(i, 0xFF, 0xFF, 0xFF);
     }
 
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) {
+        is31fl3742a_update_scaling_registers(i);
+    }
 }
 
-void is31fl3742a_init(uint8_t addr) {
+void is31fl3742a_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
+    is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3742a_write_register(addr, i, 0x00);
+        is31fl3742a_write_register(index, i, 0x00);
     }
 
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+    is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM);
 
     for (uint8_t i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i++) {
-        is31fl3742a_write_register(addr, i, 0x00);
+        is31fl3742a_write_register(index, i, 0x00);
     }
 
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_FUNCTION);
+    is31fl3742a_select_page(index, IS31FL3742A_COMMAND_FUNCTION);
 
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PULLDOWNUP, (IS31FL3742A_SW_PULLDOWN << 4) | IS31FL3742A_CS_PULLUP);
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3742A_GLOBAL_CURRENT);
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3742A_PWM_FREQUENCY & 0b0111));
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_CONFIGURATION, IS31FL3742A_CONFIGURATION);
+    is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_PULLDOWNUP, (IS31FL3742A_SW_PULLDOWN << 4) | IS31FL3742A_CS_PULLUP);
+    is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3742A_GLOBAL_CURRENT);
+    is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3742A_PWM_FREQUENCY & 0b0111));
+    is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_CONFIGURATION, IS31FL3742A_CONFIGURATION);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -183,22 +182,22 @@ void is31fl3742a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green,
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3742a_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM);
 
-        is31fl3742a_write_pwm_buffer(addr, index);
+        is31fl3742a_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) {
+void is31fl3742a_update_scaling_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
+        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING);
 
         for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3742a_write_register(addr, i, g_scaling_registers[index][i]);
+            is31fl3742a_write_register(index, i, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -206,14 +205,7 @@ void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3742a_flush(void) {
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) {
+        is31fl3742a_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3742a.h b/drivers/led/issi/is31fl3742a.h
index 5f34a3cdb9..2d7be1488b 100644
--- a/drivers/led/issi/is31fl3742a.h
+++ b/drivers/led/issi/is31fl3742a.h
@@ -74,17 +74,17 @@ typedef struct is31fl3742a_led_t {
 extern const is31fl3742a_led_t PROGMEM g_is31fl3742a_leds[IS31FL3742A_LED_COUNT];
 
 void is31fl3742a_init_drivers(void);
-void is31fl3742a_init(uint8_t addr);
-void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3742a_select_page(uint8_t addr, uint8_t page);
+void is31fl3742a_init(uint8_t index);
+void is31fl3742a_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3742a_select_page(uint8_t index, uint8_t page);
 
 void is31fl3742a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3742a_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
 
 void is31fl3742a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue);
 
-void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index);
+void is31fl3742a_update_pwm_buffers(uint8_t index);
+void is31fl3742a_update_scaling_registers(uint8_t index);
 
 void is31fl3742a_flush(void);
 
diff --git a/drivers/led/issi/is31fl3743a-mono.c b/drivers/led/issi/is31fl3743a-mono.c
index 4df0956ed2..49f5959ac8 100644
--- a/drivers/led/issi/is31fl3743a-mono.c
+++ b/drivers/led/issi/is31fl3743a-mono.c
@@ -62,28 +62,54 @@
 #    define IS31FL3743A_SYNC_4 IS31FL3743A_SYNC_NONE
 #endif
 
+const uint8_t i2c_addresses[IS31FL3743A_DRIVER_COUNT] = {
+    IS31FL3743A_I2C_ADDRESS_1,
+#ifdef IS31FL3743A_I2C_ADDRESS_2
+    IS31FL3743A_I2C_ADDRESS_2,
+#    ifdef IS31FL3743A_I2C_ADDRESS_3
+    IS31FL3743A_I2C_ADDRESS_3,
+#        ifdef IS31FL3743A_I2C_ADDRESS_4
+    IS31FL3743A_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
+const uint8_t driver_sync[IS31FL3743A_DRIVER_COUNT] = {
+    IS31FL3743A_SYNC_1,
+#ifdef IS31FL3743A_I2C_ADDRESS_2
+    IS31FL3743A_SYNC_2,
+#    ifdef IS31FL3743A_I2C_ADDRESS_3
+    IS31FL3743A_SYNC_3,
+#        ifdef IS31FL3743A_I2C_ADDRESS_4
+    IS31FL3743A_SYNC_4,
+#        endif
+#    endif
+#endif
+};
+
 uint8_t g_pwm_buffer[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_PWM_REGISTER_COUNT];
 bool    g_pwm_buffer_update_required[IS31FL3743A_DRIVER_COUNT]        = {false};
 bool    g_scaling_registers_update_required[IS31FL3743A_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_SCALING_REGISTER_COUNT];
 
-void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3743a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3743A_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3743A_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3743A_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3743A_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3743a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND_WRITE_LOCK, IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND, page);
+void is31fl3743a_select_page(uint8_t index, uint8_t page) {
+    is31fl3743a_write_register(index, IS31FL3743A_REG_COMMAND_WRITE_LOCK, IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3743a_write_register(index, IS31FL3743A_REG_COMMAND, page);
 }
 
-void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3743a_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 11 transfers of 18 bytes.
 
@@ -91,10 +117,10 @@ void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i += 18) {
 #if IS31FL3743A_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3743A_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT);
 #endif
     }
 }
@@ -102,58 +128,46 @@ void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3743a_init_drivers(void) {
     i2c_init();
 
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_1, IS31FL3743A_SYNC_1);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_2, IS31FL3743A_SYNC_2);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_3, IS31FL3743A_SYNC_3);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_4, IS31FL3743A_SYNC_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3743A_DRIVER_COUNT; i++) {
+        is31fl3743a_init(i);
+    }
 
     for (int i = 0; i < IS31FL3743A_LED_COUNT; i++) {
         is31fl3743a_set_scaling_register(i, 0xFF);
     }
 
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3743A_DRIVER_COUNT; i++) {
+        is31fl3743a_update_scaling_registers(i);
+    }
 }
 
-void is31fl3743a_init(uint8_t addr, uint8_t sync) {
+void is31fl3743a_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
+    is31fl3743a_select_page(index, IS31FL3743A_COMMAND_SCALING);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3743a_write_register(addr, i + 1, 0x00);
+        is31fl3743a_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
+    is31fl3743a_select_page(index, IS31FL3743A_COMMAND_PWM);
 
     for (uint8_t i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i++) {
-        is31fl3743a_write_register(addr, i + 1, 0x00);
+        is31fl3743a_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_FUNCTION);
+    is31fl3743a_select_page(index, IS31FL3743A_COMMAND_FUNCTION);
 
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_PULLDOWNUP, (IS31FL3743A_SW_PULLDOWN << 4) | IS31FL3743A_CS_PULLUP);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3743A_GLOBAL_CURRENT);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_CONFIGURATION, IS31FL3743A_CONFIGURATION);
+    uint8_t sync = driver_sync[index];
+
+    is31fl3743a_write_register(index, IS31FL3743A_FUNCTION_REG_PULLDOWNUP, (IS31FL3743A_SW_PULLDOWN << 4) | IS31FL3743A_CS_PULLUP);
+    is31fl3743a_write_register(index, IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3743A_GLOBAL_CURRENT);
+    is31fl3743a_write_register(index, IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
+    is31fl3743a_write_register(index, IS31FL3743A_FUNCTION_REG_CONFIGURATION, IS31FL3743A_CONFIGURATION);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -188,22 +202,22 @@ void is31fl3743a_set_scaling_register(uint8_t index, uint8_t value) {
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3743a_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
+        is31fl3743a_select_page(index, IS31FL3743A_COMMAND_PWM);
 
-        is31fl3743a_write_pwm_buffer(addr, index);
+        is31fl3743a_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index) {
+void is31fl3743a_update_scaling_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
+        is31fl3743a_select_page(index, IS31FL3743A_COMMAND_SCALING);
 
         for (uint8_t i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3743a_write_register(addr, i + 1, g_scaling_registers[index][i]);
+            is31fl3743a_write_register(index, i + 1, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -211,14 +225,7 @@ void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3743a_flush(void) {
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3743A_DRIVER_COUNT; i++) {
+        is31fl3743a_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3743a-mono.h b/drivers/led/issi/is31fl3743a-mono.h
index 8ec3ce0755..28789c32bb 100644
--- a/drivers/led/issi/is31fl3743a-mono.h
+++ b/drivers/led/issi/is31fl3743a-mono.h
@@ -82,17 +82,17 @@ typedef struct is31fl3743a_led_t {
 extern const is31fl3743a_led_t PROGMEM g_is31fl3743a_leds[IS31FL3743A_LED_COUNT];
 
 void is31fl3743a_init_drivers(void);
-void is31fl3743a_init(uint8_t addr, uint8_t sync);
-void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3743a_select_page(uint8_t addr, uint8_t page);
+void is31fl3743a_init(uint8_t index);
+void is31fl3743a_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3743a_select_page(uint8_t index, uint8_t page);
 
 void is31fl3743a_set_value(int index, uint8_t value);
 void is31fl3743a_set_value_all(uint8_t value);
 
 void is31fl3743a_set_scaling_register(uint8_t index, uint8_t value);
 
-void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index);
+void is31fl3743a_update_pwm_buffers(uint8_t index);
+void is31fl3743a_update_scaling_registers(uint8_t index);
 
 void is31fl3743a_flush(void);
 
diff --git a/drivers/led/issi/is31fl3743a.c b/drivers/led/issi/is31fl3743a.c
index f9cdb130da..99f74e8743 100644
--- a/drivers/led/issi/is31fl3743a.c
+++ b/drivers/led/issi/is31fl3743a.c
@@ -62,28 +62,54 @@
 #    define IS31FL3743A_SYNC_4 IS31FL3743A_SYNC_NONE
 #endif
 
+const uint8_t i2c_addresses[IS31FL3743A_DRIVER_COUNT] = {
+    IS31FL3743A_I2C_ADDRESS_1,
+#ifdef IS31FL3743A_I2C_ADDRESS_2
+    IS31FL3743A_I2C_ADDRESS_2,
+#    ifdef IS31FL3743A_I2C_ADDRESS_3
+    IS31FL3743A_I2C_ADDRESS_3,
+#        ifdef IS31FL3743A_I2C_ADDRESS_4
+    IS31FL3743A_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
+const uint8_t driver_sync[IS31FL3743A_DRIVER_COUNT] = {
+    IS31FL3743A_SYNC_1,
+#ifdef IS31FL3743A_I2C_ADDRESS_2
+    IS31FL3743A_SYNC_2,
+#    ifdef IS31FL3743A_I2C_ADDRESS_3
+    IS31FL3743A_SYNC_3,
+#        ifdef IS31FL3743A_I2C_ADDRESS_4
+    IS31FL3743A_SYNC_4,
+#        endif
+#    endif
+#endif
+};
+
 uint8_t g_pwm_buffer[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_PWM_REGISTER_COUNT];
 bool    g_pwm_buffer_update_required[IS31FL3743A_DRIVER_COUNT]        = {false};
 bool    g_scaling_registers_update_required[IS31FL3743A_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_SCALING_REGISTER_COUNT];
 
-void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3743a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3743A_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3743A_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3743A_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3743A_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3743a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND_WRITE_LOCK, IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND, page);
+void is31fl3743a_select_page(uint8_t index, uint8_t page) {
+    is31fl3743a_write_register(index, IS31FL3743A_REG_COMMAND_WRITE_LOCK, IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3743a_write_register(index, IS31FL3743A_REG_COMMAND, page);
 }
 
-void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3743a_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 11 transfers of 18 bytes.
 
@@ -91,10 +117,10 @@ void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i += 18) {
 #if IS31FL3743A_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3743A_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3743A_I2C_TIMEOUT);
 #endif
     }
 }
@@ -102,58 +128,46 @@ void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3743a_init_drivers(void) {
     i2c_init();
 
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_1, IS31FL3743A_SYNC_1);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_2, IS31FL3743A_SYNC_2);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_3, IS31FL3743A_SYNC_3);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_4, IS31FL3743A_SYNC_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3743A_DRIVER_COUNT; i++) {
+        is31fl3743a_init(i);
+    }
 
     for (int i = 0; i < IS31FL3743A_LED_COUNT; i++) {
         is31fl3743a_set_scaling_register(i, 0xFF, 0xFF, 0xFF);
     }
 
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3743A_DRIVER_COUNT; i++) {
+        is31fl3743a_update_scaling_registers(i);
+    }
 }
 
-void is31fl3743a_init(uint8_t addr, uint8_t sync) {
+void is31fl3743a_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
+    is31fl3743a_select_page(index, IS31FL3743A_COMMAND_SCALING);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3743a_write_register(addr, i + 1, 0x00);
+        is31fl3743a_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
+    is31fl3743a_select_page(index, IS31FL3743A_COMMAND_PWM);
 
     for (uint8_t i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i++) {
-        is31fl3743a_write_register(addr, i + 1, 0x00);
+        is31fl3743a_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_FUNCTION);
+    is31fl3743a_select_page(index, IS31FL3743A_COMMAND_FUNCTION);
 
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_PULLDOWNUP, (IS31FL3743A_SW_PULLDOWN << 4) | IS31FL3743A_CS_PULLUP);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3743A_GLOBAL_CURRENT);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_CONFIGURATION, IS31FL3743A_CONFIGURATION);
+    uint8_t sync = driver_sync[index];
+
+    is31fl3743a_write_register(index, IS31FL3743A_FUNCTION_REG_PULLDOWNUP, (IS31FL3743A_SW_PULLDOWN << 4) | IS31FL3743A_CS_PULLUP);
+    is31fl3743a_write_register(index, IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3743A_GLOBAL_CURRENT);
+    is31fl3743a_write_register(index, IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
+    is31fl3743a_write_register(index, IS31FL3743A_FUNCTION_REG_CONFIGURATION, IS31FL3743A_CONFIGURATION);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -192,22 +206,22 @@ void is31fl3743a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green,
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3743a_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
+        is31fl3743a_select_page(index, IS31FL3743A_COMMAND_PWM);
 
-        is31fl3743a_write_pwm_buffer(addr, index);
+        is31fl3743a_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index) {
+void is31fl3743a_update_scaling_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
+        is31fl3743a_select_page(index, IS31FL3743A_COMMAND_SCALING);
 
         for (uint8_t i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3743a_write_register(addr, i + 1, g_scaling_registers[index][i]);
+            is31fl3743a_write_register(index, i + 1, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -215,14 +229,7 @@ void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3743a_flush(void) {
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3743A_DRIVER_COUNT; i++) {
+        is31fl3743a_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3743a.h b/drivers/led/issi/is31fl3743a.h
index 381b853716..416197bc0c 100644
--- a/drivers/led/issi/is31fl3743a.h
+++ b/drivers/led/issi/is31fl3743a.h
@@ -84,17 +84,17 @@ typedef struct is31fl3743a_led_t {
 extern const is31fl3743a_led_t PROGMEM g_is31fl3743a_leds[IS31FL3743A_LED_COUNT];
 
 void is31fl3743a_init_drivers(void);
-void is31fl3743a_init(uint8_t addr, uint8_t sync);
-void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3743a_select_page(uint8_t addr, uint8_t page);
+void is31fl3743a_init(uint8_t index);
+void is31fl3743a_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3743a_select_page(uint8_t index, uint8_t page);
 
 void is31fl3743a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3743a_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
 
 void is31fl3743a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue);
 
-void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index);
+void is31fl3743a_update_pwm_buffers(uint8_t index);
+void is31fl3743a_update_scaling_registers(uint8_t index);
 
 void is31fl3743a_flush(void);
 
diff --git a/drivers/led/issi/is31fl3745-mono.c b/drivers/led/issi/is31fl3745-mono.c
index 2b68c96326..edb12b78bb 100644
--- a/drivers/led/issi/is31fl3745-mono.c
+++ b/drivers/led/issi/is31fl3745-mono.c
@@ -62,28 +62,54 @@
 #    define IS31FL3745_SYNC_4 IS31FL3745_SYNC_NONE
 #endif
 
+const uint8_t i2c_addresses[IS31FL3745_DRIVER_COUNT] = {
+    IS31FL3745_I2C_ADDRESS_1,
+#ifdef IS31FL3745_I2C_ADDRESS_2
+    IS31FL3745_I2C_ADDRESS_2,
+#    ifdef IS31FL3745_I2C_ADDRESS_3
+    IS31FL3745_I2C_ADDRESS_3,
+#        ifdef IS31FL3745_I2C_ADDRESS_4
+    IS31FL3745_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
+const uint8_t driver_sync[IS31FL3745_DRIVER_COUNT] = {
+    IS31FL3745_SYNC_1,
+#ifdef IS31FL3745_I2C_ADDRESS_2
+    IS31FL3745_SYNC_2,
+#    ifdef IS31FL3745_I2C_ADDRESS_3
+    IS31FL3745_SYNC_3,
+#        ifdef IS31FL3745_I2C_ADDRESS_4
+    IS31FL3745_SYNC_4,
+#        endif
+#    endif
+#endif
+};
+
 uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
 bool    g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT]        = {false};
 bool    g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
 
-void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3745_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3745_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3745_select_page(uint8_t addr, uint8_t page) {
-    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND, page);
+void is31fl3745_select_page(uint8_t index, uint8_t page) {
+    is31fl3745_write_register(index, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3745_write_register(index, IS31FL3745_REG_COMMAND, page);
 }
 
-void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3745_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 8 transfers of 18 bytes.
 
@@ -91,10 +117,10 @@ void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 18) {
 #if IS31FL3745_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3745_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT);
 #endif
     }
 }
@@ -102,58 +128,46 @@ void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3745_init_drivers(void) {
     i2c_init();
 
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_1, IS31FL3745_SYNC_1);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_2, IS31FL3745_SYNC_2);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_3, IS31FL3745_SYNC_3);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_4, IS31FL3745_SYNC_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
+        is31fl3745_init(i);
+    }
 
     for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
         is31fl3745_set_scaling_register(i, 0xFF);
     }
 
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
+        is31fl3745_update_scaling_registers(i);
+    }
 }
 
-void is31fl3745_init(uint8_t addr, uint8_t sync) {
+void is31fl3745_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+    is31fl3745_select_page(index, IS31FL3745_COMMAND_SCALING);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
-        is31fl3745_write_register(addr, i + 1, 0x00);
+        is31fl3745_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+    is31fl3745_select_page(index, IS31FL3745_COMMAND_PWM);
 
     for (uint8_t i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i++) {
-        is31fl3745_write_register(addr, i + 1, 0x00);
+        is31fl3745_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_FUNCTION);
+    is31fl3745_select_page(index, IS31FL3745_COMMAND_FUNCTION);
 
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
+    uint8_t sync = driver_sync[index];
+
+    is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
+    is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
+    is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
+    is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -188,22 +202,22 @@ void is31fl3745_set_scaling_register(uint8_t index, uint8_t value) {
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3745_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+        is31fl3745_select_page(index, IS31FL3745_COMMAND_PWM);
 
-        is31fl3745_write_pwm_buffer(addr, index);
+        is31fl3745_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index) {
+void is31fl3745_update_scaling_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+        is31fl3745_select_page(index, IS31FL3745_COMMAND_SCALING);
 
         for (uint8_t i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
-            is31fl3745_write_register(addr, i + 1, g_scaling_registers[index][i]);
+            is31fl3745_write_register(index, i + 1, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -211,14 +225,7 @@ void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3745_flush(void) {
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
+        is31fl3745_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3745-mono.h b/drivers/led/issi/is31fl3745-mono.h
index f60f0acfd9..02d926cd7d 100644
--- a/drivers/led/issi/is31fl3745-mono.h
+++ b/drivers/led/issi/is31fl3745-mono.h
@@ -82,17 +82,17 @@ typedef struct is31fl3745_led_t {
 extern const is31fl3745_led_t PROGMEM g_is31fl3745_leds[IS31FL3745_LED_COUNT];
 
 void is31fl3745_init_drivers(void);
-void is31fl3745_init(uint8_t addr, uint8_t sync);
-void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3745_select_page(uint8_t addr, uint8_t page);
+void is31fl3745_init(uint8_t index);
+void is31fl3745_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3745_select_page(uint8_t index, uint8_t page);
 
 void is31fl3745_set_value(int index, uint8_t value);
 void is31fl3745_set_value_all(uint8_t value);
 
 void is31fl3745_set_scaling_register(uint8_t index, uint8_t value);
 
-void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index);
+void is31fl3745_update_pwm_buffers(uint8_t index);
+void is31fl3745_update_scaling_registers(uint8_t index);
 
 void is31fl3745_flush(void);
 
diff --git a/drivers/led/issi/is31fl3745.c b/drivers/led/issi/is31fl3745.c
index 0f91a75bcc..3a67f6819a 100644
--- a/drivers/led/issi/is31fl3745.c
+++ b/drivers/led/issi/is31fl3745.c
@@ -62,28 +62,54 @@
 #    define IS31FL3745_SYNC_4 IS31FL3745_SYNC_NONE
 #endif
 
+const uint8_t i2c_addresses[IS31FL3745_DRIVER_COUNT] = {
+    IS31FL3745_I2C_ADDRESS_1,
+#ifdef IS31FL3745_I2C_ADDRESS_2
+    IS31FL3745_I2C_ADDRESS_2,
+#    ifdef IS31FL3745_I2C_ADDRESS_3
+    IS31FL3745_I2C_ADDRESS_3,
+#        ifdef IS31FL3745_I2C_ADDRESS_4
+    IS31FL3745_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
+const uint8_t driver_sync[IS31FL3745_DRIVER_COUNT] = {
+    IS31FL3745_SYNC_1,
+#ifdef IS31FL3745_I2C_ADDRESS_2
+    IS31FL3745_SYNC_2,
+#    ifdef IS31FL3745_I2C_ADDRESS_3
+    IS31FL3745_SYNC_3,
+#        ifdef IS31FL3745_I2C_ADDRESS_4
+    IS31FL3745_SYNC_4,
+#        endif
+#    endif
+#endif
+};
+
 uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
 bool    g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT]        = {false};
 bool    g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
 
-void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3745_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3745_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3745_select_page(uint8_t addr, uint8_t page) {
-    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND, page);
+void is31fl3745_select_page(uint8_t index, uint8_t page) {
+    is31fl3745_write_register(index, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3745_write_register(index, IS31FL3745_REG_COMMAND, page);
 }
 
-void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3745_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 8 transfers of 18 bytes.
 
@@ -91,10 +117,10 @@ void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 18) {
 #if IS31FL3745_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3745_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT);
 #endif
     }
 }
@@ -102,58 +128,46 @@ void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3745_init_drivers(void) {
     i2c_init();
 
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_1, IS31FL3745_SYNC_1);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_2, IS31FL3745_SYNC_2);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_3, IS31FL3745_SYNC_3);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_4, IS31FL3745_SYNC_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
+        is31fl3745_init(i);
+    }
 
     for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
         is31fl3745_set_scaling_register(i, 0xFF, 0xFF, 0xFF);
     }
 
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
+        is31fl3745_update_scaling_registers(i);
+    }
 }
 
-void is31fl3745_init(uint8_t addr, uint8_t sync) {
+void is31fl3745_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+    is31fl3745_select_page(index, IS31FL3745_COMMAND_SCALING);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
-        is31fl3745_write_register(addr, i + 1, 0x00);
+        is31fl3745_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+    is31fl3745_select_page(index, IS31FL3745_COMMAND_PWM);
 
     for (uint8_t i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i++) {
-        is31fl3745_write_register(addr, i + 1, 0x00);
+        is31fl3745_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_FUNCTION);
+    is31fl3745_select_page(index, IS31FL3745_COMMAND_FUNCTION);
 
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
+    uint8_t sync = driver_sync[index];
+
+    is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
+    is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
+    is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
+    is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -192,22 +206,22 @@ void is31fl3745_set_scaling_register(uint8_t index, uint8_t red, uint8_t green,
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3745_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+        is31fl3745_select_page(index, IS31FL3745_COMMAND_PWM);
 
-        is31fl3745_write_pwm_buffer(addr, index);
+        is31fl3745_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index) {
+void is31fl3745_update_scaling_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+        is31fl3745_select_page(index, IS31FL3745_COMMAND_SCALING);
 
         for (uint8_t i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
-            is31fl3745_write_register(addr, i + 1, g_scaling_registers[index][i]);
+            is31fl3745_write_register(index, i + 1, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -215,14 +229,7 @@ void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3745_flush(void) {
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
+        is31fl3745_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3745.h b/drivers/led/issi/is31fl3745.h
index 3c67f7ecc7..264f4f9c74 100644
--- a/drivers/led/issi/is31fl3745.h
+++ b/drivers/led/issi/is31fl3745.h
@@ -84,17 +84,17 @@ typedef struct is31fl3745_led_t {
 extern const is31fl3745_led_t PROGMEM g_is31fl3745_leds[IS31FL3745_LED_COUNT];
 
 void is31fl3745_init_drivers(void);
-void is31fl3745_init(uint8_t addr, uint8_t sync);
-void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3745_select_page(uint8_t addr, uint8_t page);
+void is31fl3745_init(uint8_t index);
+void is31fl3745_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3745_select_page(uint8_t index, uint8_t page);
 
 void is31fl3745_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3745_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
 
 void is31fl3745_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue);
 
-void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index);
+void is31fl3745_update_pwm_buffers(uint8_t index);
+void is31fl3745_update_scaling_registers(uint8_t index);
 
 void is31fl3745_flush(void);
 
diff --git a/drivers/led/issi/is31fl3746a-mono.c b/drivers/led/issi/is31fl3746a-mono.c
index c21269b3a3..900482e75c 100644
--- a/drivers/led/issi/is31fl3746a-mono.c
+++ b/drivers/led/issi/is31fl3746a-mono.c
@@ -53,28 +53,41 @@
 #    define IS31FL3746A_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3746A_DRIVER_COUNT] = {
+    IS31FL3746A_I2C_ADDRESS_1,
+#ifdef IS31FL3746A_I2C_ADDRESS_2
+    IS31FL3746A_I2C_ADDRESS_2,
+#    ifdef IS31FL3746A_I2C_ADDRESS_3
+    IS31FL3746A_I2C_ADDRESS_3,
+#        ifdef IS31FL3746A_I2C_ADDRESS_4
+    IS31FL3746A_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 uint8_t g_pwm_buffer[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_PWM_REGISTER_COUNT];
 bool    g_pwm_buffer_update_required[IS31FL3746A_DRIVER_COUNT]        = {false};
 bool    g_scaling_registers_update_required[IS31FL3746A_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_SCALING_REGISTER_COUNT];
 
-void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3746a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3746A_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3746A_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3746a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3746a_write_register(addr, IS31FL3746A_REG_COMMAND_WRITE_LOCK, IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3746a_write_register(addr, IS31FL3746A_REG_COMMAND, page);
+void is31fl3746a_select_page(uint8_t index, uint8_t page) {
+    is31fl3746a_write_register(index, IS31FL3746A_REG_COMMAND_WRITE_LOCK, IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3746a_write_register(index, IS31FL3746A_REG_COMMAND, page);
 }
 
-void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3746a_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 4 transfers of 18 bytes.
 
@@ -82,10 +95,10 @@ void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i += 18) {
 #if IS31FL3746A_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3746A_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT);
 #endif
     }
 }
@@ -93,59 +106,45 @@ void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3746a_init_drivers(void) {
     i2c_init();
 
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_1);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_2);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_3);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
+        is31fl3746a_init(i);
+    }
 
     for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
         is31fl3746a_set_scaling_register(i, 0xFF);
     }
 
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
+        is31fl3746a_update_scaling_registers(i);
+    }
 }
 
-void is31fl3746a_init(uint8_t addr) {
+void is31fl3746a_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_SCALING);
+    is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3746a_write_register(addr, i + 1, 0x00);
+        is31fl3746a_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_PWM);
+    is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);
 
     for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i++) {
-        is31fl3746a_write_register(addr, i + 1, 0x00);
+        is31fl3746a_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_FUNCTION);
+    is31fl3746a_select_page(index, IS31FL3746A_COMMAND_FUNCTION);
 
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PULLDOWNUP, (IS31FL3746A_SW_PULLDOWN << 4) | IS31FL3746A_CS_PULLUP);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3746A_GLOBAL_CURRENT);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PWM_ENABLE, 0x01);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY, IS31FL3746A_PWM_FREQUENCY);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_CONFIGURATION, IS31FL3746A_CONFIGURATION);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PULLDOWNUP, (IS31FL3746A_SW_PULLDOWN << 4) | IS31FL3746A_CS_PULLUP);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3746A_GLOBAL_CURRENT);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PWM_ENABLE, 0x01);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY, IS31FL3746A_PWM_FREQUENCY);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_CONFIGURATION, IS31FL3746A_CONFIGURATION);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -180,22 +179,22 @@ void is31fl3746a_set_scaling_register(uint8_t index, uint8_t value) {
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3746a_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_PWM);
+        is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);
 
-        is31fl3746a_write_pwm_buffer(addr, index);
+        is31fl3746a_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index) {
+void is31fl3746a_update_scaling_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_SCALING);
+        is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);
 
         for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3746a_write_register(addr, i + 1, g_scaling_registers[index][i]);
+            is31fl3746a_write_register(index, i + 1, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -203,14 +202,7 @@ void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3746a_flush(void) {
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
+        is31fl3746a_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3746a-mono.h b/drivers/led/issi/is31fl3746a-mono.h
index 002a91f175..1fa1a1e520 100644
--- a/drivers/led/issi/is31fl3746a-mono.h
+++ b/drivers/led/issi/is31fl3746a-mono.h
@@ -84,17 +84,17 @@ typedef struct is31fl3746a_led_t {
 extern const is31fl3746a_led_t PROGMEM g_is31fl3746a_leds[IS31FL3746A_LED_COUNT];
 
 void is31fl3746a_init_drivers(void);
-void is31fl3746a_init(uint8_t addr);
-void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3746a_select_page(uint8_t addr, uint8_t page);
+void is31fl3746a_init(uint8_t index);
+void is31fl3746a_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3746a_select_page(uint8_t index, uint8_t page);
 
 void is31fl3746a_set_value(int index, uint8_t value);
 void is31fl3746a_set_value_all(uint8_t value);
 
 void is31fl3746a_set_scaling_register(uint8_t index, uint8_t value);
 
-void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index);
+void is31fl3746a_update_pwm_buffers(uint8_t index);
+void is31fl3746a_update_scaling_registers(uint8_t index);
 
 void is31fl3746a_flush(void);
 
diff --git a/drivers/led/issi/is31fl3746a.c b/drivers/led/issi/is31fl3746a.c
index d167cdd90b..b4de9add6f 100644
--- a/drivers/led/issi/is31fl3746a.c
+++ b/drivers/led/issi/is31fl3746a.c
@@ -53,28 +53,41 @@
 #    define IS31FL3746A_GLOBAL_CURRENT 0xFF
 #endif
 
+const uint8_t i2c_addresses[IS31FL3746A_DRIVER_COUNT] = {
+    IS31FL3746A_I2C_ADDRESS_1,
+#ifdef IS31FL3746A_I2C_ADDRESS_2
+    IS31FL3746A_I2C_ADDRESS_2,
+#    ifdef IS31FL3746A_I2C_ADDRESS_3
+    IS31FL3746A_I2C_ADDRESS_3,
+#        ifdef IS31FL3746A_I2C_ADDRESS_4
+    IS31FL3746A_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 uint8_t g_pwm_buffer[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_PWM_REGISTER_COUNT];
 bool    g_pwm_buffer_update_required[IS31FL3746A_DRIVER_COUNT]        = {false};
 bool    g_scaling_registers_update_required[IS31FL3746A_DRIVER_COUNT] = {false};
 
 uint8_t g_scaling_registers[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_SCALING_REGISTER_COUNT];
 
-void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void is31fl3746a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if IS31FL3746A_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < IS31FL3746A_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT);
 #endif
 }
 
-void is31fl3746a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3746a_write_register(addr, IS31FL3746A_REG_COMMAND_WRITE_LOCK, IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3746a_write_register(addr, IS31FL3746A_REG_COMMAND, page);
+void is31fl3746a_select_page(uint8_t index, uint8_t page) {
+    is31fl3746a_write_register(index, IS31FL3746A_REG_COMMAND_WRITE_LOCK, IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3746a_write_register(index, IS31FL3746A_REG_COMMAND, page);
 }
 
-void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void is31fl3746a_write_pwm_buffer(uint8_t index) {
     // Assumes page 0 is already selected.
     // Transmit PWM registers in 4 transfers of 18 bytes.
 
@@ -82,10 +95,10 @@ void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i += 18) {
 #if IS31FL3746A_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < IS31FL3746A_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3746A_I2C_TIMEOUT);
 #endif
     }
 }
@@ -93,59 +106,45 @@ void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void is31fl3746a_init_drivers(void) {
     i2c_init();
 
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_1);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_2);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_3);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
+        is31fl3746a_init(i);
+    }
 
     for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
         is31fl3746a_set_scaling_register(i, 0xFF, 0xFF, 0xFF);
     }
 
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
+        is31fl3746a_update_scaling_registers(i);
+    }
 }
 
-void is31fl3746a_init(uint8_t addr) {
+void is31fl3746a_init(uint8_t index) {
     // In order to avoid the LEDs being driven with garbage data
     // in the LED driver's PWM registers, shutdown is enabled last.
     // Set up the mode and other settings, clear the PWM registers,
     // then disable software shutdown.
 
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_SCALING);
+    is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);
 
     // Turn off all LEDs.
     for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3746a_write_register(addr, i + 1, 0x00);
+        is31fl3746a_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_PWM);
+    is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);
 
     for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i++) {
-        is31fl3746a_write_register(addr, i + 1, 0x00);
+        is31fl3746a_write_register(index, i + 1, 0x00);
     }
 
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_FUNCTION);
+    is31fl3746a_select_page(index, IS31FL3746A_COMMAND_FUNCTION);
 
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PULLDOWNUP, (IS31FL3746A_SW_PULLDOWN << 4) | IS31FL3746A_CS_PULLUP);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3746A_GLOBAL_CURRENT);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PWM_ENABLE, 0x01);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY, IS31FL3746A_PWM_FREQUENCY);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_CONFIGURATION, IS31FL3746A_CONFIGURATION);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PULLDOWNUP, (IS31FL3746A_SW_PULLDOWN << 4) | IS31FL3746A_CS_PULLUP);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3746A_GLOBAL_CURRENT);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PWM_ENABLE, 0x01);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY, IS31FL3746A_PWM_FREQUENCY);
+    is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_CONFIGURATION, IS31FL3746A_CONFIGURATION);
 
     // Wait 10ms to ensure the device has woken up.
     wait_ms(10);
@@ -184,22 +183,22 @@ void is31fl3746a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green,
     g_scaling_registers_update_required[led.driver] = true;
 }
 
-void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void is31fl3746a_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_PWM);
+        is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);
 
-        is31fl3746a_write_pwm_buffer(addr, index);
+        is31fl3746a_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index) {
+void is31fl3746a_update_scaling_registers(uint8_t index) {
     if (g_scaling_registers_update_required[index]) {
-        is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_SCALING);
+        is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);
 
         for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3746a_write_register(addr, i + 1, g_scaling_registers[index][i]);
+            is31fl3746a_write_register(index, i + 1, g_scaling_registers[index][i]);
         }
 
         g_scaling_registers_update_required[index] = false;
@@ -207,14 +206,7 @@ void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index) {
 }
 
 void is31fl3746a_flush(void) {
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
+        is31fl3746a_update_pwm_buffers(i);
+    }
 }
diff --git a/drivers/led/issi/is31fl3746a.h b/drivers/led/issi/is31fl3746a.h
index 32647a37bd..e3ea2b7bb7 100644
--- a/drivers/led/issi/is31fl3746a.h
+++ b/drivers/led/issi/is31fl3746a.h
@@ -86,17 +86,17 @@ typedef struct is31fl3746a_led_t {
 extern const is31fl3746a_led_t PROGMEM g_is31fl3746a_leds[IS31FL3746A_LED_COUNT];
 
 void is31fl3746a_init_drivers(void);
-void is31fl3746a_init(uint8_t addr);
-void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3746a_select_page(uint8_t addr, uint8_t page);
+void is31fl3746a_init(uint8_t index);
+void is31fl3746a_write_register(uint8_t index, uint8_t reg, uint8_t data);
+void is31fl3746a_select_page(uint8_t index, uint8_t page);
 
 void is31fl3746a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void is31fl3746a_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
 
 void is31fl3746a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue);
 
-void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index);
+void is31fl3746a_update_pwm_buffers(uint8_t index);
+void is31fl3746a_update_scaling_registers(uint8_t index);
 
 void is31fl3746a_flush(void);
 
diff --git a/drivers/led/snled27351-mono.c b/drivers/led/snled27351-mono.c
index 854d21d3dc..8893e83537 100644
--- a/drivers/led/snled27351-mono.c
+++ b/drivers/led/snled27351-mono.c
@@ -37,6 +37,19 @@
         { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }
 #endif
 
+const uint8_t i2c_addresses[SNLED27351_DRIVER_COUNT] = {
+    SNLED27351_I2C_ADDRESS_1,
+#ifdef SNLED27351_I2C_ADDRESS_2
+    SNLED27351_I2C_ADDRESS_2,
+#    ifdef SNLED27351_I2C_ADDRESS_3
+    SNLED27351_I2C_ADDRESS_3,
+#        ifdef SNLED27351_I2C_ADDRESS_4
+    SNLED27351_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the SNLED27351 PWM registers.
 // The control buffers match the PG0 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -49,21 +62,21 @@ bool    g_pwm_buffer_update_required[SNLED27351_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[SNLED27351_DRIVER_COUNT][SNLED27351_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[SNLED27351_DRIVER_COUNT]                        = {false};
 
-void snled27351_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void snled27351_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if SNLED27351_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < SNLED27351_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, SNLED27351_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, SNLED27351_I2C_TIMEOUT);
 #endif
 }
 
-void snled27351_select_page(uint8_t addr, uint8_t page) {
-    snled27351_write_register(addr, SNLED27351_REG_COMMAND, page);
+void snled27351_select_page(uint8_t index, uint8_t page) {
+    snled27351_write_register(index, SNLED27351_REG_COMMAND, page);
 }
 
-void snled27351_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void snled27351_write_pwm_buffer(uint8_t index) {
     // Assumes PG1 is already selected.
     // Transmit PWM registers in 12 transfers of 16 bytes.
 
@@ -71,10 +84,10 @@ void snled27351_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < SNLED27351_PWM_REGISTER_COUNT; i += 16) {
 #if SNLED27351_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < SNLED27351_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT);
 #endif
     }
 }
@@ -82,78 +95,64 @@ void snled27351_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void snled27351_init_drivers(void) {
     i2c_init();
 
-    snled27351_init(SNLED27351_I2C_ADDRESS_1);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_init(SNLED27351_I2C_ADDRESS_2);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_init(SNLED27351_I2C_ADDRESS_3);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_init(SNLED27351_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < SNLED27351_DRIVER_COUNT; i++) {
+        snled27351_init(i);
+    }
 
     for (int i = 0; i < SNLED27351_LED_COUNT; i++) {
         snled27351_set_led_control_register(i, true);
     }
 
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_1, 0);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_2, 1);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_3, 2);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < SNLED27351_DRIVER_COUNT; i++) {
+        snled27351_update_led_control_registers(i);
+    }
 }
 
-void snled27351_init(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+void snled27351_init(uint8_t index) {
+    snled27351_select_page(index, SNLED27351_COMMAND_FUNCTION);
 
     // Setting LED driver to shutdown mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
     // Setting internal channel pulldown/pullup
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_PULLDOWNUP, SNLED27351_PULLDOWNUP_ALL_ENABLED);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_PULLDOWNUP, SNLED27351_PULLDOWNUP_ALL_ENABLED);
     // Select number of scan phase
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SCAN_PHASE, SNLED27351_PHASE_CHANNEL);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SCAN_PHASE, SNLED27351_PHASE_CHANNEL);
     // Setting PWM Delay Phase
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_1, SNLED27351_SLEW_RATE_CONTROL_MODE_1_PDP_ENABLE);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_1, SNLED27351_SLEW_RATE_CONTROL_MODE_1_PDP_ENABLE);
     // Setting Driving/Sinking Channel Slew Rate
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_2, SNLED27351_SLEW_RATE_CONTROL_MODE_2_DSL_ENABLE | SNLED27351_SLEW_RATE_CONTROL_MODE_2_SSL_ENABLE);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_2, SNLED27351_SLEW_RATE_CONTROL_MODE_2_DSL_ENABLE | SNLED27351_SLEW_RATE_CONTROL_MODE_2_SSL_ENABLE);
     // Setting Iref
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, 0);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, 0);
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+    snled27351_select_page(index, SNLED27351_COMMAND_LED_CONTROL);
 
     for (int i = 0; i < SNLED27351_LED_CONTROL_ON_OFF_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0x00);
+        snled27351_write_register(index, i, 0x00);
     }
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_PWM);
+    snled27351_select_page(index, SNLED27351_COMMAND_PWM);
 
     for (int i = 0; i < SNLED27351_LED_CURRENT_TUNE_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0x00);
+        snled27351_write_register(index, i, 0x00);
     }
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_CURRENT_TUNE);
+    snled27351_select_page(index, SNLED27351_COMMAND_CURRENT_TUNE);
 
     uint8_t current_tune_reg_list[SNLED27351_LED_CURRENT_TUNE_LENGTH] = SNLED27351_CURRENT_TUNE;
     for (int i = 0; i < SNLED27351_LED_CURRENT_TUNE_LENGTH; i++) {
-        snled27351_write_register(addr, i, current_tune_reg_list[i]);
+        snled27351_write_register(index, i, current_tune_reg_list[i]);
     }
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+    snled27351_select_page(index, SNLED27351_COMMAND_LED_CONTROL);
 
     for (int i = 0; i < SNLED27351_LED_CONTROL_ON_OFF_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0xFF);
+        snled27351_write_register(index, i, 0xFF);
     }
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+    snled27351_select_page(index, SNLED27351_COMMAND_FUNCTION);
 
     // Setting LED driver to normal mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
 }
 
 void snled27351_set_value(int index, uint8_t value) {
@@ -192,22 +191,22 @@ void snled27351_set_led_control_register(uint8_t index, bool value) {
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void snled27351_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void snled27351_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        snled27351_select_page(addr, SNLED27351_COMMAND_PWM);
+        snled27351_select_page(index, SNLED27351_COMMAND_PWM);
 
-        snled27351_write_pwm_buffer(addr, index);
+        snled27351_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void snled27351_update_led_control_registers(uint8_t addr, uint8_t index) {
+void snled27351_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
-        snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+        snled27351_select_page(index, SNLED27351_COMMAND_LED_CONTROL);
 
         for (uint8_t i = 0; i < SNLED27351_LED_CONTROL_REGISTER_COUNT; i++) {
-            snled27351_write_register(addr, i, g_led_control_registers[index][i]);
+            snled27351_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -215,30 +214,23 @@ void snled27351_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void snled27351_flush(void) {
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_1, 0);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_2, 1);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_3, 2);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < SNLED27351_DRIVER_COUNT; i++) {
+        snled27351_update_pwm_buffers(i);
+    }
 }
 
-void snled27351_sw_return_normal(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+void snled27351_sw_return_normal(uint8_t index) {
+    snled27351_select_page(index, SNLED27351_COMMAND_FUNCTION);
 
     // Setting LED driver to normal mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
 }
 
-void snled27351_sw_shutdown(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+void snled27351_sw_shutdown(uint8_t index) {
+    snled27351_select_page(index, SNLED27351_COMMAND_FUNCTION);
 
     // Setting LED driver to shutdown mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
     // Write SW Sleep Register
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, SNLED27351_SOFTWARE_SLEEP_ENABLE);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, SNLED27351_SOFTWARE_SLEEP_ENABLE);
 }
diff --git a/drivers/led/snled27351-mono.h b/drivers/led/snled27351-mono.h
index 3a22115623..a5f3c3578c 100644
--- a/drivers/led/snled27351-mono.h
+++ b/drivers/led/snled27351-mono.h
@@ -154,9 +154,9 @@ typedef struct snled27351_led_t {
 extern const snled27351_led_t PROGMEM g_snled27351_leds[SNLED27351_LED_COUNT];
 
 void snled27351_init_drivers(void);
-void snled27351_init(uint8_t addr);
-void snled27351_select_page(uint8_t addr, uint8_t page);
-void snled27351_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void snled27351_init(uint8_t index);
+void snled27351_select_page(uint8_t index, uint8_t page);
+void snled27351_write_register(uint8_t index, uint8_t reg, uint8_t data);
 
 void snled27351_set_value(int index, uint8_t value);
 void snled27351_set_value_all(uint8_t value);
@@ -167,13 +167,13 @@ void snled27351_set_led_control_register(uint8_t index, bool value);
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void snled27351_update_pwm_buffers(uint8_t addr, uint8_t index);
-void snled27351_update_led_control_registers(uint8_t addr, uint8_t index);
+void snled27351_update_pwm_buffers(uint8_t index);
+void snled27351_update_led_control_registers(uint8_t index);
 
 void snled27351_flush(void);
 
-void snled27351_sw_return_normal(uint8_t addr);
-void snled27351_sw_shutdown(uint8_t addr);
+void snled27351_sw_return_normal(uint8_t index);
+void snled27351_sw_shutdown(uint8_t index);
 
 #define A_1 0x00
 #define A_2 0x01
diff --git a/drivers/led/snled27351.c b/drivers/led/snled27351.c
index 662335afd2..31b69de388 100644
--- a/drivers/led/snled27351.c
+++ b/drivers/led/snled27351.c
@@ -37,6 +37,19 @@
         { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }
 #endif
 
+const uint8_t i2c_addresses[SNLED27351_DRIVER_COUNT] = {
+    SNLED27351_I2C_ADDRESS_1,
+#ifdef SNLED27351_I2C_ADDRESS_2
+    SNLED27351_I2C_ADDRESS_2,
+#    ifdef SNLED27351_I2C_ADDRESS_3
+    SNLED27351_I2C_ADDRESS_3,
+#        ifdef SNLED27351_I2C_ADDRESS_4
+    SNLED27351_I2C_ADDRESS_4,
+#        endif
+#    endif
+#endif
+};
+
 // These buffers match the SNLED27351 PWM registers.
 // The control buffers match the PG0 LED On/Off registers.
 // Storing them like this is optimal for I2C transfers to the registers.
@@ -49,21 +62,21 @@ bool    g_pwm_buffer_update_required[SNLED27351_DRIVER_COUNT] = {false};
 uint8_t g_led_control_registers[SNLED27351_DRIVER_COUNT][SNLED27351_LED_CONTROL_REGISTER_COUNT] = {0};
 bool    g_led_control_registers_update_required[SNLED27351_DRIVER_COUNT]                        = {false};
 
-void snled27351_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+void snled27351_write_register(uint8_t index, uint8_t reg, uint8_t data) {
 #if SNLED27351_I2C_PERSISTENCE > 0
     for (uint8_t i = 0; i < SNLED27351_I2C_PERSISTENCE; i++) {
-        if (i2c_write_register(addr << 1, reg, &data, 1, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+        if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
     }
 #else
-    i2c_write_register(addr << 1, reg, &data, 1, SNLED27351_I2C_TIMEOUT);
+    i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, SNLED27351_I2C_TIMEOUT);
 #endif
 }
 
-void snled27351_select_page(uint8_t addr, uint8_t page) {
-    snled27351_write_register(addr, SNLED27351_REG_COMMAND, page);
+void snled27351_select_page(uint8_t index, uint8_t page) {
+    snled27351_write_register(index, SNLED27351_REG_COMMAND, page);
 }
 
-void snled27351_write_pwm_buffer(uint8_t addr, uint8_t index) {
+void snled27351_write_pwm_buffer(uint8_t index) {
     // Assumes PG1 is already selected.
     // Transmit PWM registers in 12 transfers of 16 bytes.
 
@@ -71,10 +84,10 @@ void snled27351_write_pwm_buffer(uint8_t addr, uint8_t index) {
     for (uint8_t i = 0; i < SNLED27351_PWM_REGISTER_COUNT; i += 16) {
 #if SNLED27351_I2C_PERSISTENCE > 0
         for (uint8_t j = 0; j < SNLED27351_I2C_PERSISTENCE; j++) {
-            if (i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
+            if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
         }
 #else
-        i2c_write_register(addr << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT);
+        i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 16, SNLED27351_I2C_TIMEOUT);
 #endif
     }
 }
@@ -82,78 +95,64 @@ void snled27351_write_pwm_buffer(uint8_t addr, uint8_t index) {
 void snled27351_init_drivers(void) {
     i2c_init();
 
-    snled27351_init(SNLED27351_I2C_ADDRESS_1);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_init(SNLED27351_I2C_ADDRESS_2);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_init(SNLED27351_I2C_ADDRESS_3);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_init(SNLED27351_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < SNLED27351_DRIVER_COUNT; i++) {
+        snled27351_init(i);
+    }
 
     for (int i = 0; i < SNLED27351_LED_COUNT; i++) {
         snled27351_set_led_control_register(i, true, true, true);
     }
 
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_1, 0);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_2, 1);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_3, 2);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < SNLED27351_DRIVER_COUNT; i++) {
+        snled27351_update_led_control_registers(i);
+    }
 }
 
-void snled27351_init(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+void snled27351_init(uint8_t index) {
+    snled27351_select_page(index, SNLED27351_COMMAND_FUNCTION);
 
     // Setting LED driver to shutdown mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
     // Setting internal channel pulldown/pullup
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_PULLDOWNUP, SNLED27351_PULLDOWNUP_ALL_ENABLED);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_PULLDOWNUP, SNLED27351_PULLDOWNUP_ALL_ENABLED);
     // Select number of scan phase
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SCAN_PHASE, SNLED27351_PHASE_CHANNEL);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SCAN_PHASE, SNLED27351_PHASE_CHANNEL);
     // Setting PWM Delay Phase
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_1, SNLED27351_SLEW_RATE_CONTROL_MODE_1_PDP_ENABLE);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_1, SNLED27351_SLEW_RATE_CONTROL_MODE_1_PDP_ENABLE);
     // Setting Driving/Sinking Channel Slew Rate
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_2, SNLED27351_SLEW_RATE_CONTROL_MODE_2_DSL_ENABLE | SNLED27351_SLEW_RATE_CONTROL_MODE_2_SSL_ENABLE);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_2, SNLED27351_SLEW_RATE_CONTROL_MODE_2_DSL_ENABLE | SNLED27351_SLEW_RATE_CONTROL_MODE_2_SSL_ENABLE);
     // Setting Iref
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, 0);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, 0);
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+    snled27351_select_page(index, SNLED27351_COMMAND_LED_CONTROL);
 
     for (int i = 0; i < SNLED27351_LED_CONTROL_ON_OFF_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0x00);
+        snled27351_write_register(index, i, 0x00);
     }
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_PWM);
+    snled27351_select_page(index, SNLED27351_COMMAND_PWM);
 
     for (int i = 0; i < SNLED27351_LED_CURRENT_TUNE_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0x00);
+        snled27351_write_register(index, i, 0x00);
     }
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_CURRENT_TUNE);
+    snled27351_select_page(index, SNLED27351_COMMAND_CURRENT_TUNE);
 
     uint8_t current_tune_reg_list[SNLED27351_LED_CURRENT_TUNE_LENGTH] = SNLED27351_CURRENT_TUNE;
     for (int i = 0; i < SNLED27351_LED_CURRENT_TUNE_LENGTH; i++) {
-        snled27351_write_register(addr, i, current_tune_reg_list[i]);
+        snled27351_write_register(index, i, current_tune_reg_list[i]);
     }
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+    snled27351_select_page(index, SNLED27351_COMMAND_LED_CONTROL);
 
     for (int i = 0; i < SNLED27351_LED_CONTROL_ON_OFF_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0xFF);
+        snled27351_write_register(index, i, 0xFF);
     }
 
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+    snled27351_select_page(index, SNLED27351_COMMAND_FUNCTION);
 
     // Setting LED driver to normal mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
 }
 
 void snled27351_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
@@ -208,22 +207,22 @@ void snled27351_set_led_control_register(uint8_t index, bool red, bool green, bo
     g_led_control_registers_update_required[led.driver] = true;
 }
 
-void snled27351_update_pwm_buffers(uint8_t addr, uint8_t index) {
+void snled27351_update_pwm_buffers(uint8_t index) {
     if (g_pwm_buffer_update_required[index]) {
-        snled27351_select_page(addr, SNLED27351_COMMAND_PWM);
+        snled27351_select_page(index, SNLED27351_COMMAND_PWM);
 
-        snled27351_write_pwm_buffer(addr, index);
+        snled27351_write_pwm_buffer(index);
 
         g_pwm_buffer_update_required[index] = false;
     }
 }
 
-void snled27351_update_led_control_registers(uint8_t addr, uint8_t index) {
+void snled27351_update_led_control_registers(uint8_t index) {
     if (g_led_control_registers_update_required[index]) {
-        snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+        snled27351_select_page(index, SNLED27351_COMMAND_LED_CONTROL);
 
         for (uint8_t i = 0; i < SNLED27351_LED_CONTROL_REGISTER_COUNT; i++) {
-            snled27351_write_register(addr, i, g_led_control_registers[index][i]);
+            snled27351_write_register(index, i, g_led_control_registers[index][i]);
         }
 
         g_led_control_registers_update_required[index] = false;
@@ -231,30 +230,23 @@ void snled27351_update_led_control_registers(uint8_t addr, uint8_t index) {
 }
 
 void snled27351_flush(void) {
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_1, 0);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_2, 1);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_3, 2);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
+    for (uint8_t i = 0; i < SNLED27351_DRIVER_COUNT; i++) {
+        snled27351_update_pwm_buffers(i);
+    }
 }
 
-void snled27351_sw_return_normal(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+void snled27351_sw_return_normal(uint8_t index) {
+    snled27351_select_page(index, SNLED27351_COMMAND_FUNCTION);
 
     // Setting LED driver to normal mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
 }
 
-void snled27351_sw_shutdown(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+void snled27351_sw_shutdown(uint8_t index) {
+    snled27351_select_page(index, SNLED27351_COMMAND_FUNCTION);
 
     // Setting LED driver to shutdown mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
     // Write SW Sleep Register
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, SNLED27351_SOFTWARE_SLEEP_ENABLE);
+    snled27351_write_register(index, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, SNLED27351_SOFTWARE_SLEEP_ENABLE);
 }
diff --git a/drivers/led/snled27351.h b/drivers/led/snled27351.h
index 4b811719d9..79d601ca2d 100644
--- a/drivers/led/snled27351.h
+++ b/drivers/led/snled27351.h
@@ -168,9 +168,9 @@ typedef struct snled27351_led_t {
 extern const snled27351_led_t PROGMEM g_snled27351_leds[SNLED27351_LED_COUNT];
 
 void snled27351_init_drivers(void);
-void snled27351_init(uint8_t addr);
-void snled27351_select_page(uint8_t addr, uint8_t page);
-void snled27351_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void snled27351_init(uint8_t index);
+void snled27351_select_page(uint8_t index, uint8_t page);
+void snled27351_write_register(uint8_t index, uint8_t reg, uint8_t data);
 
 void snled27351_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
 void snled27351_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
@@ -181,13 +181,13 @@ void snled27351_set_led_control_register(uint8_t index, bool red, bool green, bo
 // (eg. from a timer interrupt).
 // Call this while idle (in between matrix scans).
 // If the buffer is dirty, it will update the driver with the buffer.
-void snled27351_update_pwm_buffers(uint8_t addr, uint8_t index);
-void snled27351_update_led_control_registers(uint8_t addr, uint8_t index);
+void snled27351_update_pwm_buffers(uint8_t index);
+void snled27351_update_led_control_registers(uint8_t index);
 
 void snled27351_flush(void);
 
-void snled27351_sw_return_normal(uint8_t addr);
-void snled27351_sw_shutdown(uint8_t addr);
+void snled27351_sw_return_normal(uint8_t index);
+void snled27351_sw_shutdown(uint8_t index);
 
 #define A_1 0x00
 #define A_2 0x01