LED drivers: extract IS31FL3742A from IS31COMMON (#22620)

10 files changed, 816 insertions, 87 deletions

diff --git a/builddefs/common_features.mk b/builddefs/common_features.mk
index 5e93480e4d..f049b09247 100644
--- a/builddefs/common_features.mk
+++ b/builddefs/common_features.mk
@@ -396,10 +396,9 @@ ifeq ($(strip $(LED_MATRIX_ENABLE)), yes)
     endif
 
     ifeq ($(strip $(LED_MATRIX_DRIVER)), is31fl3742a)
-        OPT_DEFS += -DIS31FLCOMMON
         I2C_DRIVER_REQUIRED = yes
         COMMON_VPATH += $(DRIVER_PATH)/led/issi
-        SRC += is31flcommon.c
+        SRC += is31fl3742a-simple.c
     endif
 
     ifeq ($(strip $(LED_MATRIX_DRIVER)), is31fl3743a)
@@ -503,10 +502,9 @@ ifeq ($(strip $(RGB_MATRIX_ENABLE)), yes)
     endif
 
     ifeq ($(strip $(RGB_MATRIX_DRIVER)), is31fl3742a)
-        OPT_DEFS += -DIS31FLCOMMON
         I2C_DRIVER_REQUIRED = yes
         COMMON_VPATH += $(DRIVER_PATH)/led/issi
-        SRC += is31flcommon.c
+        SRC += is31fl3742a.c
     endif
 
     ifeq ($(strip $(RGB_MATRIX_DRIVER)), is31fl3743a)
diff --git a/drivers/led/issi/is31fl3742a-simple.c b/drivers/led/issi/is31fl3742a-simple.c
new file mode 100644
index 0000000000..ee6e8741b9
--- /dev/null
+++ b/drivers/led/issi/is31fl3742a-simple.c
@@ -0,0 +1,206 @@
+#include "is31fl3742a-simple.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3742A_PWM_REGISTER_COUNT 180
+#define IS31FL3742A_SCALING_REGISTER_COUNT 180
+
+#ifndef IS31FL3742A_I2C_TIMEOUT
+#    define IS31FL3742A_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3742A_I2C_PERSISTENCE
+#    define IS31FL3742A_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3742A_CONFIGURATION
+#    define IS31FL3742A_CONFIGURATION 0x31
+#endif
+
+#ifndef IS31FL3742A_PWM_FREQUENCY
+#    define IS31FL3742A_PWM_FREQUENCY IS31FL3742A_PWM_FREQUENCY_29K_HZ
+#endif
+
+#ifndef IS31FL3742A_SW_PULLDOWN
+#    define IS31FL3742A_SW_PULLDOWN IS31FL3742A_PDR_8K_OHM
+#endif
+
+#ifndef IS31FL3742A_CS_PULLUP
+#    define IS31FL3742A_CS_PULLUP IS31FL3742A_PUR_8K_OHM
+#endif
+
+#ifndef IS31FL3742A_GLOBAL_CURRENT
+#    define IS31FL3742A_GLOBAL_CURRENT 0xFF
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+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) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3742A_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3742A_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, 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_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 0 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3742A_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT) != 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT);
+#endif
+    }
+}
+
+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 (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
+}
+
+void is31fl3742a_init(uint8_t addr) {
+    // 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);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
+        is31fl3742a_write_register(addr, i, 0x00);
+    }
+
+    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+
+    for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i++) {
+        is31fl3742a_write_register(addr, i, 0x00);
+    }
+
+    is31fl3742a_select_page(addr, 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);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3742a_set_value(int index, uint8_t value) {
+    is31fl3742a_led_t led;
+    if (index >= 0 && index < IS31FL3742A_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.v]          = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void is31fl3742a_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) {
+        is31fl3742a_set_value(i, value);
+    }
+}
+
+void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value) {
+    is31fl3742a_led_t led;
+    memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));
+
+    g_scaling_registers[led.driver][led.v] = value;
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+
+        is31fl3742a_write_pwm_buffer(addr, g_pwm_buffer[index]);
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
+
+        for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
+            is31fl3742a_write_register(addr, i, g_scaling_registers[index][i]);
+        }
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+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
+}
diff --git a/drivers/led/issi/is31fl3742.h b/drivers/led/issi/is31fl3742a-simple.h
index c96f12d0f1..04614e4f6e 100644
--- a/drivers/led/issi/is31fl3742.h
+++ b/drivers/led/issi/is31fl3742a-simple.h
@@ -20,98 +20,96 @@
 
 #pragma once
 
-// This is a 7-bit address, that gets left-shifted and bit 0
-// set to 0 for write, 1 for read (as per I2C protocol)
-// The address will vary depending on your wiring:
-// 00 <-> GND
-// 01 <-> SCL
-// 10 <-> SDA
-// 11 <-> VCC
-// ADDR represents A1:A0 of the 7-bit address.
-// The result is: 0b01100(ADDR)
-#ifndef DRIVER_ADDR_1
-#    define DRIVER_ADDR_1 0b0110000
-#endif
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
 
-// Command Registers
-#define ISSI_COMMANDREGISTER_WRITELOCK 0xFE
-#define ISSI_COMMANDREGISTER 0xFD
-#define ISSI_IDREGISTER 0xFC
-#define ISSI_REGISTER_UNLOCK 0xC5
+#define IS31FL3742A_REG_INTERRUPT_MASK 0xF0
+#define IS31FL3742A_REG_INTERRUPT_STATUS 0xF1
+#define IS31FL3742A_REG_ID 0xFC
 
-// Response Registers
-#define ISSI_PAGE_PWM 0x00
-#define ISSI_PAGE_SCALING 0x02
-#define ISSI_PAGE_FUNCTION 0x04
+#define IS31FL3742A_REG_COMMAND 0xFD
 
-// Registers under Function Register
-#define ISSI_REG_CONFIGURATION 0x00
-#define ISSI_REG_GLOBALCURRENT 0x01
-#define ISSI_REG_PULLDOWNUP 0x02
-#define ISSI_REG_SSR 0x41
-#define ISSI_REG_RESET 0x3F
-#define ISSI_REG_PWM_SET 0x36
+#define IS31FL3742A_COMMAND_PWM 0x00
+#define IS31FL3742A_COMMAND_SCALING 0x02
+#define IS31FL3742A_COMMAND_FUNCTION 0x04
 
-// Set defaults for Function Registers
-#ifndef ISSI_CONFIGURATION
-#    define ISSI_CONFIGURATION 0x31
-#endif
-#ifndef ISSI_GLOBALCURRENT
-#    define ISSI_GLOBALCURRENT 0xFF
-#endif
-#ifndef ISSI_PULLDOWNUP
-#    define ISSI_PULLDOWNUP 0x55
-#endif
-#ifndef ISSI_PWM_SET
-#    define ISSI_PWM_SET 0x00
-#endif
+#define IS31FL3742A_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3742A_FUNCTION_REG_PULLDOWNUP 0x02
+#define IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY 0x36
+#define IS31FL3742A_FUNCTION_REG_RESET 0x3F
+#define IS31FL3742A_FUNCTION_REG_SPREAD_SPECTRUM 0x41
 
-// Set defaults for Spread Spectrum Register
-#ifndef ISSI_SSR_1
-#    define ISSI_SSR_1 0x00
-#endif
-#ifndef ISSI_SSR_2
-#    define ISSI_SSR_2 0x00
-#endif
-#ifndef ISSI_SSR_3
-#    define ISSI_SSR_3 0x00
-#endif
-#ifndef ISSI_SSR_4
-#    define ISSI_SSR_4 0x00
-#endif
+#define IS31FL3742A_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC 0xC5
 
-// Set defaults for Scaling registers
-#ifndef ISSI_SCAL_RED
-#    define ISSI_SCAL_RED 0xFF
-#endif
-#ifndef ISSI_SCAL_BLUE
-#    define ISSI_SCAL_BLUE 0xFF
-#endif
-#ifndef ISSI_SCAL_GREEN
-#    define ISSI_SCAL_GREEN 0xFF
+#define IS31FL3742A_I2C_ADDRESS_GND 0x30
+#define IS31FL3742A_I2C_ADDRESS_SCL 0x31
+#define IS31FL3742A_I2C_ADDRESS_SDA 0x32
+#define IS31FL3742A_I2C_ADDRESS_VCC 0x33
+
+#if defined(LED_MATRIX_IS31FL3742A)
+#    define IS31FL3742A_LED_COUNT LED_MATRIX_LED_COUNT
 #endif
-#define ISSI_SCAL_RED_OFF 0x00
-#define ISSI_SCAL_GREEN_OFF 0x00
-#define ISSI_SCAL_BLUE_OFF 0x00
 
-#ifndef ISSI_SCAL_LED
-#    define ISSI_SCAL_LED 0xFF
+#if defined(IS31FL3742A_I2C_ADDRESS_4)
+#    define IS31FL3742A_DRIVER_COUNT 4
+#elif defined(IS31FL3742A_I2C_ADDRESS_3)
+#    define IS31FL3742A_DRIVER_COUNT 3
+#elif defined(IS31FL3742A_I2C_ADDRESS_2)
+#    define IS31FL3742A_DRIVER_COUNT 2
+#elif defined(IS31FL3742A_I2C_ADDRESS_1)
+#    define IS31FL3742A_DRIVER_COUNT 1
 #endif
-#define ISSI_SCAL_LED_OFF 0x00
 
-// Set buffer sizes
-#define ISSI_MAX_LEDS 180
-#define ISSI_SCALING_SIZE 180
-#define ISSI_PWM_TRF_SIZE 18
-#define ISSI_SCALING_TRF_SIZE 18
+typedef struct is31fl3742a_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED 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_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+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_flush(void);
+
+#define IS31FL3742A_PDR_0_OHM 0b000   // No pull-down resistor
+#define IS31FL3742A_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3742A_PDR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3742A_PDR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3742A_PDR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3742A_PDR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3742A_PDR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3742A_PDR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3742A_PUR_0_OHM 0b000   // No pull-up resistor
+#define IS31FL3742A_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3742A_PUR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3742A_PUR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3742A_PUR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3742A_PUR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3742A_PUR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3742A_PUR_32K_OHM 0b111 // 32 kOhm resistor
 
-// Location of 1st bit for PWM and Scaling registers
-#define ISSI_PWM_REG_1ST 0x00
-#define ISSI_SCL_REG_1ST 0x00
+#define IS31FL3742A_PWM_FREQUENCY_29K_HZ 0b0000
+#define IS31FL3742A_PWM_FREQUENCY_3K6_HZ 0b0011
+#define IS31FL3742A_PWM_FREQUENCY_1K8_HZ 0b0111
+#define IS31FL3742A_PWM_FREQUENCY_900_HZ 0b1011
 
-// Map CS SW locations to order in PWM / Scaling buffers
-// This matches the ORDER in the Datasheet Register not the POSITION
-// It will always count from 0x00 to (ISSI_MAX_LEDS - 1)
 #define CS1_SW1 0x00
 #define CS2_SW1 0x01
 #define CS3_SW1 0x02
diff --git a/drivers/led/issi/is31fl3742a.c b/drivers/led/issi/is31fl3742a.c
new file mode 100644
index 0000000000..766ba0ba34
--- /dev/null
+++ b/drivers/led/issi/is31fl3742a.c
@@ -0,0 +1,210 @@
+#include "is31fl3742a.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3742A_PWM_REGISTER_COUNT 180
+#define IS31FL3742A_SCALING_REGISTER_COUNT 180
+
+#ifndef IS31FL3742A_I2C_TIMEOUT
+#    define IS31FL3742A_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3742A_I2C_PERSISTENCE
+#    define IS31FL3742A_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3742A_CONFIGURATION
+#    define IS31FL3742A_CONFIGURATION 0x31
+#endif
+
+#ifndef IS31FL3742A_PWM_FREQUENCY
+#    define IS31FL3742A_PWM_FREQUENCY IS31FL3742A_PWM_FREQUENCY_29K_HZ
+#endif
+
+#ifndef IS31FL3742A_SW_PULLDOWN
+#    define IS31FL3742A_SW_PULLDOWN IS31FL3742A_PDR_8K_OHM
+#endif
+
+#ifndef IS31FL3742A_CS_PULLUP
+#    define IS31FL3742A_CS_PULLUP IS31FL3742A_PUR_8K_OHM
+#endif
+
+#ifndef IS31FL3742A_GLOBAL_CURRENT
+#    define IS31FL3742A_GLOBAL_CURRENT 0xFF
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+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) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3742A_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3742A_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, 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_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 0 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3742A_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT) != 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT);
+#endif
+    }
+}
+
+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 (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
+}
+
+void is31fl3742a_init(uint8_t addr) {
+    // 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);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
+        is31fl3742a_write_register(addr, i, 0x00);
+    }
+
+    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+
+    for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i++) {
+        is31fl3742a_write_register(addr, i, 0x00);
+    }
+
+    is31fl3742a_select_page(addr, 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);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3742a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
+    is31fl3742a_led_t led;
+    if (index >= 0 && index < IS31FL3742A_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.r]          = red;
+        g_pwm_buffer[led.driver][led.g]          = green;
+        g_pwm_buffer[led.driver][led.b]          = blue;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void is31fl3742a_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
+    for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) {
+        is31fl3742a_set_color(i, red, green, blue);
+    }
+}
+
+void is31fl3742a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue) {
+    is31fl3742a_led_t led;
+    memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));
+
+    g_scaling_registers[led.driver][led.r] = red;
+    g_scaling_registers[led.driver][led.g] = green;
+    g_scaling_registers[led.driver][led.b] = blue;
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+
+        is31fl3742a_write_pwm_buffer(addr, g_pwm_buffer[index]);
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
+
+        for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
+            is31fl3742a_write_register(addr, i, g_scaling_registers[index][i]);
+        }
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+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
+}
diff --git a/drivers/led/issi/is31fl3742a.h b/drivers/led/issi/is31fl3742a.h
new file mode 100644
index 0000000000..304dd5925b
--- /dev/null
+++ b/drivers/led/issi/is31fl3742a.h
@@ -0,0 +1,299 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+#define IS31FL3742A_REG_INTERRUPT_MASK 0xF0
+#define IS31FL3742A_REG_INTERRUPT_STATUS 0xF1
+#define IS31FL3742A_REG_ID 0xFC
+
+#define IS31FL3742A_REG_COMMAND 0xFD
+
+#define IS31FL3742A_COMMAND_PWM 0x00
+#define IS31FL3742A_COMMAND_SCALING 0x02
+#define IS31FL3742A_COMMAND_FUNCTION 0x04
+
+#define IS31FL3742A_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3742A_FUNCTION_REG_PULLDOWNUP 0x02
+#define IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY 0x36
+#define IS31FL3742A_FUNCTION_REG_RESET 0x3F
+#define IS31FL3742A_FUNCTION_REG_SPREAD_SPECTRUM 0x41
+
+#define IS31FL3742A_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3742A_I2C_ADDRESS_GND 0x30
+#define IS31FL3742A_I2C_ADDRESS_SCL 0x31
+#define IS31FL3742A_I2C_ADDRESS_SDA 0x32
+#define IS31FL3742A_I2C_ADDRESS_VCC 0x33
+
+#if defined(RGB_MATRIX_IS31FL3742A)
+#    define IS31FL3742A_LED_COUNT RGB_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3742A_I2C_ADDRESS_4)
+#    define IS31FL3742A_DRIVER_COUNT 4
+#elif defined(IS31FL3742A_I2C_ADDRESS_3)
+#    define IS31FL3742A_DRIVER_COUNT 3
+#elif defined(IS31FL3742A_I2C_ADDRESS_2)
+#    define IS31FL3742A_DRIVER_COUNT 2
+#elif defined(IS31FL3742A_I2C_ADDRESS_1)
+#    define IS31FL3742A_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3742a_led_t {
+    uint8_t driver : 2;
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+} PACKED 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_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+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_flush(void);
+
+#define IS31FL3742A_PDR_0_OHM 0b000   // No pull-down resistor
+#define IS31FL3742A_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3742A_PDR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3742A_PDR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3742A_PDR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3742A_PDR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3742A_PDR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3742A_PDR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3742A_PUR_0_OHM 0b000   // No pull-up resistor
+#define IS31FL3742A_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3742A_PUR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3742A_PUR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3742A_PUR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3742A_PUR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3742A_PUR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3742A_PUR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3742A_PWM_FREQUENCY_29K_HZ 0b0000
+#define IS31FL3742A_PWM_FREQUENCY_3K6_HZ 0b0011
+#define IS31FL3742A_PWM_FREQUENCY_1K8_HZ 0b0111
+#define IS31FL3742A_PWM_FREQUENCY_900_HZ 0b1011
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+#define CS19_SW1 0x12
+#define CS20_SW1 0x13
+#define CS21_SW1 0x14
+#define CS22_SW1 0x15
+#define CS23_SW1 0x16
+#define CS24_SW1 0x17
+#define CS25_SW1 0x18
+#define CS26_SW1 0x19
+#define CS27_SW1 0x1A
+#define CS28_SW1 0x1B
+#define CS29_SW1 0x1C
+#define CS30_SW1 0x1D
+
+#define CS1_SW2 0x1E
+#define CS2_SW2 0x1F
+#define CS3_SW2 0x20
+#define CS4_SW2 0x21
+#define CS5_SW2 0x22
+#define CS6_SW2 0x23
+#define CS7_SW2 0x24
+#define CS8_SW2 0x25
+#define CS9_SW2 0x26
+#define CS10_SW2 0x27
+#define CS11_SW2 0x28
+#define CS12_SW2 0x29
+#define CS13_SW2 0x2A
+#define CS14_SW2 0x2B
+#define CS15_SW2 0x2C
+#define CS16_SW2 0x2D
+#define CS17_SW2 0x2E
+#define CS18_SW2 0x2F
+#define CS19_SW2 0x30
+#define CS20_SW2 0x31
+#define CS21_SW2 0x32
+#define CS22_SW2 0x33
+#define CS23_SW2 0x34
+#define CS24_SW2 0x35
+#define CS25_SW2 0x36
+#define CS26_SW2 0x37
+#define CS27_SW2 0x38
+#define CS28_SW2 0x39
+#define CS29_SW2 0x3A
+#define CS30_SW2 0x3B
+
+#define CS1_SW3 0x3C
+#define CS2_SW3 0x3D
+#define CS3_SW3 0x3E
+#define CS4_SW3 0x3F
+#define CS5_SW3 0x40
+#define CS6_SW3 0x41
+#define CS7_SW3 0x42
+#define CS8_SW3 0x43
+#define CS9_SW3 0x44
+#define CS10_SW3 0x45
+#define CS11_SW3 0x46
+#define CS12_SW3 0x47
+#define CS13_SW3 0x48
+#define CS14_SW3 0x49
+#define CS15_SW3 0x4A
+#define CS16_SW3 0x4B
+#define CS17_SW3 0x4C
+#define CS18_SW3 0x4D
+#define CS19_SW3 0x4E
+#define CS20_SW3 0x4F
+#define CS21_SW3 0x50
+#define CS22_SW3 0x51
+#define CS23_SW3 0x52
+#define CS24_SW3 0x53
+#define CS25_SW3 0x54
+#define CS26_SW3 0x55
+#define CS27_SW3 0x56
+#define CS28_SW3 0x57
+#define CS29_SW3 0x58
+#define CS30_SW3 0x59
+
+#define CS1_SW4 0x5A
+#define CS2_SW4 0x5B
+#define CS3_SW4 0x5C
+#define CS4_SW4 0x5D
+#define CS5_SW4 0x5E
+#define CS6_SW4 0x5F
+#define CS7_SW4 0x60
+#define CS8_SW4 0x61
+#define CS9_SW4 0x62
+#define CS10_SW4 0x63
+#define CS11_SW4 0x64
+#define CS12_SW4 0x65
+#define CS13_SW4 0x66
+#define CS14_SW4 0x67
+#define CS15_SW4 0x68
+#define CS16_SW4 0x69
+#define CS17_SW4 0x6A
+#define CS18_SW4 0x6B
+#define CS19_SW4 0x6C
+#define CS20_SW4 0x6D
+#define CS21_SW4 0x6E
+#define CS22_SW4 0x6F
+#define CS23_SW4 0x70
+#define CS24_SW4 0x71
+#define CS25_SW4 0x72
+#define CS26_SW4 0x73
+#define CS27_SW4 0x74
+#define CS28_SW4 0x75
+#define CS29_SW4 0x76
+#define CS30_SW4 0x77
+
+#define CS1_SW5 0x78
+#define CS2_SW5 0x79
+#define CS3_SW5 0x7A
+#define CS4_SW5 0x7B
+#define CS5_SW5 0x7C
+#define CS6_SW5 0x7D
+#define CS7_SW5 0x7E
+#define CS8_SW5 0x7F
+#define CS9_SW5 0x80
+#define CS10_SW5 0x81
+#define CS11_SW5 0x82
+#define CS12_SW5 0x83
+#define CS13_SW5 0x84
+#define CS14_SW5 0x85
+#define CS15_SW5 0x86
+#define CS16_SW5 0x87
+#define CS17_SW5 0x88
+#define CS18_SW5 0x89
+#define CS19_SW5 0x8A
+#define CS20_SW5 0x8B
+#define CS21_SW5 0x8C
+#define CS22_SW5 0x8D
+#define CS23_SW5 0x8E
+#define CS24_SW5 0x8F
+#define CS25_SW5 0x90
+#define CS26_SW5 0x91
+#define CS27_SW5 0x92
+#define CS28_SW5 0x93
+#define CS29_SW5 0x94
+#define CS30_SW5 0x95
+
+#define CS1_SW6 0x96
+#define CS2_SW6 0x97
+#define CS3_SW6 0x98
+#define CS4_SW6 0x99
+#define CS5_SW6 0x9A
+#define CS6_SW6 0x9B
+#define CS7_SW6 0x9C
+#define CS8_SW6 0x9D
+#define CS9_SW6 0x9E
+#define CS10_SW6 0x9F
+#define CS11_SW6 0xA0
+#define CS12_SW6 0xA1
+#define CS13_SW6 0xA2
+#define CS14_SW6 0xA3
+#define CS15_SW6 0xA4
+#define CS16_SW6 0xA5
+#define CS17_SW6 0xA6
+#define CS18_SW6 0xA7
+#define CS19_SW6 0xA8
+#define CS20_SW6 0xA9
+#define CS21_SW6 0xAA
+#define CS22_SW6 0xAB
+#define CS23_SW6 0xAC
+#define CS24_SW6 0xAD
+#define CS25_SW6 0xAE
+#define CS26_SW6 0xAF
+#define CS27_SW6 0xB0
+#define CS28_SW6 0xB1
+#define CS29_SW6 0xB2
+#define CS30_SW6 0xB3
diff --git a/drivers/led/issi/is31flcommon.h b/drivers/led/issi/is31flcommon.h
index 10613a6eed..1ba57c6cf7 100644
--- a/drivers/led/issi/is31flcommon.h
+++ b/drivers/led/issi/is31flcommon.h
@@ -26,9 +26,7 @@
 #include "util.h"
 
 // Which variant header file to use
-#if defined(LED_MATRIX_IS31FL3742A) || defined(RGB_MATRIX_IS31FL3742A)
-#    include "is31fl3742.h"
-#elif defined(LED_MATRIX_IS31FL3743A) || defined(RGB_MATRIX_IS31FL3743A)
+#if defined(LED_MATRIX_IS31FL3743A) || defined(RGB_MATRIX_IS31FL3743A)
 #    include "is31fl3743.h"
 #elif defined(LED_MATRIX_IS31FL3745) || defined(RGB_MATRIX_IS31FL3745)
 #    include "is31fl3745.h"
diff --git a/quantum/led_matrix/led_matrix_drivers.c b/quantum/led_matrix/led_matrix_drivers.c
index 672238a260..26179dfa4e 100644
--- a/quantum/led_matrix/led_matrix_drivers.c
+++ b/quantum/led_matrix/led_matrix_drivers.c
@@ -73,6 +73,14 @@ const led_matrix_driver_t led_matrix_driver = {
     .set_value_all = is31fl3741_set_value_all,
 };
 
+#elif defined(LED_MATRIX_IS31FL3742A)
+const led_matrix_driver_t led_matrix_driver = {
+    .init          = is31fl3742a_init_drivers,
+    .flush         = is31fl3742a_flush,
+    .set_value     = is31fl3742a_set_value,
+    .set_value_all = is31fl3742a_set_value_all,
+};
+
 #elif defined(IS31FLCOMMON)
 const led_matrix_driver_t led_matrix_driver = {
     .init          = IS31FL_simple_init_drivers,
diff --git a/quantum/led_matrix/led_matrix_drivers.h b/quantum/led_matrix/led_matrix_drivers.h
index b0ef3dfafc..88ceebc04b 100644
--- a/quantum/led_matrix/led_matrix_drivers.h
+++ b/quantum/led_matrix/led_matrix_drivers.h
@@ -17,6 +17,8 @@
 #    include "is31fl3737-simple.h"
 #elif defined(LED_MATRIX_IS31FL3741)
 #    include "is31fl3741-simple.h"
+#elif defined(LED_MATRIX_IS31FL3742A)
+#    include "is31fl3742a-simple.h"
 #elif defined(IS31FLCOMMON)
 #    include "is31flcommon.h"
 #elif defined(LED_MATRIX_SNLED27351)
diff --git a/quantum/rgb_matrix/rgb_matrix_drivers.c b/quantum/rgb_matrix/rgb_matrix_drivers.c
index ef12434aa2..79f82a0c87 100644
--- a/quantum/rgb_matrix/rgb_matrix_drivers.c
+++ b/quantum/rgb_matrix/rgb_matrix_drivers.c
@@ -76,6 +76,14 @@ const rgb_matrix_driver_t rgb_matrix_driver = {
     .set_color_all = is31fl3741_set_color_all,
 };
 
+#elif defined(RGB_MATRIX_IS31FL3742A)
+const rgb_matrix_driver_t rgb_matrix_driver = {
+    .init          = is31fl3742a_init_drivers,
+    .flush         = is31fl3742a_flush,
+    .set_color     = is31fl3742a_set_color,
+    .set_color_all = is31fl3742a_set_color_all,
+};
+
 #elif defined(IS31FLCOMMON)
 const rgb_matrix_driver_t rgb_matrix_driver = {
     .init          = IS31FL_RGB_init_drivers,
diff --git a/quantum/rgb_matrix/rgb_matrix_drivers.h b/quantum/rgb_matrix/rgb_matrix_drivers.h
index 991344f087..298167e6ed 100644
--- a/quantum/rgb_matrix/rgb_matrix_drivers.h
+++ b/quantum/rgb_matrix/rgb_matrix_drivers.h
@@ -19,6 +19,8 @@
 #    include "is31fl3737.h"
 #elif defined(RGB_MATRIX_IS31FL3741)
 #    include "is31fl3741.h"
+#elif defined(RGB_MATRIX_IS31FL3742A)
+#    include "is31fl3742a.h"
 #elif defined(IS31FLCOMMON)
 #    include "is31flcommon.h"
 #elif defined(RGB_MATRIX_SNLED27351)