High resolution scrolling (without feature report parsing) (#24423)

* hires scrolling without feature report parsing

* fix valid range for exponent

* fix incorrect minimum exponent value documentation

2 files changed, 23 insertions, 0 deletions

diff --git a/quantum/pointing_device/pointing_device.c b/quantum/pointing_device/pointing_device.c
index e26416f968..5ee65c9c61 100644
--- a/quantum/pointing_device/pointing_device.c
+++ b/quantum/pointing_device/pointing_device.c
@@ -25,6 +25,10 @@
 #    include "mousekey.h"
 #endif
 
+#ifdef POINTING_DEVICE_HIRES_SCROLL_ENABLE
+#    include "usb_descriptor_common.h"
+#endif
+
 #if (defined(POINTING_DEVICE_ROTATION_90) + defined(POINTING_DEVICE_ROTATION_180) + defined(POINTING_DEVICE_ROTATION_270)) > 1
 #    error More than one rotation selected.  This is not supported.
 #endif
@@ -78,6 +82,9 @@ uint16_t pointing_device_get_shared_cpi(void) {
 
 static report_mouse_t local_mouse_report         = {};
 static bool           pointing_device_force_send = false;
+#ifdef POINTING_DEVICE_HIRES_SCROLL_ENABLE
+static uint16_t hires_scroll_resolution;
+#endif
 
 #define POINTING_DEVICE_DRIVER_CONCAT(name) name##_pointing_device_driver
 #define POINTING_DEVICE_DRIVER(name) POINTING_DEVICE_DRIVER_CONCAT(name)
@@ -176,6 +183,12 @@ __attribute__((weak)) void pointing_device_init(void) {
 #    endif
 #endif
     }
+#ifdef POINTING_DEVICE_HIRES_SCROLL_ENABLE
+    hires_scroll_resolution = POINTING_DEVICE_HIRES_SCROLL_MULTIPLIER;
+    for (int i = 0; i < POINTING_DEVICE_HIRES_SCROLL_EXPONENT; i++) {
+        hires_scroll_resolution *= 10;
+    }
+#endif
 
     pointing_device_init_kb();
     pointing_device_init_user();
@@ -523,3 +536,9 @@ __attribute__((weak)) void pointing_device_keycode_handler(uint16_t keycode, boo
         pointing_device_send();
     }
 }
+
+#ifdef POINTING_DEVICE_HIRES_SCROLL_ENABLE
+uint16_t pointing_device_get_hires_scroll_resolution(void) {
+    return hires_scroll_resolution;
+}
+#endif
\ No newline at end of file
diff --git a/quantum/pointing_device/pointing_device.h b/quantum/pointing_device/pointing_device.h
index 7bc059e594..d8b583c87e 100644
--- a/quantum/pointing_device/pointing_device.h
+++ b/quantum/pointing_device/pointing_device.h
@@ -122,6 +122,10 @@ uint8_t        pointing_device_handle_buttons(uint8_t buttons, bool pressed, poi
 report_mouse_t pointing_device_adjust_by_defines(report_mouse_t mouse_report);
 void           pointing_device_keycode_handler(uint16_t keycode, bool pressed);
 
+#ifdef POINTING_DEVICE_HIRES_SCROLL_ENABLE
+uint16_t pointing_device_get_hires_scroll_resolution(void);
+#endif
+
 #if defined(SPLIT_POINTING_ENABLE)
 void     pointing_device_set_shared_report(report_mouse_t report);
 uint16_t pointing_device_get_shared_cpi(void);