QMK PS2 mouse as pointing device so it works for splits

qmk_ps2_mouse_as_pointing_device_driver.patch

diff --git a/drivers/ps2/ps2_mouse.c b/drivers/ps2/ps2_mouse.c
index ef1a0e26f9..b2dafb1f3c 100644
--- a/drivers/ps2/ps2_mouse.c
+++ b/drivers/ps2/ps2_mouse.c
@@ -29,6 +29,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* ============================= MACROS ============================ */
 
 static report_mouse_t mouse_report = {};
+#if defined(POINTING_DEVICE_DRIVER_ps2_mouse)
+static report_mouse_t mouse_report_buffer = {};
+#endif
 
 static inline void ps2_mouse_print_report(report_mouse_t *mouse_report);
 static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report);
@@ -125,7 +128,15 @@ void ps2_mouse_task(void) {
         // Used to debug the bytes sent to the host
         ps2_mouse_print_report(&mouse_report);
 #endif
+
+#if defined(POINTING_DEVICE_DRIVER_ps2_mouse)
+        mouse_report_buffer.x += mouse_report.x;
+        mouse_report_buffer.y += mouse_report.y;
+        mouse_report_buffer.h += mouse_report.h;
+        mouse_report_buffer.v += mouse_report.v;
+#else
         host_mouse_send(&mouse_report);
+#endif
     }
 
     ps2_mouse_clear_report(&mouse_report);
@@ -305,7 +316,14 @@ static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report) {
 #if PS2_MOUSE_SCROLL_BTN_SEND
         if (scroll_state == SCROLL_BTN && timer_elapsed(scroll_button_time) < PS2_MOUSE_SCROLL_BTN_SEND) {
             PRESS_SCROLL_BUTTONS;
+#if defined(POINTING_DEVICE_DRIVER_ps2_mouse)
+            mouse_report_buffer.x += mouse_report->x;
+            mouse_report_buffer.y += mouse_report->y;
+            mouse_report_buffer.h += mouse_report->h;
+            mouse_report_buffer.v += mouse_report->v;
+#else
             host_mouse_send(mouse_report);
+#endif
             wait_ms(100);
             RELEASE_SCROLL_BUTTONS;
         }
@@ -315,3 +333,11 @@ static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report) {
 
     RELEASE_SCROLL_BUTTONS;
 }
+
+void ps2_mouse_accumulated_report(report_mouse_t* destination) {
+    destination->x = mouse_report_buffer.x;
+    destination->y = mouse_report_buffer.y;
+    destination->v = mouse_report_buffer.v;
+    destination->h = mouse_report_buffer.h;
+    memset(&mouse_report_buffer, 0, sizeof(mouse_report_buffer));
+}
diff --git a/drivers/ps2/ps2_mouse.h b/drivers/ps2/ps2_mouse.h
index 885eeecbd2..bd17e4f5bc 100644
--- a/drivers/ps2/ps2_mouse.h
+++ b/drivers/ps2/ps2_mouse.h
@@ -175,3 +175,5 @@ void ps2_mouse_set_resolution(ps2_mouse_resolution_t resolution);
 void ps2_mouse_set_sample_rate(ps2_mouse_sample_rate_t sample_rate);
 
 void ps2_mouse_moved_user(report_mouse_t *mouse_report);
+
+void ps2_mouse_accumulated_report(report_mouse_t* destination);
diff --git a/quantum/keyboard.c b/quantum/keyboard.c
index df1dc1c3ee..58a20570dd 100644
--- a/quantum/keyboard.c
+++ b/quantum/keyboard.c
@@ -695,6 +695,10 @@ void keyboard_task(void) {
     }
 #endif
 
+#ifdef PS2_MOUSE_ENABLE
+    ps2_mouse_task();
+#endif
+
 #ifdef POINTING_DEVICE_ENABLE
     if (pointing_device_task()) {
         last_pointing_device_activity_trigger();
@@ -723,10 +727,6 @@ void keyboard_task(void) {
     mousekey_task();
 #endif
 
-#ifdef PS2_MOUSE_ENABLE
-    ps2_mouse_task();
-#endif
-
 #ifdef MIDI_ENABLE
     midi_task();
 #endif
diff --git a/quantum/pointing_device/pointing_device.h b/quantum/pointing_device/pointing_device.h
index 1cd4b0b5e6..09f4ee6df9 100644
--- a/quantum/pointing_device/pointing_device.h
+++ b/quantum/pointing_device/pointing_device.h
@@ -39,6 +39,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    include "analog.h"
 #    include "drivers/sensors/analog_joystick.h"
 #    define POINTING_DEVICE_MOTION_PIN_ACTIVE_LOW
+#elif defined(POINTING_DEVICE_DRIVER_ps2_mouse)
+#    include "ps2_mouse.h"
 #elif defined(POINTING_DEVICE_DRIVER_azoteq_iqs5xx)
 #    include "i2c_master.h"
 #    include "drivers/sensors/azoteq_iqs5xx.h"
diff --git a/quantum/pointing_device/pointing_device_drivers.c b/quantum/pointing_device/pointing_device_drivers.c
index bf131c6eda..b74b5e32ae 100644
--- a/quantum/pointing_device/pointing_device_drivers.c
+++ b/quantum/pointing_device/pointing_device_drivers.c
@@ -115,6 +115,26 @@ const pointing_device_driver_t pointing_device_driver = {
 };
 // clang-format on
 
+#elif defined(POINTING_DEVICE_DRIVER_ps2_mouse)
+void ps2_mouse_driver_init(void) { } // nothing
+
+report_mouse_t ps2_mouse_driver_get_report(report_mouse_t mouse_report) {
+    ps2_mouse_accumulated_report(&mouse_report);
+
+    pd_dprintf("Raw ] X: %d, Y: %d, V: %d, H: %d\n", mouse_report.x, mouse_report.y, mouse_report.v, mouse_report.h);
+
+    return mouse_report;
+}
+
+// clang-format off
+const pointing_device_driver_t pointing_device_driver = {
+    .init       = ps2_mouse_driver_init,
+    .get_report = ps2_mouse_driver_get_report,
+    .set_cpi    = NULL,
+    .get_cpi    = NULL
+};
+// clang-format on
+
 #elif defined(POINTING_DEVICE_DRIVER_azoteq_iqs5xx)
 
 static i2c_status_t azoteq_iqs5xx_init_status = 1;