1 files changed, 41 insertions, 4 deletions

diff --git a/quantum/rgb_matrix_drivers.c b/quantum/rgb_matrix_drivers.c
index 2978e7bed..a4db86d19 100644
--- a/quantum/rgb_matrix_drivers.c
+++ b/quantum/rgb_matrix_drivers.c
@@ -41,7 +41,28 @@ static void init(void) {
     IS31FL3731_init(DRIVER_ADDR_4);
 #        endif
 #    elif defined(IS31FL3733)
-    IS31FL3733_init(DRIVER_ADDR_1, 0);
+#        ifndef DRIVER_SYNC_1
+#            define DRIVER_SYNC_1 0
+#        endif
+    IS31FL3733_init(DRIVER_ADDR_1, DRIVER_SYNC_1);
+#        if defined DRIVER_ADDR_2 && (DRIVER_ADDR_1 != DRIVER_ADDR_2)
+#            ifndef DRIVER_SYNC_2
+#                define DRIVER_SYNC_2 0
+#            endif
+    IS31FL3733_init(DRIVER_ADDR_2, DRIVER_SYNC_2);
+#        endif
+#        ifdef DRIVER_ADDR_3
+#            ifndef DRIVER_SYNC_3
+#                define DRIVER_SYNC_3 0
+#            endif
+    IS31FL3733_init(DRIVER_ADDR_3, DRIVER_SYNC_3);
+#        endif
+#        ifdef DRIVER_ADDR_4
+#            ifndef DRIVER_SYNC_4
+#                define DRIVER_SYNC_4 0
+#            endif
+    IS31FL3733_init(DRIVER_ADDR_4, DRIVER_SYNC_4);
+#        endif
 #    elif defined(IS31FL3737)
     IS31FL3737_init(DRIVER_ADDR_1);
 #    else
@@ -74,7 +95,15 @@ static void init(void) {
 #        endif
 #    elif defined(IS31FL3733)
     IS31FL3733_update_led_control_registers(DRIVER_ADDR_1, 0);
+#        ifdef DRIVER_ADDR_2
     IS31FL3733_update_led_control_registers(DRIVER_ADDR_2, 1);
+#        endif
+#        ifdef DRIVER_ADDR_3
+    IS31FL3733_update_led_control_registers(DRIVER_ADDR_3, 2);
+#        endif
+#        ifdef DRIVER_ADDR_4
+    IS31FL3733_update_led_control_registers(DRIVER_ADDR_4, 3);
+#        endif
 #    elif defined(IS31FL3737)
     IS31FL3737_update_led_control_registers(DRIVER_ADDR_1, DRIVER_ADDR_2);
 #    else
@@ -105,13 +134,21 @@ const rgb_matrix_driver_t rgb_matrix_driver = {
 #    elif defined(IS31FL3733)
 static void flush(void) {
     IS31FL3733_update_pwm_buffers(DRIVER_ADDR_1, 0);
+#        ifdef DRIVER_ADDR_2
     IS31FL3733_update_pwm_buffers(DRIVER_ADDR_2, 1);
+#        endif
+#        ifdef DRIVER_ADDR_3
+    IS31FL3733_update_pwm_buffers(DRIVER_ADDR_3, 2);
+#        endif
+#        ifdef DRIVER_ADDR_4
+    IS31FL3733_update_pwm_buffers(DRIVER_ADDR_4, 3);
+#        endif
 }
 
 const rgb_matrix_driver_t rgb_matrix_driver = {
-    .init = init,
-    .flush = flush,
-    .set_color = IS31FL3733_set_color,
+    .init          = init,
+    .flush         = flush,
+    .set_color     = IS31FL3733_set_color,
     .set_color_all = IS31FL3733_set_color_all,
 };
 #    elif defined(IS31FL3737)