[Bug] Fix IS31fl3741 driver to accept 1 or 2 addresses (#14451)

Co-authored-by: Joel Challis <git@zvecr.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/quantum/rgb_matrix/rgb_matrix_drivers.c b/quantum/rgb_matrix/rgb_matrix_drivers.c
index bfaedaa4a..2cec162e2 100644
--- a/quantum/rgb_matrix/rgb_matrix_drivers.c
+++ b/quantum/rgb_matrix/rgb_matrix_drivers.c
@@ -172,7 +172,12 @@ const rgb_matrix_driver_t rgb_matrix_driver = {
     .set_color_all = IS31FL3737_set_color_all,
 };
 #    else
-static void flush(void) { IS31FL3741_update_pwm_buffers(DRIVER_ADDR_1, DRIVER_ADDR_2); }
+static void flush(void) {
+    IS31FL3741_update_pwm_buffers(DRIVER_ADDR_1, 0);
+#        if defined(DRIVER_ADDR_2) && (DRIVER_ADDR_2 != DRIVER_ADDR_1)  // provides backward compatibility
+    IS31FL3741_update_pwm_buffers(DRIVER_ADDR_2, 1);
+#        endif
+}
 
 const rgb_matrix_driver_t rgb_matrix_driver = {
     .init = init,