6 files changed, 12 insertions, 3 deletions
diff --git a/keyboards/monarch/config.h b/keyboards/monarch/config.h
index ca9e2646b5..6822b2f789 100644
--- a/keyboards/monarch/config.h
+++ b/keyboards/monarch/config.h
@@ -46,6 +46,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BACKLIGHT_BREATHING
 #define BREATHING_PERIOD 6
 
+#define SLEEP_LED_GPT_DRIVER GPTD1
+
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
 
diff --git a/keyboards/monarch/halconf.h b/keyboards/monarch/halconf.h
index c4a89408af..d27e21ad7f 100644
--- a/keyboards/monarch/halconf.h
+++ b/keyboards/monarch/halconf.h
@@ -21,6 +21,7 @@
 
 #pragma once
 
+#define HAL_USE_GPT TRUE
 #define HAL_USE_PWM TRUE
 
 #include_next <halconf.h>
diff --git a/keyboards/monarch/keymaps/default/keymap.c b/keyboards/monarch/keymaps/default/keymap.c
index e4d4e9ef35..fb480b8a7f 100644
--- a/keyboards/monarch/keymaps/default/keymap.c
+++ b/keyboards/monarch/keymaps/default/keymap.c
@@ -34,10 +34,11 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   )
 };
 
-void encoder_update_user(uint8_t index, bool clockwise) {
+bool encoder_update_user(uint8_t index, bool clockwise) {
     if (clockwise) {
         tap_code(KC_VOLU);
     } else {
         tap_code(KC_VOLD);
     }
+    return true;
 }
diff --git a/keyboards/monarch/keymaps/iso/keymap.c b/keyboards/monarch/keymaps/iso/keymap.c
index 71f02675eb..2a6ea3a340 100644
--- a/keyboards/monarch/keymaps/iso/keymap.c
+++ b/keyboards/monarch/keymaps/iso/keymap.c
@@ -34,10 +34,11 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   )
 };
 
-void encoder_update_user(uint8_t index, bool clockwise) {
+bool encoder_update_user(uint8_t index, bool clockwise) {
     if (clockwise) {
         tap_code(KC_VOLU);
     } else {
         tap_code(KC_VOLD);
     }
+    return true;
 }
diff --git a/keyboards/monarch/keymaps/via/keymap.c b/keyboards/monarch/keymaps/via/keymap.c
index 1f14b195dc..079ff65a6b 100644
--- a/keyboards/monarch/keymaps/via/keymap.c
+++ b/keyboards/monarch/keymaps/via/keymap.c
@@ -76,7 +76,7 @@ void matrix_scan_user(void) {
     }
 }
 
-void encoder_update_user(uint8_t index, bool clockwise) {
+bool encoder_update_user(uint8_t index, bool clockwise) {
     if (clockwise) {
         encoder_cw.pressed = true;
         encoder_cw.time = (timer_read() | 1);
@@ -86,4 +86,5 @@ void encoder_update_user(uint8_t index, bool clockwise) {
         encoder_ccw.time = (timer_read() | 1);
         action_exec(encoder_ccw);
     }
+    return true;
 }
diff --git a/keyboards/monarch/mcuconf.h b/keyboards/monarch/mcuconf.h
index c16c3889a6..ebb2985722 100644
--- a/keyboards/monarch/mcuconf.h
+++ b/keyboards/monarch/mcuconf.h
@@ -23,6 +23,9 @@
 
 #include_next <mcuconf.h>
 
+#undef STM32_GPT_USE_TIM1
+#define STM32_GPT_USE_TIM1 TRUE
+
 #undef STM32_PWM_USE_TIM3
 #define STM32_PWM_USE_TIM3 TRUE