diff --git a/drivers/clock_control/clock_stm32_ll_h7.c b/drivers/clock_control/clock_stm32_ll_h7.c
index 95aa0c1b8cb..e99ea44452a 100644
--- a/drivers/clock_control/clock_stm32_ll_h7.c
+++ b/drivers/clock_control/clock_stm32_ll_h7.c
@@ -249,27 +249,6 @@ static uint32_t get_hclk_frequency(void)
 
 static int32_t prepare_regulator_voltage_scale(void)
 {
-	/* Apply system power supply configuration */
-#if defined(SMPS) && defined(CONFIG_POWER_SUPPLY_DIRECT_SMPS)
-	LL_PWR_ConfigSupply(LL_PWR_DIRECT_SMPS_SUPPLY);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_LDO);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_2V5_SUPPLIES_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_2V5_SUPPLIES_LDO);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_EXT_AND_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_EXT_AND_LDO);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_2V5_SUPPLIES_EXT_AND_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_2V5_SUPPLIES_EXT_AND_LDO);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_EXT)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_EXT);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_2V5_SUPPLIES_EXT)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_2V5_SUPPLIES_EXT);
-#elif defined(CONFIG_POWER_SUPPLY_EXTERNAL_SOURCE)
-	LL_PWR_ConfigSupply(LL_PWR_EXTERNAL_SOURCE_SUPPLY);
-#else
-	LL_PWR_ConfigSupply(LL_PWR_LDO_SUPPLY);
-#endif
-
 	/* Make sure to put the CPU in highest Voltage scale during clock configuration */
 	/* Highest voltage is SCALE0 */
 	LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE0);
@@ -279,6 +258,7 @@ static int32_t prepare_regulator_voltage_scale(void)
 	while (LL_PWR_IsActiveFlag_VOS() == 0) {
 #endif
 	}
+
 	return 0;
 }
 
@@ -292,25 +272,6 @@ static int32_t optimize_regulator_voltage_scale(uint32_t sysclk_freq)
 	/* LL_PWR_REGULATOR_SCALE3 is lowest power consumption */
 	/* Must be done in accordance to the Maximum allowed frequency vs VOS*/
 	/* See RM0433 page 352 for more details */
-#if defined(SMPS) && defined(CONFIG_POWER_SUPPLY_DIRECT_SMPS)
-	LL_PWR_ConfigSupply(LL_PWR_DIRECT_SMPS_SUPPLY);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_LDO);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_2V5_SUPPLIES_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_2V5_SUPPLIES_LDO);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_EXT_AND_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_EXT_AND_LDO);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_2V5_SUPPLIES_EXT_AND_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_2V5_SUPPLIES_EXT_AND_LDO);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_EXT)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_EXT);
-#elif defined(SMPS) && defined(CONFIG_POWER_SUPPLY_SMPS_2V5_SUPPLIES_EXT)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_2V5_SUPPLIES_EXT);
-#elif defined(CONFIG_POWER_SUPPLY_EXTERNAL_SOURCE)
-	LL_PWR_ConfigSupply(LL_PWR_EXTERNAL_SOURCE_SUPPLY);
-#else
-	LL_PWR_ConfigSupply(LL_PWR_LDO_SUPPLY);
-#endif
 	LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE0);
 #if defined(CONFIG_SOC_SERIES_STM32H7RSX)
 	while (LL_PWR_IsActiveFlag_VOSRDY() == 0) {
@@ -318,6 +279,7 @@ static int32_t optimize_regulator_voltage_scale(uint32_t sysclk_freq)
 	while (LL_PWR_IsActiveFlag_VOS() == 0) {
 #endif
 	};
+
 	return 0;
 }