diff --git a/drivers/st/pmic/stm32mp_pmic.c b/drivers/st/pmic/stm32mp_pmic.c
index a1031fd..5b43760 100644
--- a/drivers/st/pmic/stm32mp_pmic.c
+++ b/drivers/st/pmic/stm32mp_pmic.c
@@ -329,6 +329,36 @@
 	return 0;
 }
 
+int pmic_voltages_init(void)
+{
+#if STM32MP13
+	struct rdev *buck1, *buck4;
+	int status;
+
+	buck1 = regulator_get_by_name("buck1");
+	if (buck1 == NULL) {
+		return -ENOENT;
+	}
+
+	buck4 = regulator_get_by_name("buck4");
+	if (buck4 == NULL) {
+		return -ENOENT;
+	}
+
+	status = regulator_set_min_voltage(buck1);
+	if (status != 0) {
+		return status;
+	}
+
+	status = regulator_set_min_voltage(buck4);
+	if (status != 0) {
+		return status;
+	}
+#endif
+
+	return 0;
+}
+
 enum {
 	STPMIC1_BUCK1 = 0,
 	STPMIC1_BUCK2,
diff --git a/include/drivers/st/stm32mp_pmic.h b/include/drivers/st/stm32mp_pmic.h
index 4dfb038..303c571 100644
--- a/include/drivers/st/stm32mp_pmic.h
+++ b/include/drivers/st/stm32mp_pmic.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2021, STMicroelectronics - All Rights Reserved
+ * Copyright (c) 2017-2022, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -48,4 +48,11 @@
  */
 int pmic_ddr_power_init(enum ddr_type ddr_type);
 
+/*
+ * pmic_voltages_init - Update voltages for platform init
+ *
+ * Returns 0 on success, and negative values on errors
+ */
+int pmic_voltages_init(void);
+
 #endif /* STM32MP_PMIC_H */