feat(st-pmic): add pmic_voltages_init() function
This new function pmic_voltages_init() is used to set the minimum value
for STM32MP13 VDDCPU and VDDCORE regulators. This value is retrieved
from device tree.
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: Ibbe237cb5dccc1fddf92e07ffd3955048ff82075
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 */