soc: st: stm32: h7rs: replace Kconfig power supply configuration with DT

Replace the existing infrastructure to specify power supply configuration
through Kconfig with Devicetree. Also update all boards that were defining
the Kconfig to no longer do so.

Signed-off-by: Mathieu Choplain <mathieu.choplain-ext@st.com>

Author: mathieuchopstm

boards/ruiside/art_pi2/art_pi2_defconfig

@@ -1,9 +1,6 @@
 # Copyright (c) 2025 Shan Pen <bricle031@gmail.com>
 # SPDX-License-Identifier: Apache-2.0
 
-# Enable SMPS
-CONFIG_POWER_SUPPLY_DIRECT_SMPS=y
-
 # Enable MPU
 CONFIG_ARM_MPU=y
 

boards/st/nucleo_h7s3l8/nucleo_h7s3l8_defconfig

@@ -1,9 +1,6 @@
 # Copyright (c) 2024 STMicroelectronics
 # SPDX-License-Identifier: Apache-2.0
 
-# Disable SMPS
-CONFIG_POWER_SUPPLY_DIRECT_SMPS=n
-
 # Enable MPU
 CONFIG_ARM_MPU=y
 

boards/st/stm32h7s78_dk/stm32h7s78_dk_defconfig

@@ -1,9 +1,6 @@
 # Copyright (c) 2024 STMicroelectronics
 # SPDX-License-Identifier: Apache-2.0
 
-# Enable SMPS
-CONFIG_POWER_SUPPLY_DIRECT_SMPS=y
-
 # Enable MPU
 CONFIG_ARM_MPU=y
 

boards/st/stm32h7s78_dk/stm32h7s78_dk_stm32h7s7xx_ext_flash_app_defconfig

@@ -1,9 +1,6 @@
 # Copyright (c) 2024 STMicroelectronics
 # SPDX-License-Identifier: Apache-2.0
 
-# Enable SMPS
-CONFIG_POWER_SUPPLY_DIRECT_SMPS=y
-
 # Enable MPU
 CONFIG_ARM_MPU=y
 

soc/st/stm32/Kconfig

@@ -79,43 +79,14 @@ config STM32_WKUP_PINS
 choice POWER_SUPPLY_CHOICE
 	prompt "STM32 power supply configuration"
 	default POWER_SUPPLY_LDO
-	depends on SOC_SERIES_STM32H7RSX || \
-		SOC_SERIES_STM32U5X || SOC_STM32WBA55XX || SOC_STM32WBA65XX
+	depends on SOC_SERIES_STM32U5X || SOC_STM32WBA55XX || SOC_STM32WBA65XX
 
 config POWER_SUPPLY_LDO
 	bool "LDO supply"
 
 config POWER_SUPPLY_DIRECT_SMPS
 	bool "Direct SMPS supply"
 
-config POWER_SUPPLY_SMPS_1V8_SUPPLIES_LDO
-	bool "SMPS 1.8V supplies LDO (no external supply)"
-	depends on SOC_SERIES_STM32H7RSX
-
-config POWER_SUPPLY_SMPS_2V5_SUPPLIES_LDO
-	bool "SMPS 2.5V supplies LDO (no external supply)"
-	depends on SOC_SERIES_STM32H7RSX
-
-config POWER_SUPPLY_SMPS_1V8_SUPPLIES_EXT_AND_LDO
-	bool "External SMPS 1.8V supply, supplies LDO"
-	depends on SOC_SERIES_STM32H7RSX
-
-config POWER_SUPPLY_SMPS_2V5_SUPPLIES_EXT_AND_LDO
-	bool "External SMPS 2.5V supply, supplies LDO"
-	depends on SOC_SERIES_STM32H7RSX
-
-config POWER_SUPPLY_SMPS_1V8_SUPPLIES_EXT
-	bool "External SMPS 1.8V supply and bypass"
-	depends on SOC_SERIES_STM32H7RSX
-
-config POWER_SUPPLY_SMPS_2V5_SUPPLIES_EXT
-	bool "External SMPS 2.5V supply and bypass"
-	depends on SOC_SERIES_STM32H7RSX
-
-config POWER_SUPPLY_EXTERNAL_SOURCE
-	bool "Bypass"
-	depends on SOC_SERIES_STM32H7RSX
-
 endchoice
 
 config STM32_BACKUP_PROTECTION

soc/st/stm32/stm32h7rsx/soc.c

@@ -20,6 +20,22 @@
 
 #include <cmsis_core.h>
 
+#define PWR_NODE DT_INST(0, st_stm32h7rs_pwr)
+
+/* Helper to simplify following #if chain */
+#define SELECTED_PSU(_x) DT_ENUM_HAS_VALUE(PWR_NODE, power_supply, _x)
+
+#if SELECTED_PSU(ldo)
+#define SELECTED_POWER_SUPPLY LL_PWR_LDO_SUPPLY
+#elif SELECTED_PSU(external_source)
+#define SELECTED_POWER_SUPPLY LL_PWR_EXTERNAL_SOURCE_SUPPLY
+#elif SELECTED_PSU(smps_direct)
+#define SELECTED_POWER_SUPPLY LL_PWR_DIRECT_SMPS_SUPPLY
+#elif SELECTED_PSU(smps_ext_ldo)
+#define SELECTED_POWER_SUPPLY LL_PWR_SMPS_1V8_SUPPLIES_EXT_AND_LDO
+#elif SELECTED_PSU(smps_ext_bypass)
+#define SELECTED_POWER_SUPPLY LL_PWR_SMPS_1V8_SUPPLIES_EXT
+#endif
 
 /**
  * @brief Perform basic hardware initialization at boot.
@@ -36,25 +52,7 @@ void soc_early_init_hook(void)
 	SystemCoreClock = 64000000;
 
 	/* Power Configuration */
-#if defined(CONFIG_POWER_SUPPLY_DIRECT_SMPS)
-	LL_PWR_ConfigSupply(LL_PWR_DIRECT_SMPS_SUPPLY);
-#elif defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_LDO);
-#elif defined(CONFIG_POWER_SUPPLY_SMPS_2V5_SUPPLIES_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_2V5_SUPPLIES_LDO);
-#elif defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_EXT_AND_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_EXT_AND_LDO);
-#elif defined(CONFIG_POWER_SUPPLY_SMPS_2V5_SUPPLIES_EXT_AND_LDO)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_2V5_SUPPLIES_EXT_AND_LDO);
-#elif defined(CONFIG_POWER_SUPPLY_SMPS_1V8_SUPPLIES_EXT)
-	LL_PWR_ConfigSupply(LL_PWR_SMPS_1V8_SUPPLIES_EXT);
-#elif 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_ConfigSupply(SELECTED_POWER_SUPPLY);
 	LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);
 	while (LL_PWR_IsActiveFlag_VOSRDY() == 0) {
 	}