soc: st: stm32: allow configuration of Backup SRAM initialization priority

Add CONFIG_STM32_BACKUP_SRAM_INIT_PRIORITY for configuring the
initialization priority of the STM32 Backup SRAM driver.

Signed-off-by: Henrik Brix Andersen <[email protected]>

Author: henrikbrixandersen

soc/st/stm32/Kconfig

@@ -31,6 +31,13 @@ config STM32_BACKUP_SRAM
 	help
 	  Enable support for STM32 backup SRAM.
 
+config STM32_BACKUP_SRAM_INIT_PRIORITY
+	int "STM32 Backup SRAM init priority"
+	default APPLICATION_INIT_PRIORITY
+	depends on STM32_BACKUP_SRAM
+	help
+	  STM32 Backup SRAM device initialization priority.
+
 config STM32_ENABLE_DEBUG_SLEEP_STOP
 	bool "Allow debugger attach in stop/sleep Mode"
 	help

soc/st/stm32/common/stm32_backup_sram.c

@@ -59,4 +59,4 @@ static const struct stm32_backup_sram_config config = {
 };
 
 DEVICE_DT_INST_DEFINE(0, stm32_backup_sram_init, NULL, NULL, &config,
-		      POST_KERNEL, CONFIG_APPLICATION_INIT_PRIORITY, NULL);
+		      POST_KERNEL, CONFIG_STM32_BACKUP_SRAM_INIT_PRIORITY, NULL);