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drivers: rtc: stm32: allow new RTC driver to work with BBRAM

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STM32 BBRAM depends on RTC to work. This changes STM32 RTC init stage to
PRE_KERNEL_1 to allow RTC driver to initialize before BBRAM driver.

Some adjustments are made so that kernel API is not used during the init
procedure.

Signed-off-by: Johan Lafon <johan.lafon@syslinbit.com>
This commit is contained in:
Johan Lafon 2023-09-13 19:55:08 +02:00 • committed by Fabio Baltieri
commit a63bb6317c
3 changed files with 22 additions and 9 deletions
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drivers/rtc/Kconfig.stm32
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@ -5,6 +5,7 @@ config RTC_STM32
bool "STM32 RTC driver"
default y if !COUNTER
depends on DT_HAS_ST_STM32_RTC_ENABLED && !SOC_SERIES_STM32F1X
select USE_STM32_LL_RTC
select USE_STM32_LL_PWR
select USE_STM32_LL_RCC
help