drivers: watchdog: stm32: add IWDG standby mode configuration#4
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ringlej wants to merge 1 commit intogridpoint-4.3.0from
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drivers: watchdog: stm32: add IWDG standby mode configuration#4ringlej wants to merge 1 commit intogridpoint-4.3.0from
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Add Kconfig choice to control the IWDG_STDBY option byte, allowing users to configure whether the independent watchdog runs or is frozen during standby mode. Uses the public flash_ex_op API to read/write option bytes at APPLICATION init level (flash device must be ready). Three options: - No change (default): leave option byte as-is, no extra code - Freeze: clear IWDG_STDBY so IWDG is frozen in standby - Active: set IWDG_STDBY so IWDG continues running in standby The write triggers OBL_LAUNCH (system reset) only when the option byte differs from the desired value. On subsequent boots, no write occurs. Signed-off-by: Jon Ringle <jringle@gridpoint.com>
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Summary
IWDG_STM32_STANDBY) to control the IWDG_STDBY option byteflash_ex_opAPI (FLASH_STM32_EX_OP_OPTB_READ/WRITE) to manage option bytesSYS_INIT(APPLICATION, 0)to avoid flash semaphore ordering issues at POST_KERNEL