This patch addresses several issues and adds enhancements to the WWDG
(Window Watchdog) implementation for the STM32H7 platform. The changes
include:
- Extend the definitions of WWDG_CFR_PCLK1 macros to support dividers
up to 128, and update the stm32_settimeout() function to consider this
extended range.
- Fix the "elapsed" calculations in the stm32_getstatus() function to
ensure correct time remaining calculations.
- Clear the EWIF (Early Wakeup Interrupt Flag) bit in the stm32_start()
function, as this bit might be set by hardware before the watchdog is
actually started.
- Initialize the WWDG clock in the RCC_APB3ENR register and set the
RCC_GCR_WW1RSC bit as per the STM32 reference manual to ensure proper
behavior when enabling the WWDG1.
Signed-off-by: Szymon Magrian <szymon.magrian@hexagon.com>
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