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nuttx/arch/arm
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Liam Howatt fa1d52a64d arch/arm/stm32h5: Add USART wake from low power. 
Support USART waking from low power modes, allow keeping
HSI running in STOP mode, allow specifying clock source
for USARTs, add some missing register and field definitions.

stm32 common Kconfigs:
Add common STM32 UART config options USARTx_WAKE_FROM_LOW_POWER and USARTx_WUS
for USART to cause wake up from low power modes.

stm32h5 board configs:
Allow board.h to choose the clock source of each USART.
Allow board.h to express that HSI should continue running
in low power modes.

stm32h5 RCC:
Set the clock source for each USART if specified in the
board configs (STM32_RCC_CCIPR1_USARTxSEL).
Keep HSI on in STOP mode if specified in the board configs
(STM32_BOARD_HSIKERON_ENABLE).

stm32h5 serial driver:
Use the new USARTx_WAKE_FROM_LOW_POWER and USARTx_WUS in
stm32h5 serial driver to wake from low power modes.
Use the USART clock source specified by board configs.
Enable FIFOs.
Clear UE bit before initialization.

Co-authored-by: Javier Casas <javiercasas@geotab.com>
Co-authored-by: daniellizewski <daniellizewski@geotab.com>
Signed-off-by: Liam Howatt <liamhowatt@geotab.com>
2026-09-19 08:52:17 -03:00
..
include arch/arm/n32h7: Add N32H762IIL7 BSP 2026-09-17 09:39:41 -03:00
src arch/arm/stm32h5: Add USART wake from low power. 2026-09-19 08:52:17 -03:00
CMakeLists.txt
Kconfig arch/arm/n32h7: Add N32H762IIL7 BSP 2026-09-17 09:39:41 -03:00