STM32: Fix h7rs MPU memory type for XSPI external flash #99668
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Remove the ext_memory: memory@70000000 node as the external flash memory is part of the board design. The nucleo_h7s3l8 and stm32h7s78_dk boards already have this node. Signed-off-by: Thomas Decker <[email protected]>
Change the zephyr,memory-attr of the ext_memory / ext_flash_mem node to ATTR_MPU_FLASH because ATTR_MPU_IO does not allow unaligned memory access. Signed-off-by: Thomas Decker <[email protected]>
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erwango
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Nov 19, 2025
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juickar
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Nov 19, 2025
JarmouniA
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This adresses nr. 6 of #99505
Change the
zephyr,memory-attrof theext_memory/ext_flash_memnode toATTR_MPU_FLASHbecauseATTR_MPU_IOdoes not allow unaligned memory accesses.Also remove the
ext_memory: memory@70000000node from the SoC's dt, as the external flash memory is part of the board design. Same as withpsram-node which is only defined at board level at the stm32h7s78_dk.When someone connects the flash to XSPI1 or switches ports with XSPIM, external flash will not be at 0x70000000.
Note: The nucleo_h7s3l8 and stm32h7s78_dk boards already have this node.