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Summary
SAMA5D2 has Flexcom ports (SPI/USART/TWI). None work. this is the first PR, to fix USART operation.
Impact
should not affect any boards that aren't using SAMA5D2 Flexcom USART and will fix any that are.
Files changed:
arch/arm/src/sama5/Kconfig
arch/arm/src/sama5/sam_config.h
arch/arm/src/sama5/sam_flexcom_serial.c
arch/arm/src/sama5/sam_serial.c
arch/arc/src/sama5/sam_serialinit.c
Testing
Custom board with SAMA5D27C-D1M with 2x Flexcom USART ports. Both now work.