NanoPi M4: Enable UART2 on 40-pin header?
Posted: Thu Nov 10, 2022 11:36 pm
Looking at the NanoPi M4 schematic and the RK3399 TRM, it appears possible to connect UART2 to pins 8 and 10 of the 40-pin Raspberry Pi style connector on the NanoPi M4. Is there any reason I cannot enable the uart2b_xfer io-mux mode and enable the UART2 device in DTS to connect UART2 to the 40-pin header pins? Are there any other changes needed in the kernel or OS image to support this use case?