DT overlays for Olimex Allwinner SOC boards
What is this?
These overlays allow easier usage of UART, SPI, and CAN (i2c is enabled by default so no need of overlay).
How to enable these overlays?
Make sure that you use the Olimex Armbian-based image for A20 boards. Compile and activate the overlay by running armbian-add-overlay <overlay.dts> as root, i.e. if you wish to enable uart6:
sh armbian-add-overlay sun7i-a20-uart6.dts
Reboot the board.
For more info refer to the Armbian documentation here: https://docs.armbian.com/Hardware_Allwinner_overlays/