AML-S905X-CC (Le Potato). How to enable and use UART on 40 pin header as TTY - overlay

Question

I want to use the UART on the 40 pin header (pins 8 and 10) of the AML-S905X-CC (Le Potato).
I have tried a couple of O/S like Raspbian Stretch Headless and Armbian, and while the boot and work fine, there seems to be no support for the on board UART on the 40 pin header.
I am happy to use any O/S which can provide this.
Do I need to use Device Tree Overlays to enable this?
If so, where can I download the devicetree overlay package and is there a tutorial or some documentation on the process.
If not, how can I use this onboard UART?
Thanks

Answer 1

This is what I do
ROOT###### ARNBIAN ONLY
wget https://raw.githubusercontent.com/libre-computer-project/libretech-overlays/for-4.13.y/overlays/meson-gxl-s905x-libretech-cc-i2c-ao.dts
sudo armbian-add-overlay meson-gxl-s905x-libretech-cc-i2c-ao.dts
end ROOT #####
If Ubuntu
git clone https://github.com/libre-computer-project/libretech-wiring-tool.git
cd libretech-wiring-tool
sudo make

Answer 2

It works for me:
wget https://raw.githubusercontent.com/libre-computer-project/libretech-overlays/for-4.13.y/overlays/meson-gxl-s905x-libretech-cc-uarta.dts
sudo armbian-add-overlay meson-gxl-s905x-libretech-cc-uarta.dts
python3 -m serial.tools.miniterm
--- Available ports:
--- Enter port index or full name:
Never port appears, but the uarta is working in /dev/ttyAML6.
python3
Python 3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import serial
>>> ser = serial.Serial()
>>> ser.baud = 9600
>>> ser.port = '/dev/ttyAML6'
>>> ser.open()
>>> ser.write(str.encode('test'))
4
>>>
Serial comm over the port /dev/ttyAML6 works!