Device tree overlay and xorg config files for a 3.5 inch SPI ili9486 display on the Orangepi Zero 2W
I used this display https://joy-it.net/en/products/RB-TFT3.5 - but I think the waveshare 35a has a similar pinout. Take a look at the pinout diagram!
Steps to make it work:
git clone https://github.com/dev-null2019/orangepizero2w35tft
cd orangepizero2w35tft
sudo mv ./80-calibration.conf /usr/share/X11/xorg.conf.d
sudo mv ./99-fbdev.conf /usr/share/X11/xorg.conf.d
sudo orangepi-add-overlay ./joyit35a-overlay.dts
add fbtft to /etc/modules
reboot