hello Kaspars,
First it all thank you for this great tuto and review. I’d like to send you 2 suggestions:
1st is to say that to follow your tips, we need to use a “hand builded image” of Armbian (https://github.com/armbian/build) instead of the pre-compiled available images on site.
2nd is to use this command:
modprobe fbtft_device custom name=fb_ili9340 gpios=dc:3,reset:0 speed=16000000 busnum=1 rotate=90 bgr=1
This LCD (ili9340) or fbtft, in my case, was with blue and red colors swapped, and bgr=1 make it right again.
Congrats again and best wishes,
tonispa