I have used the DTS approach from the tutorial but the display is inverted. I have the non-touch screen variant.
There is an ominous line in the tutorial:
However, the most apparent differences are the screen’s colors appear inverted when using the wrong setting
It however does not explain how to debug or fix said wrong setting. How do I fix this?
Which settings do you have in the config file?
For the non-touch version, it says it should be:
Module Configuration
Again, use your preferred text editor to add the required modules to /etc/modprobe.d/fbtft.conf.
Add the following text to the file:
options fbtft_device name=fb_ili9341 gpios=reset:23,dc:24 speed=16000000 bgr=1 rotate=180 custom=1
So, it’s saying copying the wrong config info will invert the colors 
https://learn.sparkfun.com/tutorials/sp … y-archived
You’ve linked to the archived section that I said I did not use since it is deprecated and literally does not work.
The section with the DTS: https://learn.sparkfun.com/tutorials/sp … -54-update
I am guessing that the DTS provided only works with the version of the hardware I did not receive.