ST7735S display controller

[gsauthof]

The README.md currently reads:

The display controller interface is similar to ST7735 (Datasheet PDF) in case you're looking for low-level documentation.

According to Sipeed the display controller is in fact the ST7735S and they also provide its datasheet.

[tuupola]

Those are both standard MIPI DCS controllers so there is practically no difference.

[gsauthof]

Fair enough, I just mentioned it in case you want to make the README more specific / link to the exact matching datasheet.