test touchscreen controller

[EvanKrall]

• [x] check if it enumerates on i2c
• [ ] write device tree overlay
• [ ] see if connectors can be inserted upside down (to work around #2 )
• [ ] should I be using the gt9110 instead of the gt9113? It has linux support.

[EvanKrall]

I need to wire up the INT pin to a GPIO :(

this is gonna be a fun bodge.