TQMa91xxLA - YOCTO Linux BSP documentation
GPIO-Buttons
The MBa91xxCA features two user buttons which are handled by the gpio-keys driver.
GPIO Button Overview
| Reference | Button |
|---|---|
| S8 | BTN0 |
| S9 | BTN1 |
GPIO Button Location
The buttons are accessible via the input device interface. You can identify the correct event node and test the buttons using the evtest tool:
evtest
Select the number corresponding to the “gpio-keys” device. Alternatively, if the event node is known (e.g. /dev/input/event1), you can run it directly:
evtest /dev/input/event1