TQMa8MxML - YOCTO Linux BSP documentation
Buttons
There are three GPIO buttons on the MBa8Mx. They are bound to the gpio-keys driver, and can be tested with the evtest tool.
GPIO Button Overview
| Reference | Button |
|---|---|
| S1 | BTN0 |
| S2 | BTN1 |
| S3 | BTN2 |
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