TQMa8MPxL - YOCTO Linux BSP documentation

Overview
Quickstart BSP
Deployment
How-To
Known Issues

GPIO-Buttons

The MBa8MPxL features two user buttons which are handled by the gpio-keys driver.

GPIO Button Overview

Reference	Button
S12	BTN0
S13	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