"event" files in /dev/input/: how to check to which peripheral they are associated

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1

Hello,

There are single event0 file in /dev/input/.
How to check to which peripheral it’s associated ?
Thanks.

2

You can use /dev/input/by-path/ to figure that out..

debian@bbg-pwr06-ser14:~$ ls -lha
/dev/input/by-path/platform-44e0b000.i2c-platform-tps65217-pwrbutton-event
lrwxrwxrwx 1 root root 9 Sep 8 16:22
/dev/input/by-path/platform-44e0b000.i2c-platform-tps65217-pwrbutton-event
-> ../event0

The tps65217's power button is setup as event0.. (labeled as POWER on
the silkscreen of the pcb)

Regards,

3

Thanks Robert,

Can one create another event and associate it with gpio ?
In the source code for “Exploring BeagleBone” there is example testgpio_keys.
In this code author explore event1 file.
Sincerely.