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

[Pavel Yermolenko]

Hello,

There are single event0 file in /dev/input/.

How to check to which peripheral it's associated ?

Thanks.

[Robert Nelson]

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,

--
Robert Nelson
https://rcn-ee.com/

[Pavel Yermolenko]

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.

On Monday, September 21, 2020 at 5:59:56 PM UTC+2, RobertCNelson wrote: