linux-kernel - Keycodes for Factory reset button and USB Copy Button

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Message-ID: <1c63eb04e7a2d3365bfcc9887352672769e61076.camel@posteo.de>
Date: Fri, 21 Nov 2025 21:09:40 +0000
From: Markus Probst <markus.probst@...teo.de>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Keycodes for Factory reset button and USB Copy Button

Hi Dmitry,

I am currently writing a "multi function device" driver for synology
NAS devices. They have an on-board chip that handles things like, leds,
fan speed, buzzer, proper shutdown/restart and button presses:

- Power button for shutdown

- Reset button for triggering a factory reset

- USB Copy button for transfering files between a usb stick (not
available on all devices).

With the exception of the Power button (KEY_POWER), I am not sure which
keycodes I should use for the buttons mentioned above in the driver.

What would you recommend?

Thanks
- Markus Probst