linux-kernel - Re: [PATCH v2] HID: Add Wireless Radio Control feature for Chicony devices

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Message-ID: <nycvar.YFH.7.76.2101071019010.13752@cbobk.fhfr.pm>
Date:   Thu, 7 Jan 2021 10:23:00 +0100 (CET)
From:   Jiri Kosina <jikos@...nel.org>
To:     Jian-Hong Pan <jhp@...lessos.org>
cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Chris Chiu <chiu@...lessos.org>, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux@...lessos.org
Subject: Re: [PATCH v2] HID: Add Wireless Radio Control feature for Chicony
 devices

On Wed, 23 Dec 2020, Jian-Hong Pan wrote:

> Some Chicony's keyboards support airplane mode hotkey (Fn+F2) with
> "Wireless Radio Control" feature. For example, the wireless keyboard
> [04f2:1236] shipped with ASUS all-in-one desktop.
> 
> After consulting Chicony for this hotkey, learned the device will send
> with 0x11 as the report ID and 0x1 as the value when the key is pressed
> down.
> 
> This patch maps the event as KEY_RFKILL.

I don't know how exactly does the report descriptor of that device look 
like, but is this not doable from userspace via setkeycode() (udev/systemd 
is shipping a lot of such mappings already -- see evdev/keyboard 
definitions in hwdb).

Thanks,

-- 
Jiri Kosina
SUSE Labs