linux-kernel - Re: [PATCH 1/3] input: add event codes for user programmable switch events

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Date:   Thu, 30 Jun 2022 18:11:06 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Caleb Connolly <caleb@...nolly.tech>,
        Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        phone-devel@...r.kernel.org
Subject: Re: [PATCH 1/3] input: add event codes for user programmable switch
 events

On Mon 16 May 09:22 CDT 2022, Caleb Connolly wrote:

> Add SW_PROG{1,2,3,4} for device switches which are handled by userspace.
> 
> This can be used for devices with "generic" switches which are intended
> to be user-programmable, for example OnePlus phones contain a tri-state
> key which can be used for switching between mute/vibrate/ring, or
> programmed by the user to perform any arbitrary actions.
> 
> These are analogous to the keys KEY_PROG{1,2,3,4} found on some
> keyboards.
> 
> Signed-off-by: Caleb Connolly <caleb@...nolly.tech>

This looks reasonable to me.

Dmitry, what do you think?

Regards,
Bjorn

> ---
> See the next patch in this series for an example usecase.
> ---
>  include/linux/mod_devicetable.h        | 2 +-
>  include/uapi/linux/input-event-codes.h | 6 +++++-
>  2 files changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
> index 5da5d990ff58..45364fbeaaf7 100644
> --- a/include/linux/mod_devicetable.h
> +++ b/include/linux/mod_devicetable.h
> @@ -326,7 +326,7 @@ struct pcmcia_device_id {
>  #define INPUT_DEVICE_ID_LED_MAX		0x0f
>  #define INPUT_DEVICE_ID_SND_MAX		0x07
>  #define INPUT_DEVICE_ID_FF_MAX		0x7f
> -#define INPUT_DEVICE_ID_SW_MAX		0x10
> +#define INPUT_DEVICE_ID_SW_MAX		0x14
>  #define INPUT_DEVICE_ID_PROP_MAX	0x1f
> 
>  #define INPUT_DEVICE_ID_MATCH_BUS	1
> diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
> index dff8e7f17074..339153886a13 100644
> --- a/include/uapi/linux/input-event-codes.h
> +++ b/include/uapi/linux/input-event-codes.h
> @@ -917,7 +917,11 @@
>  #define SW_MUTE_DEVICE		0x0e  /* set = device disabled */
>  #define SW_PEN_INSERTED		0x0f  /* set = pen inserted */
>  #define SW_MACHINE_COVER	0x10  /* set = cover closed */
> -#define SW_MAX			0x10
> +#define SW_PROG1		0x11  /* set = program 1 (user defined) */
> +#define SW_PROG2		0x12  /* set = program 2 (user defined) */
> +#define SW_PROG3		0x13  /* set = program 3 (user defined) */
> +#define SW_PROG4		0x14  /* set = program 4 (user defined) */
> +#define SW_MAX			0x14
>  #define SW_CNT			(SW_MAX+1)
> 
>  /*
> --
> 2.36.1
> 
>