linux-kernel - Re: [PATCH] Input: add SW_COVER_ATTACHED and SW_EXT_PEN

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Date:   Fri, 30 Oct 2020 16:41:13 +0100
From:   Sebastian Reichel <sre@...nel.org>
To:     Jungrae Kim <jryu.kim@...sung.com>
Cc:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        HyungJae Im <hj2.im@...sung.com>,
        "manivannan.sadhasivam@...aro.org" <manivannan.sadhasivam@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        "rydberg@...math.org" <rydberg@...math.org>
Subject: Re: [PATCH] Input: add SW_COVER_ATTACHED and SW_EXT_PEN_ATTACHED

Hi,

On Fri, Oct 30, 2020 at 10:15:52PM +0900, Jungrae Kim wrote:
> From 23aed4567e234b7e108c31abadb9f3a3ccccf7d2 Mon Sep 17 00:00:00 2001
> From: Jungrae Kim <jryu.kim@...sung.com>
> Date: Fri, 30 Oct 2020 21:23:12 +0900
> Subject: [PATCH] Input: add SW_COVER_ATTACHED and SW_EXT_PEN_ATTACHED
> 
> SW_COVER_ATTACHED represents the connected state of a removable cover
> of a device. Value 0 means cover was attached with device, value 1 means
> removed it.

Any reason against using SW_MACHINE_COVER? That was introduced for Nokia
N900, where you actually remove the cover to access battery/SD card/
SIM card (so there is state 0 = cover removed/open and state 1 = cover
attached/closed).

-- Sebastian

> SW_EXT_PEN_ATTACHED represents the state of the pen.
> Some device have internal pen slot. but other some device have external pen
> slot. These two cases has different use case in userspace. So need to
> separate a event. Value 0 means pen was detach on external pen slot on
> device, value 1 means pen was attached external pen slot on device.
> 
> Signed-off-by: Jungrae Kim <jryu.kim@...sung.com>
> ---
>  include/linux/mod_devicetable.h        | 2 +-
>  include/uapi/linux/input-event-codes.h | 4 +++-
>  2 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
> index 5b08a473cdba..897f5a3e7721 100644
> --- a/include/linux/mod_devicetable.h
> +++ b/include/linux/mod_devicetable.h
> @@ -320,7 +320,7 @@ 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         0x12
>  #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 ee93428ced9a..a0506369de6d 100644
> --- a/include/uapi/linux/input-event-codes.h
> +++ b/include/uapi/linux/input-event-codes.h
> @@ -893,7 +893,9 @@
>  #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_COVER_ATTACHED      0x11  /* set = cover attached */
> +#define SW_EXT_PEN_ATTACHED    0x12  /* set = external pen attached */
> +#define SW_MAX                 0x12
>  #define SW_CNT                 (SW_MAX+1)
> 
>  /*
> -- 
> 2.17.1

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