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SubjectRe: [PATCH] FROMLIST: input: add 2 kind of switch
On Wed, Oct 21, 2020 at 07:10:35AM +0200, gregkh@linuxfoundation.org wrote:
> On Wed, Oct 21, 2020 at 12:12:16PM +0900, HyungJae Im wrote:
> > >From ec9859ee01b7bc0e04255971e0fe97348847dab7 Mon Sep 17 00:00:00 2001
>
> You sent this 3 times, why?
>
> And why is this in the body of the email, have you read the "how to send
> your first kernel patch" document at kernelnewbies.org?
>
> > From: "hj2.im" <hj2.im@samsung.com>
> > Date: Tue, 20 Oct 2020 16:57:04 +0900
> > Subject: [PATCH] FROMLIST: input: add 2 kind of switch
>
> What does "FROMLIST:" mean?
>
> >
> > We need support to various accessories on the device,
> > some switch does not exist in switch list.
> > So added switch for the following purpose.
> >
> > SW_COVER_ATTACHED is for the checking the cover
> > attached or not on the device. SW_EXT_PEN_ATTACHED is for the
> > checking the external pen attached or not on the device
> >
> > Signed-off-by: hj2.im <hj2.im@samsung.com>
>
> As per the kernel documentation, you need to use your real name here,
> please do so.
>
> > ---
> > 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 0c2e27d28e0a..8ca2acee1f92 100644
> > --- a/include/uapi/linux/input-event-codes.h
> > +++ b/include/uapi/linux/input-event-codes.h
> > @@ -889,7 +889,9 @@
> > #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 */
>
> Is there an in-kernel user for these values anywhere? Please submit
> this patch along with the users at the same time, otherwise this change
> makes no sense at all.

It kind of does, as nowadays most uses come from DT, not from
hard-coding in drivers. However I need to better understand the intended
use of this. How SW_COVER_ATTACHED differs from SW_MACHINE_COVER and the
same for SW_PEN_INSERTED SW_EXT_PEN_ATTACHED.

Thanks.

--
Dmitry

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