linux-kernel - Re: (3) [PATCH v2] input: add 2 kind of switch

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Message-ID: <20201030112812epcms1p7d031bb4949b319135e48dfac9409743b@epcms1p7>
Date:   Fri, 30 Oct 2020 20:28:12 +0900
From:   Jungrae Kim <jryu.kim@...sung.com>
To:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        HyungJae Im <hj2.im@...sung.com>
CC:     "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>,
        Jungrae Kim <jryu.kim@...sung.com>
Subject: Re: (3) [PATCH v2] input: add 2 kind of switch

> On Fri, Oct 30, 2020 at 01:39:16PM +0900, HyungJae Im wrote:
> > Hello, This is Hyungjae Im from Samsung Electronics.
> > Let me answer your questions inline.
> > 
> > >On Thu, Oct 29, 2020 at 10:27:47PM +0900, HyungJae Im wrote:
> > >> From: "hj2.im" <hj2.im@...sung.com>
> > >> Date: Thu, 29 Oct 2020 22:11:24 +0900
> > >> Subject: [PATCH v2] input: add 2 kind of switch
> > > 
> > >Why is this in the body of that patch?
> > 
> > I read "how to send your first kernel patch", but still making so many mistakes.
> > I will be cautious with this.
> >  
> > >> 
> > >> 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
> > > 
> > >You didn't answer the previous question as to why the existing values do
> > >not work for you instead of having to create new ones?
> > 
> >  I think I should clarify this part the most for this review.
> >  As you know, new added events both has similar existing events,
> >  but it has to operate separately.
> > 
> >  First, SW_COVER_ATTACHED is similar with SW_MACHINE_COVER.
> >  We need two events for our cover interaction.
> >  One is to detect if flip cover is open/closed(covers screen or not),
> >  and one is for detecting if cover is attached(detect if device is put into cover).
> >  With the second event, we send event for attachment and start authentication
> >  distinguishing if it was Samsung made cover.
> > 
> >  Second, SW_EXT_PEN_ATTACHED detects if pen is attached externally on tablet models.
> >  It is different with SW_PEN_INSERTED since this is detecting pens like our NOTE series.
> >  SW_EXT_PEN_ATTACHED has an unique role to set wacom tuning table differently
> >  while pen is attached/detached.
>  
> All of that needs to go in the changelog text for the individual patches
> when you submit them.
>  
> But as Dmitry pointed out, it doesn't look like either of these drivers
> are needed at all, just use the gpio-keys driver instead.
>  
> thanks,
>  
> greg k-h
 
Can you accept V1 patch? or need to add a change of device tree?
Please let me know what do I do now.