linux-kernel - Re: [PATCH v2 02/30] pinctrl: mediatek: reuse pinctrl driver for mt7623

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Message-ID: <1493621047.32195.4.camel@mtkswgap22>
Date:   Mon, 1 May 2017 14:44:07 +0800
From:   Sean Wang <sean.wang@...iatek.com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        John Crispin <john@...ozen.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 02/30] pinctrl: mediatek: reuse pinctrl driver for
 mt7623

On Fri, 2017-04-28 at 10:01 +0200, Linus Walleij wrote:
> On Wed, Apr 26, 2017 at 11:25 AM,  <sean.wang@...iatek.com> wrote:
> 
> > From: Sean Wang <sean.wang@...iatek.com>
> >
> > mt7623 pinctrl driver can be compatible with mt2701 one,
> > so the patch reuses the driver and deletes those redundant
> > ones.
> >
> > Cc: John Crispin <john@...ozen.org>
> > Signed-off-by: Sean Wang <sean.wang@...iatek.com>
> 
> Partly correct.
> 
> >         "mediatek,mt6397-pinctrl", compatible with mt6397 pinctrl.
> > -       "mediatek,mt7623-pinctrl", compatible with mt7623 pinctrl.
> 
> NO don't do this.
> 
> "compatible" means exactly this: this hardware is compatible with
> this driver. That is why we have it!
> 
> So instead of mt7623 pretending to be mt2701, let the mt2701 driver
> list that it is compatible with mt7623, simple.
> 
> So patch pinctrl-mt2701.c mt2701_pctrl_match[] instead.
> 

Hi Linus,

really appreciate your clear guidance and reviewing on this

I will fix it up in the next version
	
	Sean

> Yours,
> Linus Walleij