linux-kernel - Re: [PATCH 2/3] arm64: dts: mt2712: add pintcrl device node.

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Message-ID: <CACRpkdaX0n7BZVkXYFEh_XSN3P7huvhE6j5My=p=2Lh45oFZaQ@mail.gmail.com>
Date:   Thu, 21 Sep 2017 14:17:21 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Zhiyong Tao <zhiyong.tao@...iatek.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        srv_heupstream@...iatek.com,
        Liguo Zhang <liguo.zhang@...iatek.com>,
        "Joe.C" <yingjoe.chen@...iatek.com>, hongkun.cao@...iatek.com,
        Biao Huang <biao.huang@...iatek.com>,
        YT Shen <yt.shen@...iatek.com>,
        Hongzhou Yang <hongzhou.yang@...iatek.com>,
        Erin Lo <erin.lo@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH 2/3] arm64: dts: mt2712: add pintcrl device node.

On Thu, Sep 21, 2017 at 10:13 AM, Zhiyong Tao <zhiyong.tao@...iatek.com> wrote:
> On Tue, 2017-08-22 at 15:04 +0200, Linus Walleij wrote:
>> On Mon, Aug 14, 2017 at 5:23 PM, Matthias Brugger
>> <matthias.bgg@...il.com> wrote:
>> > On 07/31/2017 10:22 AM, Zhiyong Tao wrote:
>> >>
>> >> The commit includes two change:
>> >> 1)add pintcrl device node for mt2712.
>> >> 2)add pinfunc file for mt2712.
>> >>
>> >> Signed-off-by: Zhiyong Tao <zhiyong.tao@...iatek.com>
>> >> ---
>> >>   arch/arm64/boot/dts/mediatek/mt2712-pinfunc.h | 1014
>> >> +++++++++++++++++++++++++
>> >
>> >
>> > Shouldn't this file be in include/dt-bindings/pinctrl?
>>
>> Only if it is also #included in the driver.
>>
>> Yours,
>> Linus Walleij
>
> ==>
> Thanks for your comment.
> We see our some ICs(mt7623) which move the file to
> "include/dt-bindings/pinctrl". other ICs(mt2701) which is put in
> "arch/arm64/boot/dts/mediatek".
> In mt2712, mt2712-pinfunc.h is only include by dts file. It won't be
> included by driver. So which is better? "arch/arm64/boot/dts/mediatek/"
> or "include/dt-bindings/pinctrl".

If it is used in both arm and arm64 it is helpful to have it in
include/dt-bindings so it can be shared between the two
archs.

If it is just (ever) for arm64 it can stay inside the arch tree.

Yours,
Linus Walleij