linux-kernel - Re: [PATCH v3 5/6] ARM: dts: Add support for emtrion emCON-MX6 series

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Message-ID: <CAL_JsqJ8TO+FadZraUNcCH6swTmwpWjdP5jV2JcoJT1Uf5Sw8g@mail.gmail.com>
Date:   Thu, 26 Apr 2018 08:46:14 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Türk, Jan <Jan.Tuerk@...rion.de>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Russell King <linux@...linux.org.uk>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        LinuxArmKernelMailingListe <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 5/6] ARM: dts: Add support for emtrion emCON-MX6 series

On Tue, Apr 24, 2018 at 3:32 AM, Türk, Jan <Jan.Tuerk@...rion.de> wrote:
>> -----Ursprüngliche Nachricht-----
>> Von: Shawn Guo Gesendet: Montag, 23. April 2018 10:45
>> Re: [PATCH v3 5/6] ARM: dts: Add support for emtrion emCON-MX6 series
>>
>> On Fri, Apr 20, 2018 at 02:50:52PM +0200, jan.tuerk@...rion.com wrote:
>> > From: Jan Tuerk <jan.tuerk@...rion.com>
>> >
>> > This patch adds support for the emtrion GmbH emCON-MX6 modules.
>> > They are available with imx.6 Solo, Dual-Lite, Dual and Quad equipped
>> > with Memory from 512MB to 2GB (configured by U-Boot).
>> >
>> > Our default developer-Kit ships with the Avari baseboard and the EDT
>> > ETM0700G0BDH6 Display (imx6[q|dl]-emcon-avari).
>> >
>> > The devicetree is split into the common part providing all module
>> > components and the basic support for all SoC versions
>> > (imx6qdl-emcon.dtsi) and parts which are i.mx6 S|DL and D|Q relevant.
>> > Finally the support for the avari baseboard in the developer-kit
>> > configuration is provided by the emcon-avari dts files.
>> >
>> > Signed-off-by: Jan Tuerk <jan.tuerk@...rion.com>
>> > ---
>> >  Documentation/devicetree/bindings/arm/emtrion.txt |  13 +
>>
>> It's better to have a separate patch for bindings doc, which needs to be
>> acknowledged by DT maintainers.
>
> I can change that, but nobody complained in the first 2 revisions of the patch.

Well, sometimes I forget to mention what is step 1 in
Documentation/devicetree/bindings/submitting-patches.txt.

> Also I though having the documentation is required for merging new bindings?

Yes, so binding patches come first (step 3).

>> >  arch/arm/boot/dts/Makefile                        |   2 +
>> >  arch/arm/boot/dts/imx6dl-emcon-avari.dts          | 224 ++++++
>> >  arch/arm/boot/dts/imx6dl-emcon.dtsi               |  27 +
>> >  arch/arm/boot/dts/imx6q-emcon-avari.dts           | 224 ++++++
>> >  arch/arm/boot/dts/imx6q-emcon.dtsi                |  27 +
>> >  arch/arm/boot/dts/imx6qdl-emcon.dtsi              | 838
>> ++++++++++++++++++++++
>> >  7 files changed, 1355 insertions(+)
>> >  create mode 100644 Documentation/devicetree/bindings/arm/emtrion.txt
>> >  create mode 100644 arch/arm/boot/dts/imx6dl-emcon-avari.dts
>> >  create mode 100644 arch/arm/boot/dts/imx6dl-emcon.dtsi
>> >  create mode 100644 arch/arm/boot/dts/imx6q-emcon-avari.dts
>> >  create mode 100644 arch/arm/boot/dts/imx6q-emcon.dtsi
>> >  create mode 100644 arch/arm/boot/dts/imx6qdl-emcon.dtsi

[...]

>> > +   };
>> > +
>> > +   boardID: pca8754a@3a {
>>
>> Please find a more generic node name for it.
>
> you mean boardID@3a?

No. "gpio@3a" as it is a gpio controller.

> This chip identifies the baseboard type for the bootloader.
>
>>
>> > +           compatible = "nxp,pca8574";
>> > +           reg = <0x3a>;
>> > +           gpio-controller;
>> > +           #gpio-cells = <1>;
>> > +   };