linux-kernel - Re: [PATCH v6 3/4] dt-bindings: arm: fsl: Add Kontron i.MX6UL N6310 compatibles

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Date:   Thu, 22 Aug 2019 07:51:51 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Schrempf Frieder <frieder.schrempf@...tron.de>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v6 3/4] dt-bindings: arm: fsl: Add Kontron i.MX6UL N6310 compatibles

On Wed, Aug 21, 2019 at 12:55 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On Tue, Aug 20, 2019 at 03:27:39PM -0500, Rob Herring wrote:
> > > I see. If I understand the schema correctly, this should look like:
> >
> > Looks correct, but a couple of comments.
> >
> > > diff --git a/Documentation/devicetree/bindings/arm/fsl.yaml b/Documentation/devicetree/bindings/arm/fsl.yaml
> > > index 7294ac36f4c0..eb263d1ccf13 100644
> > > --- a/Documentation/devicetree/bindings/arm/fsl.yaml
> > > +++ b/Documentation/devicetree/bindings/arm/fsl.yaml
> > > @@ -161,6 +161,22 @@ properties:
> > >          items:
> > >            - enum:
> > >                - fsl,imx6ul-14x14-evk      # i.MX6 UltraLite 14x14 EVK Board
> > > +              - kontron,imx6ul-n6310-som  # Kontron N6310 SOM
> >
> > Is the SOM ever used alone? If not, then no point in listing this here.
>
> SoM alone: no, because it requires some type of base board. However it
> will be used by some customer designs with some amount of
> changes/addons.
>
> Looking at other aproaches, usually SoMs have their own compatible.  In
> such case - I should document it somewhere.

I wasn't suggesting not having the compatible for it, but you don't
need it in this list because that is not valid. You have to list it
with the base board compatibles.

Rob