linux-kernel - Re: [PATCH v1 1/4] LF-2571-1: dt-bindings: soc: imx8m: add DT Binding doc for soc unique ID

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Message-ID: <CAJKOXPewEVsPUoC4w_aku=pDG=FzyajwfK42yPQ15K-vA-brtw@mail.gmail.com>
Date:   Wed, 4 Nov 2020 09:02:15 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Alice Guo <alice.guo@....com>
Cc:     shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org, peng.fan@....com
Subject: Re: [PATCH v1 1/4] LF-2571-1: dt-bindings: soc: imx8m: add DT Binding
 doc for soc unique ID

On Wed, 4 Nov 2020 at 08:58, Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On Wed, 4 Nov 2020 at 04:09, Alice Guo <alice.guo@....com> wrote:
> >
> > Add DT Binding doc for the Unique ID of i.MX 8M series.
> >
> > Signed-off-by: Alice Guo <alice.guo@....com>
> > ---
> >  .../bindings/soc/imx/imx8m-unique-id.yaml     | 32 +++++++++++++++++++
> >  1 file changed, 32 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/soc/imx/imx8m-unique-id.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/soc/imx/imx8m-unique-id.yaml b/Documentation/devicetree/bindings/soc/imx/imx8m-unique-id.yaml
> > new file mode 100644
> > index 000000000000..f1e45458cec7
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/soc/imx/imx8m-unique-id.yaml
> > @@ -0,0 +1,32 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/arm/nxp/imx8m-unique-id.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: NXP i.MX8M Platforms Device Tree Bindings
>
> This is not a title for these bindings. Please describe the bindings
> for this device. Based on description, this might could go to
> bindings/nvmem directory.
>
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:
>
> No need for oneOf.
>
> > +      - items:
> > +          - enum:
> > +              - fsl,imx8mm-soc
> > +              - fsl,imx8mn-soc
> > +              - fsl,imx8mp-soc
> > +              - fsl,imx8mq-soc
> > +          - const: simple-bus
> > +
> > +  nvmem-cells:
> > +    maxItems: 1
> > +    description:
> > +      Reference to an nvmem node for the SOC Unique ID.
>
> Misleading description - nvmem-cells do not contain a reference. Just
> skip it, nvmem-cells should be obvious from the nvmem provider
> bindings.
>
> > +
> > +  nvmem-cells-names:
> > +    const: soc_unique_id
>
> additionalProperties: false

... or what looks more appropriate - you should include nvmem-consumer
bindings and use unevaluatedProperties:false.

Best regards,
Krzysztof