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: <DB6PR0402MB27608D5A8A11C2D3779C4D0188EF0@DB6PR0402MB2760.eurprd04.prod.outlook.com>
Date:   Wed, 4 Nov 2020 08:04:39 +0000
From:   Peng Fan <peng.fan@....com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Alice Guo <alice.guo@....com>
CC:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v1 1/4] LF-2571-1: dt-bindings: soc: imx8m: add DT Binding
 doc for soc unique ID

> 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 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
> > +---
> > +$id:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fschemas%2Farm%2Fnxp%2Fimx8m-unique-id.yaml%23&amp
> ;data=0
> >
> +4%7C01%7Cpeng.fan%40nxp.com%7Ccd23b4c8f61c4cea5fec08d8809774b7
> %7C686e
> >
> +a1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637400735282634119%7C
> Unknown%7
> >
> +CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haW
> wiLCJX
> >
> +VCI6Mn0%3D%7C1000&amp;sdata=I8IcySWYAmFhlm7xNoUyptxR2cxMAfY
> APv6bf%2Bp
> > +cHG8%3D&amp;reserved=0
> > +$schema:
> > +https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevi
> >
> +cetree.org%2Fmeta-schemas%2Fcore.yaml%23&amp;data=04%7C01%7Cpe
> ng.fan%
> >
> +40nxp.com%7Ccd23b4c8f61c4cea5fec08d8809774b7%7C686ea1d3bc2b4c6
> fa92cd9
> >
> +9c5c301635%7C0%7C0%7C637400735282634119%7CUnknown%7CTWFpb
> GZsb3d8eyJWI
> >
> +joiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7
> C1000&
> >
> +amp;sdata=m8T4UAOIn3fDhO5OUrXygT%2BRmwwZXQW9dC5zFQaXl9Q%3
> D&amp;reserv
> > +ed=0
> > +
> > +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.

It might be misleading here. I think the bindings is for SoC, just like
"arm,realview-eb-soc" in
Documentation/devicetree/bindings/arm/arm,realview.yaml

Reading the patch, it is to convert soc-imx8m.c to platform driver,
so need to add a compatible string for the soc device,
I think Documentation/devicetree/bindings/arm/fsl.yaml should be
a better place.

Regards,
Peng.

> 
> > +
> > +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
> 
> 
> Best regards,
> Krzysztof