> -----Original Message-----
> From: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
> Sent: 2020年11月15日 0:50
> To: Alice Guo <alice.guo@xxxxxxx>
> Cc: robh+dt@xxxxxxxxxx; shawnguo@xxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx;
> dl-linux-imx <linux-imx@xxxxxxx>; Peng Fan <peng.fan@xxxxxxx>;
> devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Subject: [EXT] Re: [PATCH v3 1/4] dt-bindings: soc: imx8m: add DT Binding doc
> for soc unique ID
>
> Caution: EXT Email
>
> On Fri, Nov 13, 2020 at 07:04:06PM +0800, Alice Guo wrote:
> > Add DT Binding doc for the Unique ID of i.MX 8M series.
> >
> > Signed-off-by: Alice Guo <alice.guo@xxxxxxx>
> > ---
> > .../devicetree/bindings/arm/fsl.yaml | 25
> +++++++++++++++++++
> > 1 file changed, 25 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/fsl.yaml
> > b/Documentation/devicetree/bindings/arm/fsl.yaml
> > index e4db0f9ed664..f4faebbb57da 100644
> > --- a/Documentation/devicetree/bindings/arm/fsl.yaml
> > +++ b/Documentation/devicetree/bindings/arm/fsl.yaml
> > @@ -901,6 +901,31 @@ properties:
> > - fsl,s32v234-evb # S32V234-EVB2 Customer
> Evaluation Board
> > - const: fsl,s32v234
> >
> > + soc:
> > + type: object
> > + properties:
> > + compatible:
> > + oneOf:
> > + - description: i.MX8M SoCs
> > + items:
> > + - enum:
> > + - fsl,imx8mm-soc
> > + - fsl,imx8mn-soc
> > + - fsl,imx8mp-soc
> > + - fsl,imx8mq-soc
> > + - const: simple-bus
> > +
> > + - description: Other SoCs
> > + items:
> > + - const: simple-bus
> > +
> > + nvmem-cells:
> > + maxItems: 1
> > + description: Phandle to the SOC Unique ID provided by a nvmem
> > + node
> > +
> > + nvmem-cells-names:
> > + const: soc_unique_id
> > +
> > additionalProperties: true
>
> The "soc" node should be required for these compatibles. Otherwise you will
> have to stay with this backwards-compatible-DTB-device-initcall-glue for many
> years... I think you can achieve it with allOf.
>
[Alice Guo]Hi,
I find that my description for compatible is ambiguous. There are two kinds of compatible of the "soc" node:
1. For dtsi files used for SoCs other than imx8m series SoCs and old version dtsi files used for imx8m series SoCs,
compatible of the "soc" node is "simple-bus".
2. For new version dtsi files used for imx8m series SoCs, compatible of the "soc" node is {"fsl,imx8mX-soc","simple-bus"}.
"nvmem-cell" is an optional property.
I do not understand what you mean. You mean that limit the compatible of "soc" node must include " fsl,imx8mX-soc" in new version dts files. Is my understanding correct?
Best regards,
Alice
> Best regards,
> Krzysztof
