linux-kernel - Re: [PATCH v8 4/6] dt-bindings: MIPS: Document Ingenic SoCs binding.

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Date:   Tue, 26 May 2020 13:29:47 -0600
From:   Rob Herring <robh@...nel.org>
To:     周琰杰 (Zhou Yanjie) 
        <zhouyanjie@...yeetech.com>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, tsbogend@...ha.franken.de,
        paulburton@...nel.org, jiaxun.yang@...goat.com, chenhc@...ote.com,
        tglx@...utronix.de, daniel.lezcano@...aro.org,
        keescook@...omium.org, paul@...pouillou.net, krzk@...nel.org,
        hns@...delico.com, ebiederm@...ssion.com,
        dongsheng.qiu@...enic.com, yanfei.li@...enic.com,
        rick.tyliu@...enic.com, sernia.zhou@...mail.com,
        zhenwenjin@...il.com
Subject: Re: [PATCH v8 4/6] dt-bindings: MIPS: Document Ingenic SoCs binding.

On Tue, May 19, 2020 at 10:35:21PM +0800, 周琰杰 (Zhou Yanjie) wrote:
> Document the available properties for the SoC root node and the
> CPU nodes of the devicetree for the Ingenic XBurst SoCs.
> 
> Tested-by: H. Nikolaus Schaller <hns@...delico.com>
> Tested-by: Paul Boddie <paul@...die.org.uk>
> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@...yeetech.com>
> ---
> 
> Notes:
>     v1->v2:
>     Change the two Document from txt to yaml.
>     
>     v2->v3:
>     Fix formatting errors.
>     
>     v3->v4:
>     Fix bugs in the two yaml files.
>     
>     v4->v5:
>     No change.
>     
>     v5->v6:
>     Rewrite the two yaml files.
>     
>     v6->v7:
>     1.Update compatible strings in "ingenic,cpu.yaml".
>     2.Fix formatting errors, and enum for compatible strings.
>     3.Remove unnecessary "ingenic,soc.yaml".
>     
>     v7->v8:
>     No change.
> 
>  .../bindings/mips/ingenic/ingenic,cpu.yaml         | 57 ++++++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml b/Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml
> new file mode 100644
> index 00000000..afb0207
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mips/ingenic/ingenic,cpu.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mips/ingenic/ingenic,cpu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Bindings for Ingenic XBurst family CPUs
> +
> +maintainers:
> +  - 周琰杰 (Zhou Yanjie) <zhouyanjie@...yeetech.com>
> +
> +description:
> +  Ingenic XBurst family CPUs shall have the following properties.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +
> +      - description: Ingenic XBurst®1 CPU Cores
> +        items:

This is a single compatible string, right? If so, drop items. 

> +          enum:
> +            - ingenic,xburst-mxu1.0
> +            - ingenic,xburst-fpu1.0-mxu1.1
> +            - ingenic,xburst-fpu2.0-mxu2.0
> +
> +      - description: Ingenic XBurst®2 CPU Cores
> +        items:
> +          enum:
> +            - ingenic,xburst2-fpu2.1-mxu2.1-smt

Just: const: ingenic,xburst2-fpu2.1-mxu2.1-smt

Continuing to append CPU features isn't going to scale well. Does 
'xburst2' imply certain features? If so, not really any need to have 
them be explicit.

> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - device_type
> +  - compatible
> +  - reg
> +
> +examples:
> +  - |
> +    cpus {
> +    	#address-cells = <1>;
> +    	#size-cells = <0>;
> +
> +    	cpu0: cpu@0 {
> +    		device_type = "cpu";
> +    		compatible = "ingenic,xburst-fpu1.0-mxu1.1";
> +    		reg = <0>;
> +    	};
> +
> +    	cpu1: cpu@1 {
> +    		device_type = "cpu";
> +    		compatible = "ingenic,xburst-fpu1.0-mxu1.1";
> +    		reg = <1>;
> +    	};
> +    };
> +...
> -- 
> 2.7.4
>