linux-kernel - Re: [PATCH v4 12/12] dt-bindings: fsl-dma: fsl-edma: add edma3 compatible string

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Date:   Tue, 13 Jun 2023 13:19:24 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Frank Li <Frank.Li@....com>, vkoul@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        peng.fan@....com, joy.zou@....com, shenwei.wang@....com,
        imx@...ts.linux.dev
Subject: Re: [PATCH v4 12/12] dt-bindings: fsl-dma: fsl-edma: add edma3
 compatible string

On 12/06/2023 22:34, Frank Li wrote:
> Extend Freescale eDMA driver bindings to support eDMA3 IP blocks in
> i.MX8QM and i.MX8QXP SoCs. In i.MX93, both eDMA3 and eDMA4 are now.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  .../devicetree/bindings/dma/fsl,edma.yaml     | 24 +++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/dma/fsl,edma.yaml b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
> index 5fd8fc604261..14cea8a3f442 100644
> --- a/Documentation/devicetree/bindings/dma/fsl,edma.yaml
> +++ b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
> @@ -21,6 +21,10 @@ properties:
>        - enum:
>            - fsl,vf610-edma
>            - fsl,imx7ulp-edma
> +          - fsl,imx8qm-edma
> +          - fsl,imx8qm-adma
> +          - fsl,imx93-edma3
> +          - fsl,imx93-edma4
>        - items:
>            - const: fsl,ls1028a-edma
>            - const: fsl,vf610-edma
> @@ -101,6 +105,26 @@ allOf:
>          reg:
>            maxItems: 2
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            anyOf:

This is just enum.

> +              - const: fsl,imx8qm-edma
> +              - const: fsl,imx8qm-adma

Keep entries ordered alphabetically. In compatible list as well.

> +              - const: fsl,imx93-edma3
> +              - const: fsl,imx93-edma4
> +    then:
> +      properties:
> +        reg:
> +          maxItems: 1
> +        interrupts:
> +          minItems: 1
> +          maxItems: 64
> +        interrupt-names:
> +          minItems: 1
> +          maxItems: 64

It does not look like you tested the bindings, at least after quick
look. Please run `make dt_binding_check` (see
Documentation/devicetree/bindings/writing-schema.rst for instructions).
Maybe you need to update your dtschema and yamllint.

interrupts can be max 17, so just test it and you will see errors.

Why names are not listed? If you accept names like "candy" or
"elephant", then why having the names in the first place?

And what about clocks?

Best regards,
Krzysztof