linux-kernel - Re: [PATCH v2 12/12] dt-bindings: fsl-dma: fsl-edma: add edma3 compatible string

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Message-ID: <65e7b6df-b83b-2d7c-5093-f5822050827a@linaro.org>
Date:   Tue, 30 May 2023 15:08:48 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Frank Li <Frank.Li@....com>, krzysztof.kozlowski+dt@...aro.org,
        peng.fan@....com, vkoul@...nel.org
Cc:     devicetree@...r.kernel.org, dmaengine@...r.kernel.org,
        imx@...ts.linux.dev, joy.zou@....com, linux-kernel@...r.kernel.org,
        robh+dt@...nel.org, shenwei.wang@....com
Subject: Re: [PATCH v2 12/12] dt-bindings: fsl-dma: fsl-edma: add edma3
 compatible string

On 29/05/2023 22:04, 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     | 20 +++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/dma/fsl,edma.yaml b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
> index 5fd8fc604261..eed12687b0c9 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

What are these last two? What is "3" and "4"?

>        - items:
>            - const: fsl,ls1028a-edma
>            - const: fsl,vf610-edma
> @@ -101,6 +105,22 @@ allOf:
>          reg:
>            maxItems: 2
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            anyOf:
> +              - const: fsl,imx8qm-edma
> +              - const: fsl,imx8qm-adma
> +              - const: fsl,imx93-edma3
> +              - const: fsl,imx93-edma4
> +    then:
> +      properties:
> +        reg:
> +          maxItems: 1
> +        interrupts:
> +          maxItems: 64

That's odd. What about the names? What about minItems? Anyway, this
wasn't tested - you will have failures with dtbs_check.



Best regards,
Krzysztof