linux-kernel - Re: [PATCH v2 1/2] dt-bindings: dma: ti: Add J721S2 BCDMA

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Date:   Fri, 5 May 2023 14:29:35 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Vaishnav Achath <vaishnav.a@...com>,
        krzysztof.kozlowski+dt@...aro.org, peter.ujfalusi@...il.com,
        robh+dt@...nel.org, vkoul@...nel.org
Cc:     devicetree@...r.kernel.org, dmaengine@...r.kernel.org,
        j-choudhary@...com, linux-kernel@...r.kernel.org, u-kumar1@...com,
        vigneshr@...com
Subject: Re: [PATCH v2 1/2] dt-bindings: dma: ti: Add J721S2 BCDMA

On 05/05/2023 10:26, Vaishnav Achath wrote:
> Add bindings for J721S2 BCDMA instance dedicated for Camera
> Serial Interface. Unlike AM62A CSI BCDMA, this instance has RX
> and TX channels but lacks block copy channels.
> 
> Signed-off-by: Vaishnav Achath <vaishnav.a@...com>
> ---
> 
> V1->V2:
>      * Move J721S2 BCDMA entry to else condition to avoid failure
>      with AM62A BCDMA.
> 
>  .../devicetree/bindings/dma/ti/k3-bcdma.yaml  | 54 +++++++++++++------
>  1 file changed, 39 insertions(+), 15 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> index beecfe7a1732..54d4b8e0c8ce 100644
> --- a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> +++ b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> @@ -33,6 +33,7 @@ properties:
>      enum:
>        - ti,am62a-dmss-bcdma-csirx
>        - ti,am64-dmss-bcdma
> +      - ti,j721s2-dmss-bcdma-csi
>  
>    reg:
>      minItems: 3
> @@ -152,21 +153,44 @@ allOf:
>          - power-domains
>  
>      else:
> -      properties:
> -        reg:
> -          minItems: 5
> -
> -        reg-names:
> -          items:
> -            - const: gcfg
> -            - const: bchanrt
> -            - const: rchanrt
> -            - const: tchanrt
> -            - const: ringrt
> -
> -      required:
> -        - ti,sci-rm-range-bchan
> -        - ti,sci-rm-range-tchan
> +      if:
> +        properties:
> +          compatible:
> +            contains:
> +              const: ti,j721s2-dmss-bcdma-csi
> +      then:
> +        properties:
> +          ti,sci-rm-range-bchan: false
> +
> +          reg:
> +            maxItems: 4
> +
> +          reg-names:
> +            items:
> +              - const: gcfg
> +              - const: rchanrt
> +              - const: tchanrt
> +              - const: ringrt
> +
> +        required:
> +          - ti,sci-rm-range-tchan
> +
> +      else:

Avoid if:else:if:else and alike. I asked to add one more if covering
this case.

Best regards,
Krzysztof