linux-kernel - Re: [PATCH 13/14] dt-bindings: dma: dma350: Support ARM DMA-250

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Message-ID: <0aea52e1-4bfa-43ca-a527-f3ae198118dc@kernel.org>
Date: Sat, 23 Aug 2025 18:11:35 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Jisheng Zhang <jszhang@...nel.org>, Vinod Koul <vkoul@...nel.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Robin Murphy <robin.murphy@....com>
Cc: dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/14] dt-bindings: dma: dma350: Support ARM DMA-250

On 23/08/2025 17:40, Jisheng Zhang wrote:
> Compared with ARM DMA-350, DMA-250 is a simplified version, they share
> many common parts, but they do have difference. The difference will be
> handled in next driver patch, while let's add DMA-250 compatible string
> to dt-binding now.
> 
> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> ---
>  Documentation/devicetree/bindings/dma/arm,dma-350.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/dma/arm,dma-350.yaml b/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
> index 94752516e51a..d49736b7de5e 100644
> --- a/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
> +++ b/Documentation/devicetree/bindings/dma/arm,dma-350.yaml
> @@ -15,6 +15,7 @@ allOf:
>  properties:
>    compatible:
>      const: arm,dma-350
> +    const: arm,dma-250

This obviously cannot work and was NEVER tested. Please test your code
before you send it to mailing lists.

Best regards,
Krzysztof