linux-kernel - Re: [PATCH 2/6] dt-bindings: dma: qcom,bam: Document dma-coherent property

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Message-ID: <572630ae-50bb-4575-8885-1d97b602ca8f@kernel.org>
Date: Thu, 13 Mar 2025 15:50:08 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Kaushal Kumar <quic_kaushalk@...cinc.com>, vkoul@...nel.org,
 robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 manivannan.sadhasivam@...aro.org, miquel.raynal@...tlin.com, richard@....at,
 vigneshr@...com, andersson@...nel.org, konradybcio@...nel.org,
 agross@...nel.org
Cc: linux-arm-msm@...r.kernel.org, dmaengine@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-mtd@...ts.infradead.org
Subject: Re: [PATCH 2/6] dt-bindings: dma: qcom,bam: Document dma-coherent
 property

On 13/03/2025 14:09, Kaushal Kumar wrote:
> SDX75 BAM DMA controller has DMA-coherent support so define
> it in the properties section, without which 'dtbs_check'
> reports the following error:
> 
>   controller@...c000: 'dma-coherent' does not match any of the
>   regexes: 'pinctrl-[0-9]+'

How can I reproduce it?

> 

Fixes tag?

> Signed-off-by: Kaushal Kumar <quic_kaushalk@...cinc.com>
> ---
>  Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml b/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml
> index 3ad0d9b1fbc5..c4dd6a503964 100644
> --- a/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml
> +++ b/Documentation/devicetree/bindings/dma/qcom,bam-dma.yaml
> @@ -39,6 +39,8 @@ properties:
>    "#dma-cells":
>      const: 1
>  
> +  dma-coherent: true
> +

Which devices are DMA coherent?


Best regards,
Krzysztof