linux-kernel - Re: [PATCH v2] dt-bindings: dma: arm,pl330: Add missing 'iommus' property

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Message-ID: <20220902160656.GA4168277-robh@kernel.org>
Date:   Fri, 2 Sep 2022 11:06:56 -0500
From:   Rob Herring <robh@...nel.org>
To:     Vinod Koul <vkoul@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] dt-bindings: dma: arm,pl330: Add missing 'iommus'
 property

On Mon, Aug 01, 2022 at 03:02:37PM -0600, Rob Herring wrote:
> The pl330 can be behind an IOMMU which is the case for Arm Juno board.
> Add the 'iommus' property allowing for 1 IOMMU entry per channel for
> writes and 1 IOMMU entry for reads.
> 
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
> v2:
>  - Include IOMMU entry for read channel
> ---
>  Documentation/devicetree/bindings/dma/arm,pl330.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)

Ping!

> 
> diff --git a/Documentation/devicetree/bindings/dma/arm,pl330.yaml b/Documentation/devicetree/bindings/dma/arm,pl330.yaml
> index 2bec69b308f8..4a3dd6f5309b 100644
> --- a/Documentation/devicetree/bindings/dma/arm,pl330.yaml
> +++ b/Documentation/devicetree/bindings/dma/arm,pl330.yaml
> @@ -55,6 +55,12 @@ properties:
>  
>    dma-coherent: true
>  
> +  iommus:
> +    minItems: 1
> +    maxItems: 9
> +    description: Up to 1 IOMMU entry per DMA channel for writes and 1
> +      IOMMU entry for reads.
> +
>    power-domains:
>      maxItems: 1
>  
> -- 
> 2.34.1
> 
>