linux-kernel - Re: [PATCH v3] dt-bindings: dma: xilinx: Add power-domains to xlnx,zynqmp-dpdma

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Date:   Fri, 12 May 2023 16:30:25 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Michal Simek <michal.simek@....com>
Cc:     linux-kernel@...r.kernel.org, monstr@...str.eu,
        michal.simek@...inx.com, git@...inx.com,
        Conor Dooley <conor+dt@...nel.org>,
        Hyun Kwon <hyun.kwon@...inx.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Vinod Koul <vkoul@...nel.org>, devicetree@...r.kernel.org,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3] dt-bindings: dma: xilinx: Add power-domains to
 xlnx,zynqmp-dpdma

Hi Michal,

Thank you for the patch.

On Fri, May 12, 2023 at 01:40:33PM +0200, Michal Simek wrote:
> DP DMA has own power domain that's why describe required power-domain
> property.
> 
> Signed-off-by: Michal Simek <michal.simek@....com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
> 
> Changes in v3:
> - make power-domains as required property
> - also update commit message
> 
> Changes in v2:
> - rewrite commit message - requested by Krzysztof
> 
> The commit b06112cd5e08 ("arm64: dts: zynqmp: Add power domain for the
> DisplayPort DMA controller") added this property already in Linux that's
> why the patch is also fixing dts_check warnings.
> 
> In v2 I got ack from Krzysztof but not adding it because of additional
> discussion about required property in v3.
> https://lore.kernel.org/r/029ba923-d13e-ea7c-018d-95e179dda2e5@linaro.org
> 
> ---
>  .../devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml   | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
> index d6cbd95ec26d..2128f4645c98 100644
> --- a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
> +++ b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
> @@ -41,6 +41,9 @@ properties:
>    clock-names:
>      const: axi_clk
>  
> +  power-domains:
> +    maxItems: 1
> +
>  required:
>    - "#dma-cells"
>    - compatible
> @@ -48,12 +51,14 @@ required:
>    - interrupts
>    - clocks
>    - clock-names
> +  - power-domains
>  
>  additionalProperties: false
>  
>  examples:
>    - |
>      #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/power/xlnx-zynqmp-power.h>
>  
>      dma: dma-controller@...c0000 {
>        compatible = "xlnx,zynqmp-dpdma";
> @@ -63,6 +68,7 @@ examples:
>        clocks = <&dpdma_clk>;
>        clock-names = "axi_clk";
>        #dma-cells = <1>;
> +      power-domains = <&zynqmp_firmware PD_DP>;
>      };
>  
>  ...

-- 
Regards,

Laurent Pinchart