linux-kernel - Re: [PATCH v4 1/2] dt-bindings: gpu: mali-utgard: Add the #cooling-cells property

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Date:   Sun, 22 Mar 2020 10:23:38 +0800
From:   Qiang Yu <yuq825@...il.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Rob Herring <robh@...nel.org>,
        Steven Price <steven.price@....com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        linux-rockchip@...ts.infradead.org, Chen-Yu Tsai <wens@...e.org>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v4 1/2] dt-bindings: gpu: mali-utgard: Add the
 #cooling-cells property

Looks good for me, patch is:
Reviewed-by: Qiang Yu <yuq825@...il.com>

Regards,
Qiang

On Fri, Mar 20, 2020 at 4:35 AM Martin Blumenstingl
<martin.blumenstingl@...glemail.com> wrote:
>
> The GPU can be one of the big heat sources on a SoC. Allow the
> "#cooling-cells" property to be specified for ARM Mali Utgard GPUs so
> the GPU clock speeds (and voltages) can be reduced to prevent a SoC from
> overheating.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> ---
>  Documentation/devicetree/bindings/gpu/arm,mali-utgard.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-utgard.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-utgard.yaml
> index afde81be3c29..33548ca2a759 100644
> --- a/Documentation/devicetree/bindings/gpu/arm,mali-utgard.yaml
> +++ b/Documentation/devicetree/bindings/gpu/arm,mali-utgard.yaml
> @@ -107,6 +107,9 @@ properties:
>
>    operating-points-v2: true
>
> +  "#cooling-cells":
> +    const: 2
> +
>  required:
>    - compatible
>    - reg
> @@ -162,6 +165,7 @@ examples:
>        clocks = <&ccu 1>, <&ccu 2>;
>        clock-names = "bus", "core";
>        resets = <&ccu 1>;
> +      #cooling-cells = <2>;
>      };
>
>  ...
> --
> 2.25.2
>