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Message-ID: <YcNeXgRyxvIkcgiD@robh.at.kernel.org>
Date: Wed, 22 Dec 2021 13:20:30 -0400
From: Rob Herring <robh@...nel.org>
To: Thierry Reding <thierry.reding@...il.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
Jon Hunter <jonathanh@...dia.com>, devicetree@...r.kernel.org,
linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] dt-bindings: memory: tegra210: Mark EMC as cooling
device
On Fri, Dec 17, 2021 at 05:59:19PM +0100, Thierry Reding wrote:
> From: Thierry Reding <treding@...dia.com>
>
> The external memory controller found on Tegra210 can use throttling of
> the EMC frequency in order to reduce the memory chip temperature. Mark
> the memory controller as a cooling device to take advantage of this
> functionality.
>
> Signed-off-by: Thierry Reding <treding@...dia.com>
> ---
> .../bindings/memory-controllers/nvidia,tegra210-emc.yaml | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml
> index bc8477e7ab19..95c14deb8941 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml
> +++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra210-emc.yaml
> @@ -44,6 +44,11 @@ properties:
> description:
> phandle of the memory controller node
>
> +allOf:
> + - $ref: ../thermal/thermal-cooling-devices.yaml
/schemas/thermal/...
With that,
Reviewed-by: Rob Herring <robh@...nel.org>
> +
> +unevaluatedProperties: false
> +
> required:
> - compatible
> - reg
> @@ -51,8 +56,6 @@ required:
> - clock-names
> - nvidia,memory-controller
>
> -additionalProperties: false
> -
> examples:
> - |
> #include <dt-bindings/clock/tegra210-car.h>
> @@ -79,4 +82,5 @@ examples:
> interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
> memory-region = <&emc_table>;
> nvidia,memory-controller = <&mc>;
> + #cooling-cells = <2>;
> };
> --
> 2.34.1
>
>
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