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From:   Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To:     yuq825@gmail.com, dri-devel@lists.freedesktop.org
Cc:     airlied@linux.ie, daniel@ffwll.ch, linux-kernel@vger.kernel.org,
        tomeu.vizoso@collabora.com, robh@kernel.org, steven.price@arm.com,
        alyssa.rosenzweig@collabora.com, linux-amlogic@lists.infradead.org,
        linux-rockchip@lists.infradead.org, wens@csie.org,
        linux-pm@vger.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: [PATCH RFC v3 1/2] dt-bindings: gpu: mali-utgard: Add the #cooling-cells property
Date:   Sat, 22 Feb 2020 23:04:31 +0100
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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@googlemail.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>;
     };
 
 ...
-- 
2.25.1