[RFC,v3,1/2] dt-bindings: gpu: mali-utgard: Add the #cooling-cells property
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Message ID 20200222220432.448115-2-martin.blumenstingl@googlemail.com
State Superseded
Headers show
Series
  • drm: lima: devfreq and cooling device support
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Commit Message

Martin Blumenstingl Feb. 22, 2020, 10:04 p.m. UTC
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(+)

Patch
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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>;
     };
 
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