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Date: Thu, 19 Mar 2020 21:34:26 +0100
From: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To: yuq825@...il.com, dri-devel@...ts.freedesktop.org
Cc: airlied@...ux.ie, daniel@...ll.ch, linux-kernel@...r.kernel.org,
tomeu.vizoso@...labora.com, robh@...nel.org, steven.price@....com,
alyssa.rosenzweig@...labora.com, linux-amlogic@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, wens@...e.org,
linux-pm@...r.kernel.org,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH v4 1/2] dt-bindings: gpu: mali-utgard: Add the #cooling-cells property
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
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