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 [thread overview]
Message-ID: <20200222220432.448115-2-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20200222220432.448115-1-martin.blumenstingl@googlemail.com>
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
next prev parent reply other threads:[~2020-02-22 22:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-22 22:04 [PATCH RFC v3 0/2] drm: lima: devfreq and cooling device support Martin Blumenstingl
2020-02-22 22:04 ` Martin Blumenstingl [this message]
2020-02-22 22:04 ` [PATCH RFC v3 2/2] drm/lima: Add optional " Martin Blumenstingl
2020-02-24 2:14 ` Qiang Yu
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