linux-kernel - [PATCH v3 3/3] dt-bindings: drm/msm/gpu: Add cooling device support

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Message-Id: <1603892395-3570-3-git-send-email-akhilpo@codeaurora.org>
Date:   Wed, 28 Oct 2020 19:09:54 +0530
From:   Akhil P Oommen <akhilpo@...eaurora.org>
To:     freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org
Cc:     robh@...nel.org, dri-devel@...edesktop.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        jcrouse@...eaurora.org, mka@...omium.org, robdclark@...il.com,
        dianders@...omium.org
Subject: [PATCH v3 3/3] dt-bindings: drm/msm/gpu: Add cooling device support

Add cooling device support to gpu. A cooling device is bound to a
thermal zone to allow thermal mitigation.

Signed-off-by: Akhil P Oommen <akhilpo@...eaurora.org>
---
 Documentation/devicetree/bindings/display/msm/gpu.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/msm/gpu.txt b/Documentation/devicetree/bindings/display/msm/gpu.txt
index 1af0ff1..090dcb3 100644
--- a/Documentation/devicetree/bindings/display/msm/gpu.txt
+++ b/Documentation/devicetree/bindings/display/msm/gpu.txt
@@ -39,6 +39,10 @@ Required properties:
         a4xx Snapdragon SoCs. See
         Documentation/devicetree/bindings/sram/qcom,ocmem.yaml.
 
+Optional properties:
+- #cooling-cells: The value must be 2. For details, please refer
+	Documentation/devicetree/bindings/thermal/thermal-cooling-devices.yaml.
+
 Example 3xx/4xx:
 
 / {
@@ -61,6 +65,7 @@ Example 3xx/4xx:
 		power-domains = <&mmcc OXILICX_GDSC>;
 		operating-points-v2 = <&gpu_opp_table>;
 		iommus = <&gpu_iommu 0>;
+		#cooling-cells = <2>;
 	};
 
 	gpu_sram: ocmem@...00000 {
@@ -98,6 +103,8 @@ Example a6xx (with GMU):
 		reg = <0x5000000 0x40000>, <0x509e000 0x10>;
 		reg-names = "kgsl_3d0_reg_memory", "cx_mem";
 
+		#cooling-cells = <2>;
+
 		/*
 		 * Look ma, no clocks! The GPU clocks and power are
 		 * controlled entirely by the GMU
-- 
2.7.4