Commit 7d655166 authored by qianfan Zhao's avatar qianfan Zhao Committed by Jernej Skrabec
Browse files

ARM: dts: sun8i-r40: Add thermal trip points/cooling maps 



For the trip points, I used values from the BSP code.

The critical trip point value is 30°C above the maximum recommended
ambient temperature (85°C) for the SoC from the datasheet, so there's
some headroom even at such a high ambient temperature.

Signed-off-by: default avatarqianfan Zhao <qianfanguijin@163.com>
Reviewed-by: default avatarSamuel Holland <samuel@sholland.org>
Tested-by: default avatarSamuel Holland <samuel@sholland.org>
Signed-off-by: default avatarJernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220517013607.2252-4-qianfanguijin@163.com
parent 14dbef67

arch/arm/boot/dts/sun8i-r40.dtsi

+28 −0
Original line number Diff line number Diff line
@@ -87,6 +87,7 @@ cpu0: cpu@0 { 
			reg = <0>;

			clocks = <&ccu CLK_CPU>;

			clock-names = "cpu";

			#cooling-cells = <2>;

		};



		cpu1: cpu@1 {
@@ -95,6 +96,7 @@ cpu1: cpu@1 { 
			reg = <1>;

			clocks = <&ccu CLK_CPU>;

			clock-names = "cpu";

			#cooling-cells = <2>;

		};



		cpu2: cpu@2 {
@@ -103,6 +105,7 @@ cpu2: cpu@2 { 
			reg = <2>;

			clocks = <&ccu CLK_CPU>;

			clock-names = "cpu";

			#cooling-cells = <2>;

		};



		cpu3: cpu@3 {
@@ -111,6 +114,7 @@ cpu3: cpu@3 { 
			reg = <3>;

			clocks = <&ccu CLK_CPU>;

			clock-names = "cpu";

			#cooling-cells = <2>;

		};

	};
@@ -126,6 +130,30 @@ cpu_thermal: cpu0-thermal { 
			polling-delay-passive = <0>;

			polling-delay = <0>;

			thermal-sensors = <&ths 0>;



			trips {

				cpu_hot_trip: cpu-hot {

					temperature = <80000>;

					hysteresis = <2000>;

					type = "passive";

				};



				cpu_very_hot_trip: cpu-very-hot {

					temperature = <115000>;

					hysteresis = <0>;

					type = "critical";

				};

			};



			cooling-maps {

				cpu-hot-limit {

					trip = <&cpu_hot_trip>;

					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,

							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,

							 <&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,

							 <&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

				};

			};

		};



		gpu_thermal: gpu-thermal {