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

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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: qianfan Zhao <qianfanguijin@163.com>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Tested-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220517013607.2252-4-qianfanguijin@163.com
This commit is contained in:
qianfan Zhao 2022-05-17 09:36:07 +08:00 committed by Jernej Skrabec
parent 14dbef6772
commit 7d655166db
1 changed files with 28 additions and 0 deletions
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28
arch/arm/boot/dts/sun8i-r40.dtsi
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@ -87,6 +87,7 @@
reg = <0>;
clocks = <&ccu CLK_CPU>;
clock-names = "cpu";
#cooling-cells = <2>;
};
cpu1: cpu@1 {
@ -95,6 +96,7 @@
reg = <1>;
clocks = <&ccu CLK_CPU>;
clock-names = "cpu";
#cooling-cells = <2>;
};
cpu2: cpu@2 {
@ -103,6 +105,7 @@
reg = <2>;
clocks = <&ccu CLK_CPU>;
clock-names = "cpu";
#cooling-cells = <2>;
};
cpu3: cpu@3 {
@ -111,6 +114,7 @@
reg = <3>;
clocks = <&ccu CLK_CPU>;
clock-names = "cpu";
#cooling-cells = <2>;
};
};
@ -126,6 +130,30 @@
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 {