[PATCH v5 3/3] ARM: dts: sun8i-r40: Add thermal trip points/cooling maps
From: <hidden>
Date: 2022-05-17 01:38:09
Also in:
linux-devicetree, linux-pm, linux-sunxi, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: qianfan Zhao <redacted> 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 <redacted> --- arch/arm/boot/dts/sun8i-r40.dtsi | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/arch/arm/boot/dts/sun8i-r40.dtsi b/arch/arm/boot/dts/sun8i-r40.dtsi
index ae2a5ebd9924..b43f3f72a915 100644
--- a/arch/arm/boot/dts/sun8i-r40.dtsi
+++ b/arch/arm/boot/dts/sun8i-r40.dtsi@@ -86,6 +86,7 @@ cpu0: cpu@0 { reg = <0>; clocks = <&ccu CLK_CPU>; clock-names = "cpu"; + #cooling-cells = <2>; }; cpu1: cpu@1 {
@@ -94,6 +95,7 @@ cpu1: cpu@1 { reg = <1>; clocks = <&ccu CLK_CPU>; clock-names = "cpu"; + #cooling-cells = <2>; }; cpu2: cpu@2 {
@@ -102,6 +104,7 @@ cpu2: cpu@2 { reg = <2>; clocks = <&ccu CLK_CPU>; clock-names = "cpu"; + #cooling-cells = <2>; }; cpu3: cpu@3 {
@@ -110,6 +113,7 @@ cpu3: cpu@3 { reg = <3>; clocks = <&ccu CLK_CPU>; clock-names = "cpu"; + #cooling-cells = <2>; }; };
@@ -125,6 +129,30 @@ 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 {
--
2.25.1
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