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Subject[PATCH v2 5/8] arm64: dts: allwinner: h5: Add trip and cooling maps to CPU thermal zones
Date
From: Chen-Yu Tsai <wens@csie.org>

This enables passive cooling by down-regulating CPU voltage and frequency.
The trip points were copied from the H3.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi | 30 ++++++++++++++++++++
1 file changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
index 09523f6011c5..6735e316a39c 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
@@ -3,6 +3,8 @@

#include <arm/sunxi-h3-h5.dtsi>

+#include <dt-bindings/thermal/thermal.h>
+
/ {
cpus {
#address-cells = <1>;
@@ -15,6 +17,7 @@ cpu0: cpu@0 {
enable-method = "psci";
clocks = <&ccu CLK_CPUX>;
clock-latency-ns = <244144>; /* 8 32k periods */
+ #cooling-cells = <2>;
};

cpu1: cpu@1 {
@@ -24,6 +27,7 @@ cpu1: cpu@1 {
enable-method = "psci";
clocks = <&ccu CLK_CPUX>;
clock-latency-ns = <244144>; /* 8 32k periods */
+ #cooling-cells = <2>;
};

cpu2: cpu@2 {
@@ -33,6 +37,7 @@ cpu2: cpu@2 {
enable-method = "psci";
clocks = <&ccu CLK_CPUX>;
clock-latency-ns = <244144>; /* 8 32k periods */
+ #cooling-cells = <2>;
};

cpu3: cpu@3 {
@@ -42,6 +47,7 @@ cpu3: cpu@3 {
enable-method = "psci";
clocks = <&ccu CLK_CPUX>;
clock-latency-ns = <244144>; /* 8 32k periods */
+ #cooling-cells = <2>;
};
};

@@ -173,6 +179,30 @@ cpu_thermal: cpu-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 = <100000>;
+ 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 {
--
2.27.0
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