diff mbox series

[v2,2/4] arm64: dts: allwinner: a64: add cooling maps and thermal tripping points

Message ID 20200108042018.571251-3-anarsoul@gmail.com
State New
Headers show
Series arm64: allwinner: a64: Enable DVFS on A64 | expand

Commit Message

Vasily Khoruzhick Jan. 8, 2020, 4:20 a.m. UTC 
Add cooling maps and thermal tripping points to prevent CPU overheating when
running at the highest frequency. Tripping points are taken from A33 dts since
A64 user manual doesn't mention when we should start throttling.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 77b33087866d..54a741f3cd8c 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -92,6 +92,7 @@  cpu0: cpu@0 {
 			next-level-cache = <&L2>;
 			clocks = <&ccu CLK_CPUX>;
 			clock-names = "cpu";
+			#cooling-cells = <2>;
 		};
 
 		cpu1: cpu@1 {
@@ -102,6 +103,7 @@  cpu1: cpu@1 {
 			next-level-cache = <&L2>;
 			clocks = <&ccu CLK_CPUX>;
 			clock-names = "cpu";
+			#cooling-cells = <2>;
 		};
 
 		cpu2: cpu@2 {
@@ -112,6 +114,7 @@  cpu2: cpu@2 {
 			next-level-cache = <&L2>;
 			clocks = <&ccu CLK_CPUX>;
 			clock-names = "cpu";
+			#cooling-cells = <2>;
 		};
 
 		cpu3: cpu@3 {
@@ -122,6 +125,7 @@  cpu3: cpu@3 {
 			next-level-cache = <&L2>;
 			clocks = <&ccu CLK_CPUX>;
 			clock-names = "cpu";
+			#cooling-cells = <2>;
 		};
 
 		L2: l2-cache {
@@ -226,6 +230,46 @@  cpu_thermal: cpu0-thermal {
 			polling-delay-passive = <0>;
 			polling-delay = <0>;
 			thermal-sensors = <&ths 0>;
+
+			cooling-maps {
+				map0 {
+					trip = <&cpu_alert0>;
+					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>;
+				};
+				map1 {
+					trip = <&cpu_alert1>;
+					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>;
+				};
+			};
+
+			trips {
+				cpu_alert0: cpu_alert0 {
+					/* milliCelsius */
+					temperature = <75000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				cpu_alert1: cpu_alert1 {
+					/* milliCelsius */
+					temperature = <90000>;
+					hysteresis = <2000>;
+					type = "hot";
+				};
+
+				cpu_crit: cpu_crit {
+					/* milliCelsius */
+					temperature = <110000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
 		};
 
 		gpu0_thermal: gpu0-thermal {