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authorQuentin Schulz <quentin.schulz@free-electrons.com>2017-04-05 12:06:32 +0300
committerMaxime Ripard <maxime.ripard@free-electrons.com>2017-04-05 15:07:52 +0300
commita5ce7a3d44a2e0d88dfe2b870331ec7c5c2d3080 (patch)
tree42c2e03797e954d92f12fa8d62b4cb51119662d0 /arch/arm/boot/dts/sun8i-a33.dtsi
parenta424f635a7a521102f8427a3fc2e6d251f388557 (diff)
downloadlinux-a5ce7a3d44a2e0d88dfe2b870331ec7c5c2d3080.tar.xz
ARM: sun8i: a33: add CPU thermal throttling
This adds CPU thermal throttling for the Allwinner A33. It uses the thermal sensor present in the SoC's GPADC. Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Diffstat (limited to 'arch/arm/boot/dts/sun8i-a33.dtsi')
-rw-r--r--arch/arm/boot/dts/sun8i-a33.dtsi45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/sun8i-a33.dtsi b/arch/arm/boot/dts/sun8i-a33.dtsi
index 0ee3e18659cf..2bf36d86a00f 100644
--- a/arch/arm/boot/dts/sun8i-a33.dtsi
+++ b/arch/arm/boot/dts/sun8i-a33.dtsi
@@ -43,6 +43,7 @@
*/
#include "sun8i-a23-a33.dtsi"
+#include <dt-bindings/thermal/thermal.h>
/ {
cpu0_opp_table: opp_table0 {
@@ -133,6 +134,7 @@
clocks = <&ccu CLK_CPUX>;
clock-names = "cpu";
operating-points-v2 = <&cpu0_opp_table>;
+ #cooling-cells = <2>;
};
cpu@2 {
@@ -388,6 +390,49 @@
};
};
};
+
+ thermal-zones {
+ cpu_thermal {
+ /* milliseconds */
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+ thermal-sensors = <&ths>;
+
+ cooling-maps {
+ map0 {
+ trip = <&cpu_alert0>;
+ cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+ };
+ map1 {
+ trip = <&cpu_alert1>;
+ cooling-device = <&cpu0 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";
+ };
+ };
+ };
+ };
};
&ccu {