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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>
This commit is contained in:
Quentin Schulz 2017-04-05 11:06:32 +02:00 committed by Maxime Ripard
parent a424f635a7
commit a5ce7a3d44
1 changed files with 45 additions and 0 deletions
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45
arch/arm/boot/dts/sun8i-a33.dtsi
View File

@ -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 {