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@xxxxxxxxxxxxxxxxxx> --- arch/arm/boot/dts/sun8i-a33.dtsi | 47 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/arch/arm/boot/dts/sun8i-a33.dtsi b/arch/arm/boot/dts/sun8i-a33.dtsi index 1fcae81..735ebea 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 { @@ -79,6 +80,9 @@ clocks = <&ccu CLK_CPUX>; clock-names = "cpu"; operating-points-v2 = <&cpu0_opp_table>; + cooling-min-level = <0>; + cooling-max-level = <3>; + #cooling-cells = <2>; }; cpu@2 { @@ -100,6 +104,49 @@ status = "disabled"; }; + thermal-zones { + cpu_thermal { + /* milliseconds */ + polling-delay-passive = <250>; + polling-delay = <1000>; + thermal-sensors = <&rtp>; + + 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"; + }; + }; + }; + }; + memory { reg = <0x40000000 0x80000000>; }; -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html