[PATCH v3 09/11] ARM: dtsi: sun8i: a33: add CPU thermal throttling
From: Quentin Schulz <hidden>
Date: 2017-03-21 17:34:41
Also in:
linux-devicetree, linux-iio, linux-input, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <redacted> --- v3: - switched to new phandle because of modified DT node name for the GPADC (named THS), - got rid of cooling-min-level and cooling-max-level as it's not used in any code in the kernel, v2: - updated cooling-max-level to reflect newly added OPPs, arch/arm/boot/dts/sun8i-a33.dtsi | 45 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+)
diff --git a/arch/arm/boot/dts/sun8i-a33.dtsi b/arch/arm/boot/dts/sun8i-a33.dtsi
index f391f71..73552bb 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 {
@@ -127,6 +128,7 @@ clocks = <&ccu CLK_CPUX>; clock-names = "cpu"; operating-points-v2 = <&cpu0_opp_table>; + #cooling-cells = <2>; }; cpu at 1 {
@@ -170,6 +172,49 @@ }; }; + 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"; + }; + }; + }; + }; + memory { reg = <0x40000000 0x80000000>; };
--
2.9.3