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ARM: dts: bcm283x: Add CPU thermal zone with 1 trip point

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As suggested by Eduardo Valentin this adds the thermal zone for
the bcm2835 SoC with its single thermal sensor. We start with
the criticial trip point and leave the cooling devices empty
since we don't have any at the moment. Since the coefficients
could vary depending on the SoC we need to define them separate.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Stefan Wahren 2017-03-31 20:03:04 +00:00 committed by Eric Anholt
parent 072f58af1d
commit 0fe4d2181c
3 changed files with 29 additions and 0 deletions
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4
arch/arm/boot/dts/bcm2835.dtsi
View File

@ -24,6 +24,10 @@ arm-pmu {
};
};
&cpu_thermal {
coefficients = <(-538) 407000>;
};
/* enable thermal sensor with the correct compatible property set */
&thermal {
compatible = "brcm,bcm2835-thermal";

4
arch/arm/boot/dts/bcm2836.dtsi
View File

@ -77,6 +77,10 @@ &intc {
interrupts = <8>;
};
&cpu_thermal {
coefficients = <(-538) 407000>;
};
/* enable thermal sensor with the correct compatible property set */
&thermal {
compatible = "brcm,bcm2836-thermal";

21
arch/arm/boot/dts/bcm283x.dtsi
View File

@ -19,6 +19,26 @@ chosen {
bootargs = "earlyprintk console=ttyAMA0";
};
thermal-zones {
cpu_thermal: cpu-thermal {
polling-delay-passive = <0>;
polling-delay = <1000>;
thermal-sensors = <&thermal>;
trips {
cpu-crit {
temperature = <80000>;
hysteresis = <0>;
type = "critical";
};
};
cooling-maps {
};
};
};
soc {
compatible = "simple-bus";
#address-cells = <1>;
@ -430,6 +450,7 @@ thermal: thermal@7e212000 {
compatible = "brcm,bcm2835-thermal";
reg = <0x7e212000 0x8>;
clocks = <&clocks BCM2835_CLOCK_TSENS>;
#thermal-sensor-cells = <0>;
status = "disabled";
};