| Message ID | 1490990586-30898-3-git-send-email-stefan.wahren@i2se.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
On Fri, Mar 31, 2017 at 08:03:04PM +0000, Stefan Wahren wrote: > 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> Acked-by: Eduardo Valentin <edubezval@gmail.com>
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi index 0890d97..659b6e9 100644 --- a/arch/arm/boot/dts/bcm2835.dtsi +++ b/arch/arm/boot/dts/bcm2835.dtsi @@ -24,6 +24,10 @@ }; }; +&cpu_thermal { + coefficients = <(-538) 407000>; +}; + /* enable thermal sensor with the correct compatible property set */ &thermal { compatible = "brcm,bcm2835-thermal"; diff --git a/arch/arm/boot/dts/bcm2836.dtsi b/arch/arm/boot/dts/bcm2836.dtsi index 519a44f..da3deeb 100644 --- a/arch/arm/boot/dts/bcm2836.dtsi +++ b/arch/arm/boot/dts/bcm2836.dtsi @@ -77,6 +77,10 @@ interrupts = <8>; }; +&cpu_thermal { + coefficients = <(-538) 407000>; +}; + /* enable thermal sensor with the correct compatible property set */ &thermal { compatible = "brcm,bcm2836-thermal"; diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi index a3106aa..9bc0a1c9 100644 --- a/arch/arm/boot/dts/bcm283x.dtsi +++ b/arch/arm/boot/dts/bcm283x.dtsi @@ -19,6 +19,26 @@ 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>; @@ -394,6 +414,7 @@ compatible = "brcm,bcm2835-thermal"; reg = <0x7e212000 0x8>; clocks = <&clocks BCM2835_CLOCK_TSENS>; + #thermal-sensor-cells = <0>; status = "disabled"; };
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> --- arch/arm/boot/dts/bcm2835.dtsi | 4 ++++ arch/arm/boot/dts/bcm2836.dtsi | 4 ++++ arch/arm/boot/dts/bcm283x.dtsi | 21 +++++++++++++++++++++ 3 files changed, 29 insertions(+)