The thermal zone uses spmi-temp-alarm as sensor. If the sensor is configured without an IIO input it always reports 37°C for temperatures below the first hardware trip point at 105°C. This hardware trip point is configured as critical trip point, to initiate a system shutdown before the temperature reaches the next hardware trip point at 125°C, where the PMIC performs a partial shutdown. The temperature of the critical trip point can be raised after adding the die temperature ADC as IIO input for spmi-temp-alarm, which significantly increases the precision of the temperature measurements. Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx> --- Changes in v2: - defined 'thermal-zones' node in pm8998.dtsi instead of using a label to refer to it - use 105°C hardware trip point as critical trip point - reduced number of trip points to 2 - lowered temperature of passive trip point - updated trip point names and added labels - updated commit message arch/arm64/boot/dts/qcom/pm8998.dtsi | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/pm8998.dtsi b/arch/arm64/boot/dts/qcom/pm8998.dtsi index 2f4989e7ef68..e7caa334e6c7 100644 --- a/arch/arm64/boot/dts/qcom/pm8998.dtsi +++ b/arch/arm64/boot/dts/qcom/pm8998.dtsi @@ -3,6 +3,7 @@ #include <dt-bindings/spmi/spmi.h> #include <dt-bindings/interrupt-controller/irq.h> +#include <dt-bindings/thermal/thermal.h> &spmi_bus { pm8998_lsid0: pmic@0 { @@ -60,3 +61,27 @@ #size-cells = <0>; }; }; + +/ { + thermal-zones { + pm8998 { + polling-delay-passive = <250>; + polling-delay = <1000>; + + thermal-sensors = <&pm8998_temp>; + + trips { + pm8998_alert0: pm8998-alert0 { + temperature = <95000>; + hysteresis = <2000>; + type = "passive"; + }; + pm8998_crit: pm8998-crit { + temperature = <105000>; + hysteresis = <2000>; + type = "critical"; + }; + }; + }; + }; +}; -- 2.18.0.399.gad0ab374a1-goog -- To unsubscribe from this list: send the line "unsubscribe linux-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html