diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2020-12-12 11:46:26 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2021-01-13 13:12:20 +0100 |
| commit | 695055861a361bc6ec14b584f44a3c0c453633a5 (patch) | |
| tree | 5a3187a637c603538b3cc71ea80ea68f51fa2376 | |
| parent | bc324d447fba56e9c6a2aef4da24194727ea0f59 (diff) | |
ARM: dts: ux500: Add thermistors to the HREF
This adds the two temperature-monitoring thermistors to the
HREF reference design, defines a thermal zone for the
chassis and sets some reasonable thermal limits.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | arch/arm/boot/dts/ste-hrefv60plus.dtsi | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/ste-hrefv60plus.dtsi b/arch/arm/boot/dts/ste-hrefv60plus.dtsi index 05b4fbbba57f..ee0bf00a94b8 100644 --- a/arch/arm/boot/dts/ste-hrefv60plus.dtsi +++ b/arch/arm/boot/dts/ste-hrefv60plus.dtsi @@ -10,6 +10,64 @@ model = "ST-Ericsson HREF (v60+) platform with Device Tree"; compatible = "st-ericsson,hrefv60+", "st-ericsson,u8500"; + thermal-zones { + chassis-thermal { + /* Poll every 20 seconds */ + polling-delay = <20000>; + /* Poll every 2nd second when cooling */ + polling-delay-passive = <2000>; + + thermal-sensors = <&therm1>, <&therm2>; + + /* Tripping points made from rough guess about operating conditions */ + trips { + chassis_alert: chassis-alert { + /* At 50 degrees take down the CPU frequency */ + temperature = <50000>; + hysteresis = <3000>; + type = "active"; + }; + chassis_crit: chassis-crit { + /* Just shut down at 70 degrees */ + temperature = <70000>; + hysteresis = <2000>; + type = "critical"; + }; + }; + + /* Push down the operating frequency of the SoC when it gets hot */ + cooling-maps { + map0 { + trip = <&chassis_alert>; + cooling-device = <&CPU0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; + contribution = <100>; + }; + }; + }; + }; + + /* + * Thermistors on the board, formally to monitor battery temperatures + * but what they measure is the board temperature. + */ + therm1: thermistor@0 { + compatible = "murata,ncp18wb473"; + io-channels = <&gpadc 0x06>; /* AUX1 */ + pullup-uv = <1800000>; + pullup-ohm = <220000>; + pulldown-ohm = <0>; + #thermal-sensor-cells = <0>; + }; + + therm2: thermistor@1 { + compatible = "murata,ncp18wb473"; + io-channels = <&gpadc 0x07>; /* AUX2 */ + pullup-uv = <1800000>; + pullup-ohm = <220000>; + pulldown-ohm = <0>; + #thermal-sensor-cells = <0>; + }; + soc { /* Name the GPIO muxed rails on the HREF boards */ gpio@8012e000 { |