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Documentation/devicetree/bindings/thermal/uniphier-thermal.txt
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* UniPhier Thermal bindings | ||
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This describes the devicetree bindings for thermal monitor supported by | ||
PVT(Process, Voltage and Temperature) monitoring unit implemented on Socionext | ||
UniPhier SoCs. | ||
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Required properties: | ||
- compatible : | ||
- "socionext,uniphier-pxs2-thermal" : For UniPhier PXs2 SoC | ||
- "socionext,uniphier-ld20-thermal" : For UniPhier LD20 SoC | ||
- interrupts : IRQ for the temperature alarm | ||
- #thermal-sensor-cells : Should be 0. See ./thermal.txt for details. | ||
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Optional properties: | ||
- socionext,tmod-calibration: A pair of calibrated values referred from PVT, | ||
in case that the values aren't set on SoC, | ||
like a reference board. | ||
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Example: | ||
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sysctrl@61840000 { | ||
compatible = "socionext,uniphier-ld20-sysctrl", | ||
"simple-mfd", "syscon"; | ||
reg = <0x61840000 0x10000>; | ||
... | ||
pvtctl: pvtctl { | ||
compatible = "socionext,uniphier-ld20-thermal"; | ||
interrupts = <0 3 1>; | ||
#thermal-sensor-cells = <0>; | ||
}; | ||
... | ||
}; | ||
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thermal-zones { | ||
cpu_thermal { | ||
polling-delay-passive = <250>; /* 250ms */ | ||
polling-delay = <1000>; /* 1000ms */ | ||
thermal-sensors = <&pvtctl>; | ||
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trips { | ||
cpu_crit: cpu_crit { | ||
temperature = <110000>; /* 110C */ | ||
hysteresis = <2000>; | ||
type = "critical"; | ||
}; | ||
cpu_alert: cpu_alert { | ||
temperature = <100000>; /* 100C */ | ||
hysteresis = <2000>; | ||
type = "passive"; | ||
}; | ||
}; | ||
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cooling-maps { | ||
map0 { | ||
trip = <&cpu_alert>; | ||
cooling-device = <&cpu0 (-1) (-1)>; | ||
}; | ||
map1 { | ||
trip = <&cpu_alert>; | ||
cooling-device = <&cpu2 (-1) (-1)>; | ||
}; | ||
}; | ||
}; | ||
}; |
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