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* UniPhier Thermal bindings
This describes the devicetree bindings for thermal monitor supported by
PVT(Process, Voltage and Temperature) monitoring unit implemented on Socionext
UniPhier SoCs.
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.
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.
Example:
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>;
};
...
};
thermal-zones {
cpu_thermal {
polling-delay-passive = <250>; /* 250ms */
polling-delay = <1000>; /* 1000ms */
thermal-sensors = <&pvtctl>;
trips {
cpu_crit: cpu_crit {
temperature = <110000>; /* 110C */
hysteresis = <2000>;
type = "critical";
};
cpu_alert: cpu_alert {
temperature = <100000>; /* 100C */
hysteresis = <2000>;
type = "passive";
};
};
cooling-maps {
map0 {
trip = <&cpu_alert>;
cooling-device = <&cpu0 (-1) (-1)>;
};
map1 {
trip = <&cpu_alert>;
cooling-device = <&cpu2 (-1) (-1)>;
};
};
};
};
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