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