Kernel-4.18.0-80.el8_uniphier-thermal

• 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
  • “socionext,uniphier-pxs3-thermal” : For UniPhier PXs3 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)>;
            };
        };
    };
};