rockchip-thermal.txt

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    1 * Temperature Sensor ADC (TSADC) on rockchip SoCs
    2 
    3 Required properties:
    4 - compatible : should be "rockchip,<name>-tsadc"
    5    "rockchip,px30-tsadc":   found on PX30 SoCs
    6    "rockchip,rv1108-tsadc": found on RV1108 SoCs
    7    "rockchip,rk3228-tsadc": found on RK3228 SoCs
    8    "rockchip,rk3288-tsadc": found on RK3288 SoCs
    9    "rockchip,rk3328-tsadc": found on RK3328 SoCs
   10    "rockchip,rk3368-tsadc": found on RK3368 SoCs
   11    "rockchip,rk3399-tsadc": found on RK3399 SoCs
   12 - reg : physical base address of the controller and length of memory mapped
   13         region.
   14 - interrupts : The interrupt number to the cpu. The interrupt specifier format
   15                depends on the interrupt controller.
   16 - clocks : Must contain an entry for each entry in clock-names.
   17 - clock-names : Shall be "tsadc" for the converter-clock, and "apb_pclk" for
   18                 the peripheral clock.
   19 - resets : Must contain an entry for each entry in reset-names.
   20            See ../reset/reset.txt for details.
   21 - reset-names : Must include the name "tsadc-apb".
   22 - pinctrl-names : The pin control state names;
   23 - pinctrl-0 : The "init" pinctrl state, it will be set before device probe.
   24 - pinctrl-1 : The "default" pinctrl state, it will be set after reset the
   25               TSADC controller.
   26 - pinctrl-2 : The "sleep" pinctrl state, it will be in for suspend.
   27 - #thermal-sensor-cells : Should be 1. See Documentation/devicetree/bindings/thermal/thermal-sensor.yaml for a description.
   28 
   29 Optional properties:
   30 - rockchip,hw-tshut-temp : The hardware-controlled shutdown temperature value.
   31 - rockchip,hw-tshut-mode : The hardware-controlled shutdown mode 0:CRU 1:GPIO.
   32 - rockchip,hw-tshut-polarity : The hardware-controlled active polarity 0:LOW
   33                                1:HIGH.
   34 - rockchip,grf : The phandle of the syscon node for the general register file.
   35 
   36 Exiample:
   37 tsadc: tsadc@ff280000 {
   38         compatible = "rockchip,rk3288-tsadc";
   39         reg = <0xff280000 0x100>;
   40         interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
   41         clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
   42         clock-names = "tsadc", "apb_pclk";
   43         resets = <&cru SRST_TSADC>;
   44         reset-names = "tsadc-apb";
   45         pinctrl-names = "init", "default", "sleep";
   46         pinctrl-0 = <&otp_gpio>;
   47         pinctrl-1 = <&otp_out>;
   48         pinctrl-2 = <&otp_gpio>;
   49         #thermal-sensor-cells = <1>;
   50         rockchip,hw-tshut-temp = <95000>;
   51         rockchip,hw-tshut-mode = <0>;
   52         rockchip,hw-tshut-polarity = <0>;
   53 };
   54 
   55 Example: referring to thermal sensors:
   56 thermal-zones {
   57         cpu_thermal: cpu_thermal {
   58                 polling-delay-passive = <1000>; /* milliseconds */
   59                 polling-delay = <5000>; /* milliseconds */
   60 
   61                 /* sensor       ID */
   62                 thermal-sensors = <&tsadc       1>;
   63 
   64                 trips {
   65                         cpu_alert0: cpu_alert {
   66                                 temperature = <70000>; /* millicelsius */
   67                                 hysteresis = <2000>; /* millicelsius */
   68                                 type = "passive";
   69                         };
   70                         cpu_crit: cpu_crit {
   71                                 temperature = <90000>; /* millicelsius */
   72                                 hysteresis = <2000>; /* millicelsius */
   73                                 type = "critical";
   74                         };
   75                 };
   76 
   77                 cooling-maps {
   78                         map0 {
   79                                 trip = <&cpu_alert0>;
   80                                 cooling-device =
   81                                     <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
   82                         };
   83                 };
   84         };
   85 };

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