Documentation/devicetree/bindings/thermal/rockchip-thermal.txt

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