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 - #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
  16 - rockchip,hw-tshut-temp : The hardware-controlled shutdown temperature value.
  17 - rockchip,hw-tshut-mode : The hardware-controlled shutdown mode 0:CRU 1:GPIO.
  18 - rockchip,hw-tshut-polarity : The hardware-controlled active polarity 0:LOW
  19                                1:HIGH.
  20
  21 Exiample:
  22 tsadc: tsadc@ff280000 {
  23         compatible = "rockchip,rk3288-tsadc";
  24         reg = <0xff280000 0x100>;
  25         interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
  26         clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
  27         clock-names = "tsadc", "apb_pclk";
  28         resets = <&cru SRST_TSADC>;
  29         reset-names = "tsadc-apb";
  30         pinctrl-names = "default";
  31         pinctrl-0 = <&otp_out>;
  32         #thermal-sensor-cells = <1>;
  33         rockchip,hw-tshut-temp = <95000>;
  34         rockchip,hw-tshut-mode = <0>;
  35         rockchip,hw-tshut-polarity = <0>;
  36 };
  37
  38 Example: referring to thermal sensors:
  39 thermal-zones {
  40         cpu_thermal: cpu_thermal {
  41                 polling-delay-passive = <1000>; /* milliseconds */
  42                 polling-delay = <5000>; /* milliseconds */
  43
  44                 /* sensor       ID */
  45                 thermal-sensors = <&tsadc       1>;
  46
  47                 trips {
  48                         cpu_alert0: cpu_alert {
  49                                 temperature = <70000>; /* millicelsius */
  50                                 hysteresis = <2000>; /* millicelsius */
  51                                 type = "passive";
  52                         };
  53                         cpu_crit: cpu_crit {
  54                                 temperature = <90000>; /* millicelsius */
  55                                 hysteresis = <2000>; /* millicelsius */
  56                                 type = "critical";
  57                         };
  58                 };
  59
  60                 cooling-maps {
  61                         map0 {
  62                                 trip = <&cpu_alert0>;
  63                                 cooling-device =
  64                                     <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
  65                         };
  66                 };
  67         };
  68 };