Bindings/thermal/max77620_thermal.txt

   1 Thermal driver for MAX77620 Power management IC from Maxim Semiconductor.
   2
   3 Maxim Semiconductor MAX77620 supports alarm interrupts when its
   4 die temperature crosses 120C and 140C. These threshold temperatures
   5 are not configurable. Device does not provide the real temperature
   6 of die other than just indicating whether temperature is above or
   7 below threshold level.
   8
   9 Required properties:
  10 -------------------
  11 #thermal-sensor-cells:  For more details, please refer to
  12                         <devicetree/bindings/thermal/thermal-sensor.yaml>
  13                         The value must be 0.
  14
  15 For more details, please refer generic thermal DT binding document
  16 <devicetree/bindings/thermal/thermal*.yaml>.
  17
  18 Please refer <devicetree/bindings/mfd/max77620.txt> for mfd DT binding
  19 document for the MAX77620.
  20
  21 Example:
  22 --------
  23 #include <dt-bindings/mfd/max77620.h>
  24 #include <dt-bindings/thermal/thermal.h>
  25 ...
  26
  27 i2c@7000d000 {
  28         spmic: max77620@3c {
  29                 compatible = "maxim,max77620";
  30                 :::::
  31                 #thermal-sensor-cells = <0>;
  32                 :::
  33         };
  34 };
  35
  36 cool_dev: cool-dev {
  37         compatible = "cooling-dev";
  38         #cooling-cells = <2>;
  39 };
  40
  41 thermal-zones {
  42         PMIC-Die {
  43                 polling-delay = <0>;
  44                 polling-delay-passive = <0>;
  45                 thermal-sensors = <&spmic>;
  46
  47                 trips {
  48                         pmic_die_warn_temp_thresh: hot-die {
  49                                 temperature = <120000>;
  50                                 type = "hot";
  51                                 hysteresis = <0>;
  52                         };
  53
  54                         pmic_die_cirt_temp_thresh: cirtical-die {
  55                                 temperature = <140000>;
  56                                 type = "critical";
  57                                 hysteresis = <0>;
  58                         };
  59                 };
  60
  61                 cooling-maps {
  62                         map0 {
  63                                 trip = <&pmic_die_warn_temp_thresh>;
  64                                 cooling-device = <&cool_dev THERMAL_NO_LIMIT
  65                                                   THERMAL_NO_LIMIT>;
  66                                 contribution = <100>;
  67                         };
  68                 };
  69         };
  70 };