zx2967-thermal.txt

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    1 * ZTE zx2967 family Thermal
    2 
    3 Required Properties:
    4 - compatible: should be one of the following.
    5     * zte,zx296718-thermal
    6 - reg: physical base address of the controller and length of memory mapped
    7     region.
    8 - clocks : Pairs of phandle and specifier referencing the controller's clocks.
    9 - clock-names: "topcrm" for the topcrm clock.
   10                "apb" for the apb clock.
   11 - #thermal-sensor-cells: must be 0.
   12 
   13 Please note: slope coefficient defined in thermal-zones section need to be
   14 multiplied by 1000.
   15 
   16 Example for tempsensor:
   17 
   18         tempsensor: tempsensor@148a000 {
   19                 compatible = "zte,zx296718-thermal";
   20                 reg = <0x0148a000 0x20>;
   21                 clocks = <&topcrm TEMPSENSOR_GATE>, <&audiocrm AUDIO_TS_PCLK>;
   22                 clock-names = "topcrm", "apb";
   23                 #thermal-sensor-cells = <0>;
   24         };
   25 
   26 Example for cooling device:
   27 
   28         cooling_dev: cooling_dev {
   29                 cluster0_cooling_dev: cluster0-cooling-dev {
   30                         #cooling-cells = <2>;
   31                         cpumask = <0xf>;
   32                         capacitance = <1500>;
   33                 };
   34 
   35         cluster1_cooling_dev: cluster1-cooling-dev {
   36                         #cooling-cells = <2>;
   37                         cpumask = <0x30>;
   38                         capacitance = <2000>;
   39                 };
   40         };
   41 
   42 Example for thermal zones:
   43 
   44         thermal-zones {
   45                 zx296718_thermal: zx296718_thermal {
   46                         polling-delay-passive = <500>;
   47                         polling-delay = <1000>;
   48                         sustainable-power = <6500>;
   49 
   50                         thermal-sensors = <&tempsensor 0>;
   51                         /*
   52                          * slope need to be multiplied by 1000.
   53                          */
   54                         coefficients = <1951 (-922)>;
   55 
   56                         trips {
   57                                 trip0: switch_on_temperature {
   58                                         temperature = <90000>;
   59                                         hysteresis = <2000>;
   60                                         type = "passive";
   61                                 };
   62 
   63                                 trip1: desired_temperature {
   64                                         temperature = <100000>;
   65                                         hysteresis = <2000>;
   66                                         type = "passive";
   67                                 };
   68 
   69                                 crit: critical_temperature {
   70                                         temperature = <110000>;
   71                                         hysteresis = <2000>;
   72                                         type = "critical";
   73                                 };
   74                         };
   75 
   76                         cooling-maps {
   77                                 map0 {
   78                                         trip = <&trip0>;
   79                                         cooling-device = <&gpu 2 5>;
   80                                 };
   81 
   82                                 map1 {
   83                                         trip = <&trip0>;
   84                                         cooling-device = <&cluster0_cooling_dev 1 2>;
   85                                 };
   86 
   87                                 map2 {
   88                                         trip = <&trip1>;
   89                                         cooling-device = <&cluster0_cooling_dev 1 2>;
   90                                 };
   91 
   92                                 map3 {
   93                                         trip = <&crit>;
   94                                         cooling-device = <&cluster0_cooling_dev 1 2>;
   95                                 };
   96 
   97                                 map4 {
   98                                         trip = <&trip0>;
   99                                         cooling-device = <&cluster1_cooling_dev 1 2>;
  100                                         contribution = <9000>;
  101                                 };
  102 
  103                                 map5 {
  104                                         trip = <&trip1>;
  105                                         cooling-device = <&cluster1_cooling_dev 1 2>;
  106                                         contribution = <4096>;
  107                                 };
  108 
  109                                 map6 {
  110                                         trip = <&crit>;
  111                                         cooling-device = <&cluster1_cooling_dev 1 2>;
  112                                         contribution = <4096>;
  113                                 };
  114                         };
  115                 };
  116         };

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sys/contrib/device-tree/Bindings/thermal/zx2967-thermal.txt