Documentation/devicetree/bindings/thermal/zx2967-thermal.txt

   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         };