Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt

   1 * DT bindings for Renesas R-Car Gen3 Thermal Sensor driver
   2
   3 On R-Car Gen3 SoCs, the thermal sensor controllers (TSC) control the thermal
   4 sensors (THS) which are the analog circuits for measuring temperature (Tj)
   5 inside the LSI.
   6
   7 Required properties:
   8 - compatible            : "renesas,<soctype>-thermal",
   9                           Examples with soctypes are:
  10                             - "renesas,r8a7795-thermal" (R-Car H3)
  11                             - "renesas,r8a7796-thermal" (R-Car M3-W)
  12 - reg                   : Address ranges of the thermal registers. Each sensor
  13                           needs one address range. Sorting must be done in
  14                           increasing order according to datasheet, i.e.
  15                           TSC1, TSC2, ...
  16 - clocks                : Must contain a reference to the functional clock.
  17 - #thermal-sensor-cells : must be <1>.
  18
  19 Optional properties:
  20
  21 - interrupts           : interrupts routed to the TSC (3 for H3 and M3-W)
  22 - power-domain          : Must contain a reference to the power domain. This
  23                           property is mandatory if the thermal sensor instance
  24                           is part of a controllable power domain.
  25
  26 Example:
  27
  28         tsc: thermal@e6198000 {
  29                 compatible = "renesas,r8a7795-thermal";
  30                 reg = <0 0xe6198000 0 0x68>,
  31                       <0 0xe61a0000 0 0x5c>,
  32                       <0 0xe61a8000 0 0x5c>;
  33                 interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
  34                              <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
  35                              <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
  36                 clocks = <&cpg CPG_MOD 522>;
  37                 power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
  38                 #thermal-sensor-cells = <1>;
  39                 status = "okay";
  40         };
  41
  42         thermal-zones {
  43                 sensor_thermal1: sensor-thermal1 {
  44                         polling-delay-passive = <250>;
  45                         polling-delay = <1000>;
  46                         thermal-sensors = <&tsc 0>;
  47
  48                         trips {
  49                                 sensor1_crit: sensor1-crit {
  50                                         temperature = <90000>;
  51                                         hysteresis = <2000>;
  52                                         type = "critical";
  53                                 };
  54                         };
  55                 };
  56         };