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,r8a774a1-thermal" (RZ/G2M)
  11                             - "renesas,r8a7795-thermal" (R-Car H3)
  12                             - "renesas,r8a7796-thermal" (R-Car M3-W)
  13                             - "renesas,r8a77965-thermal" (R-Car M3-N)
  14                             - "renesas,r8a77980-thermal" (R-Car V3H)
  15 - reg                   : Address ranges of the thermal registers. Each sensor
  16                           needs one address range. Sorting must be done in
  17                           increasing order according to datasheet, i.e.
  18                           TSC1, TSC2, ...
  19 - clocks                : Must contain a reference to the functional clock.
  20 - #thermal-sensor-cells : must be <1>.
  21
  22 Optional properties:
  23
  24 - interrupts            : interrupts routed to the TSC (must be 3).
  25 - power-domain          : Must contain a reference to the power domain. This
  26                           property is mandatory if the thermal sensor instance
  27                           is part of a controllable power domain.
  28
  29 Example:
  30
  31         tsc: thermal@e6198000 {
  32                 compatible = "renesas,r8a7795-thermal";
  33                 reg = <0 0xe6198000 0 0x100>,
  34                       <0 0xe61a0000 0 0x100>,
  35                       <0 0xe61a8000 0 0x100>;
  36                 interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
  37                              <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
  38                              <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
  39                 clocks = <&cpg CPG_MOD 522>;
  40                 power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
  41                 #thermal-sensor-cells = <1>;
  42         };
  43
  44         thermal-zones {
  45                 sensor_thermal1: sensor-thermal1 {
  46                         polling-delay-passive = <250>;
  47                         polling-delay = <1000>;
  48                         thermal-sensors = <&tsc 0>;
  49
  50                         trips {
  51                                 sensor1_crit: sensor1-crit {
  52                                         temperature = <90000>;
  53                                         hysteresis = <2000>;
  54                                         type = "critical";
  55                                 };
  56                         };
  57                 };
  58         };