Documentation/devicetree/bindings/timer/renesas,tmu.txt

   1 * Renesas R-Mobile/R-Car Timer Unit (TMU)
   2
   3 The TMU is a 32-bit timer/counter with configurable clock inputs and
   4 programmable compare match.
   5
   6 Channels share hardware resources but their counter and compare match value
   7 are independent. The TMU hardware supports up to three channels.
   8
   9 Required Properties:
  10
  11   - compatible: must contain one or more of the following:
  12     - "renesas,tmu-r8a7740" for the r8a7740 TMU
  13     - "renesas,tmu-r8a7778" for the r8a7778 TMU
  14     - "renesas,tmu-r8a7779" for the r8a7779 TMU
  15     - "renesas,tmu" for any TMU.
  16       This is a fallback for the above renesas,tmu-* entries
  17
  18   - reg: base address and length of the registers block for the timer module.
  19
  20   - interrupts: interrupt-specifier for the timer, one per channel.
  21
  22   - clocks: a list of phandle + clock-specifier pairs, one for each entry
  23     in clock-names.
  24   - clock-names: must contain "fck" for the functional clock.
  25
  26 Optional Properties:
  27
  28   - #renesas,channels: number of channels implemented by the timer, must be 2
  29     or 3 (if not specified the value defaults to 3).
  30
  31
  32 Example: R8A7779 (R-Car H1) TMU0 node
  33
  34         tmu0: timer@ffd80000 {
  35                 compatible = "renesas,tmu-r8a7779", "renesas,tmu";
  36                 reg = <0xffd80000 0x30>;
  37                 interrupts = <0 32 IRQ_TYPE_LEVEL_HIGH>,
  38                              <0 33 IRQ_TYPE_LEVEL_HIGH>,
  39                              <0 34 IRQ_TYPE_LEVEL_HIGH>;
  40                 clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
  41                 clock-names = "fck";
  42
  43                 #renesas,channels = <3>;
  44         };