xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/timer/renesas,tmu.yaml (revision 62306a36)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/timer/renesas,tmu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Renesas R-Mobile/R-Car Timer Unit (TMU)

maintainers:
  - Geert Uytterhoeven <geert+renesas@glider.be>
  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

description:
  The TMU is a 32-bit timer/counter with configurable clock inputs and
  programmable compare match.

  Channels share hardware resources but their counter and compare match value
  are independent. The TMU hardware supports up to three channels.

properties:
  compatible:
    items:
      - enum:
          - renesas,tmu-r8a7740  # R-Mobile A1
          - renesas,tmu-r8a774a1 # RZ/G2M
          - renesas,tmu-r8a774b1 # RZ/G2N
          - renesas,tmu-r8a774c0 # RZ/G2E
          - renesas,tmu-r8a774e1 # RZ/G2H
          - renesas,tmu-r8a7778  # R-Car M1A
          - renesas,tmu-r8a7779  # R-Car H1
          - renesas,tmu-r8a7795  # R-Car H3
          - renesas,tmu-r8a7796  # R-Car M3-W
          - renesas,tmu-r8a77961 # R-Car M3-W+
          - renesas,tmu-r8a77965 # R-Car M3-N
          - renesas,tmu-r8a77970 # R-Car V3M
          - renesas,tmu-r8a77980 # R-Car V3H
          - renesas,tmu-r8a77990 # R-Car E3
          - renesas,tmu-r8a77995 # R-Car D3
          - renesas,tmu-r8a779a0 # R-Car V3U
          - renesas,tmu-r8a779f0 # R-Car S4-8
          - renesas,tmu-r8a779g0 # R-Car V4H
      - const: renesas,tmu

  reg:
    maxItems: 1

  interrupts:
    minItems: 2
    maxItems: 3

  clocks:
    maxItems: 1

  clock-names:
    const: fck

  power-domains:
    maxItems: 1

  resets:
    maxItems: 1

  '#renesas,channels':
    description:
      Number of channels implemented by the timer.
    $ref: /schemas/types.yaml#/definitions/uint32
    enum: [ 2, 3 ]
    default: 3

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names
  - power-domains

if:
  not:
    properties:
      compatible:
        contains:
          enum:
            - renesas,tmu-r8a7740
            - renesas,tmu-r8a7778
            - renesas,tmu-r8a7779
then:
  required:
    - resets

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/r8a7779-clock.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/power/r8a7779-sysc.h>
    tmu0: timer@ffd80000 {
            compatible = "renesas,tmu-r8a7779", "renesas,tmu";
            reg = <0xffd80000 0x30>;
            interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>,
                         <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
                         <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
            clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
            clock-names = "fck";
            power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
            #renesas,channels = <3>;
    };