xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/timer/ti,timer-dm.yaml

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

title: TI dual-mode timer

maintainers:
  - Tony Lindgren <tony@atomide.com>

description: |
  The TI dual-mode timer is a general purpose timer with PWM capabilities.

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - ti,am335x-timer
              - ti,am335x-timer-1ms
              - ti,am654-timer
              - ti,dm814-timer
              - ti,dm816-timer
              - ti,omap2420-timer
              - ti,omap3430-timer
              - ti,omap4430-timer
              - ti,omap5430-timer
      - items:
          - const: ti,am4372-timer
          - const: ti,am335x-timer
      - items:
          - const: ti,am4372-timer-1ms
          - const: ti,am335x-timer-1ms

  reg:
    items:
      - description: IO address
      - description: L3 to L4 mapping for omap4/5 L4 ABE
    minItems: 1

  clocks:
    items:
      - description: Functional clock
      - description: System clock for omap4/5 and dra7
    minItems: 1

  clock-names:
    items:
      - const: fck
      - const: timer_sys_ck
    minItems: 1

  power-domains:
    description:
      Power domain if available
    maxItems: 1

  interrupts:
    description:
      Interrupt if available. The timer PWM features may be usable
      in a limited way even without interrupts.
    maxItems: 1

  ti,timer-alwon:
    description:
      Timer is always enabled when the SoC is powered. Note that some SoCs like
      am335x can suspend to PM coprocessor RTC only mode and in that case the
      SoC power is cut including timers.
    type: boolean

  ti,timer-dsp:
    description:
      Timer is routable to the DSP in addition to the operating system.
    type: boolean

  ti,timer-pwm:
    description:
      Timer has been wired for PWM capability.
    type: boolean

  ti,timer-secure:
    description:
      Timer access has been limited to secure mode only.
    type: boolean

  ti,hwmods:
    description:
      Name of the HWMOD associated with timer. This is for legacy
      omap2/3 platforms only.
    $ref: /schemas/types.yaml#/definitions/string
    deprecated: true

required:
  - compatible
  - reg

additionalProperties: false

allOf:
  - if:
      properties:
        compatible:
          contains:
            const: ti,am654-timer
    then:
      required:
        - power-domains
    else:
      required:
        - interrupts

  - if:
      not:
        properties:
          compatible:
            contains:
              enum:
                - ti,omap3430-timer
                - ti,omap4430-timer
                - ti,omap5430-timer
    then:
      properties:
        reg:
          maxItems: 1
        clocks:
          maxItems: 1
        clock-names:
          maxItems: 1

  - if:
      properties:
        compatible:
          contains:
            enum:
              - ti,dm814-timer
              - ti,dm816-timer
              - ti,omap2420-timer
              - ti,omap3430-timer
    then:
      properties:
        ti,hwmods:
          items:
            - pattern: "^timer([1-9]|1[0-2])$"
    else:
      properties:
        ti,hwmods: false

examples:
  - |
    timer1: timer@0 {
      compatible = "ti,am335x-timer-1ms";
      reg = <0x0 0x400>;
      interrupts = <67>;
      ti,timer-alwon;
      clocks = <&timer1_fck>;
      clock-names = "fck";
    };
...