linux/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/watchdog/starfive,jh7100-wdt.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: StarFive Watchdog for JH7100 and JH7110 SoC

maintainers:
  - Xingyu Wu <xingyu.wu@starfivetech.com>
  - Samin Guo <samin.guo@starfivetech.com>

description:
  The JH7100 and JH7110 watchdog both are 32 bit counters. JH7100 watchdog
  has only one timeout phase and reboots. And JH7110 watchdog has two
  timeout phases. At the first phase, the signal of watchdog interrupt
  output(WDOGINT) will rise when counter is 0. The counter will reload
  the timeout value. And then, if counter decreases to 0 again and WDOGINT
  isn't cleared, the watchdog will reset the system unless the watchdog
  reset is disabled.

properties:
  compatible:
    oneOf:
      - enum:
          - starfive,jh7100-wdt
          - starfive,jh7110-wdt
      - items:
          - enum:
              - starfive,jh8100-wdt
          - const: starfive,jh7110-wdt

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    items:
      - description: APB clock
      - description: Core clock

  clock-names:
    items:
      - const: apb
      - const: core

  resets:
    minItems: 1
    maxItems: 2

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - resets

allOf:
  - $ref: watchdog.yaml#

  - if:
      properties:
        compatible:
          contains:
            enum:
              - starfive,jh8100-wdt
    then:
      properties:
        resets:
          items:
            - description: Core reset
    else:
      properties:
        resets:
          items:
            - description: APB reset
            - description: Core reset

unevaluatedProperties: false

examples:
  - |
    watchdog@12480000 {
        compatible = "starfive,jh7100-wdt";
        reg = <0x12480000 0x10000>;
        clocks = <&clk 171>,
                 <&clk 172>;
        clock-names = "apb", "core";
        resets = <&rst 99>,
                 <&rst 100>;
    };