dt-bindings: watchdog: Add watchdog for StarFive JH7100 and JH7110

# 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.

allOf:

  - $ref: watchdog.yaml#

properties:

  compatible:

    enum:

      - starfive,jh7100-wdt

      - 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:

    items:

      - description: APB reset

      - description: Core reset

required:

  - compatible

  - reg

  - clocks

  - clock-names

  - resets

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>;

    };