xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/watchdog/arm,sbsa-gwdt.yaml

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

title: SBSA (Server Base System Architecture) Generic Watchdog

maintainers:
  - Fu Wei <fu.wei@linaro.org>

description: |
  The SBSA Generic Watchdog Timer is used to force a reset of the system after
  two stages of timeout have elapsed. A detailed definition of the watchdog
  timer can be found in the ARM document: ARM-DEN-0029 - Server Base System
  Architecture (SBSA)

allOf:
  - $ref: watchdog.yaml#

properties:
  compatible:
    const: arm,sbsa-gwdt

  reg:
    items:
      - description: Watchdog control frame
      - description: Refresh frame

  interrupts:
    description: The Watchdog Signal 0 (WS0) SPI (Shared Peripheral Interrupt)
    maxItems: 1

required:
  - compatible
  - reg
  - interrupts

unevaluatedProperties: false

examples:
  - |
    watchdog@2a440000 {
        compatible = "arm,sbsa-gwdt";
        reg = <0x2a440000 0x1000>,
              <0x2a450000 0x1000>;
        interrupts = <0 27 4>;
        timeout-sec = <30>;
    };
...