xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/watchdog/cdns,wdt-r1p2.yaml

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/watchdog/cdns,wdt-r1p2.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Cadence watchdog timer controller

maintainers:
  - Neeli Srinivas <srinivas.neeli@amd.com>

description:
  The cadence watchdog timer is used to detect and recover from
  system malfunctions. This watchdog contains 24 bit counter and
  a programmable reset period. The timeout period varies from 1 ms
  to 30 seconds while using a 100Mhz clock.

allOf:
  - $ref: watchdog.yaml#

properties:
  compatible:
    enum:
      - cdns,wdt-r1p2

  reg:
    maxItems: 1

  clocks:
    maxItems: 1

  interrupts:
    maxItems: 1

  reset-on-timeout:
    type: boolean
    description: |
      If this property exists, then a reset is done when watchdog
      times out.

required:
  - compatible
  - reg
  - clocks
  - interrupts

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    watchdog@f8005000 {
        compatible = "cdns,wdt-r1p2";
        reg = <0xf8005000 0x1000>;
        clocks = <&clkc 45>;
        interrupt-parent = <&intc>;
        interrupts = <GIC_SPI 9 IRQ_TYPE_EDGE_RISING>;
        reset-on-timeout;
        timeout-sec = <10>;
    };
...