dts/bindings/watchdog/nxp,s32-swt.yaml

# Copyright 2022-2024 NXP
# SPDX-License-Identifier: Apache-2.0

description: Software Watchdog Timer (SWT)

compatible: "nxp,s32-swt"

include: base.yaml

properties:
  reg:
    required: true

  interrupts:
    required: true

  clocks:
    required: true

  master-access-mask:
    type: int
    default: 0xff
    description: |
      Each bit set on this mask enables access to this watchdog for the platform
      bus master corresponding to the bit. The platform bus master assignments
      are chip-specific.
      Defaults to access enabled for all masters (hardware reset value).

  reset-on-invalid-access:
    type: boolean
    description: |
      Set this flag to generate a reset on respond to an invalid access.

  service-mode:
    type: string
    default: "fixed"
    enum:
      - "fixed"
      - "keyed"
    description: |
      Watchdog service mode:
        - fixed: writes a fixed sequence as defined by hardware.
        - keyed: writes two pseudo-random key values based on an initial key.
      Defaults to "fixed" (hardware reset value).

  initial-key:
    type: int
    default: 0
    description: |
      Overrides the initial key when using keyed service mode.
      Defaults to 0 (hardware reset value).

  lock-mode:
    type: string
    default: "unlocked"
    enum:
      - "unlocked"
      - "soft-lock"
      - "hard-lock"
    description: |
      Lock mechanism that provides write access protection to the configuration
      and service registers:
        - unlocked: registers are always writable.
        - soft: unlocked by writing an unlock sequence to the service register.
        - hard: unlocked only after a reset.
      Defaults to unlocked (hardware reset value).