Documentation/devicetree/bindings/watchdog/renesas,rcar-gen3-wwdt.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/watchdog/renesas,rcar-gen3-wwdt.yaml

File Facts

System: Linux kernel
Corpus path: Documentation/devicetree/bindings/watchdog/renesas,rcar-gen3-wwdt.yaml
Extension: .yaml
Size: 2621 bytes
Lines: 115
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: configuration, schema, or hardware description
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

dt-bindings/clock/r8a779g0-cpg-mssr.h
dt-bindings/power/r8a779g0-sysc.h
dt-bindings/interrupt-controller/arm-gic.h

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/watchdog/renesas,rcar-gen3-wwdt.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Renesas Window Watchdog Timer (WWDT) Controller

maintainers:
  - Wolfram Sang <wsa+renesas@sang-engineering.com>

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - renesas,r8a77970-wwdt  # R-Car V3M
              - renesas,r8a77980-wwdt  # R-Car V3H
          - const: renesas,rcar-gen3-wwdt

      - items:
          - enum:
              - renesas,r8a779a0-wwdt  # R-Car V3U
              - renesas,r8a779f0-wwdt  # R-Car S4
              - renesas,r8a779g0-wwdt  # R-Car V4H
              - renesas,r8a779h0-wwdt  # R-Car V4M
          - const: renesas,rcar-gen4-wwdt

  reg:
    maxItems: 1

  interrupts:
    items:
      - description: Pretimeout, 75% of overflow reached
      - description: Error occurred

  interrupt-names:
    items:
      - const: pretimeout
      - const: error

  clocks:
    items:
      - description: Counting clock
      - description: Bus clock

  clock-names:
    items:
      - const: cnt
      - const: bus

  resets:
    minItems: 1
    maxItems: 2

  reset-names:
    minItems: 1
    items:
      - const: cnt
      - const: bus

  power-domains:
    maxItems: 1

required:
  - compatible
  - reg
  - interrupts
  - interrupt-names
  - clocks

Annotation

Immediate include surface: `dt-bindings/clock/r8a779g0-cpg-mssr.h`, `dt-bindings/power/r8a779g0-sysc.h`, `dt-bindings/interrupt-controller/arm-gic.h`.
Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.