Documentation/devicetree/bindings/mfd/brcm,twd.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/mfd/brcm,twd.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/mfd/brcm,twd.yaml
Extension
.yaml
Size
1500 bytes
Lines
70
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.

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Annotated Snippet

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/brcm,twd.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Broadcom's Timer-Watchdog (aka TWD)

maintainers:
  - Rafał Miłecki <rafal@milecki.pl>

description: |
  Broadcom has a Timer-Watchdog block used in multiple SoCs (e.g., BCM4908,
  BCM63xx, BCM7038). There are few variants available (they differ slightly in
  registers layout). This block consists of: timers, watchdog and optionally a
  software reset handler.

properties:
  compatible:
    items:
      - enum:
          - brcm,bcm4908-twd
          - brcm,bcm7038-twd
      - const: simple-mfd
      - const: syscon

  reg:
    maxItems: 1

  ranges: true

  "#address-cells":
    const: 1

  "#size-cells":
    const: 1

patternProperties:
  '^timer@[a-f0-9]+$':
    $ref: /schemas/timer/brcm,bcmbca-timer.yaml

  '^watchdog@[a-f0-9]+$':
    $ref: /schemas/watchdog/brcm,bcm7038-wdt.yaml

additionalProperties: false

required:
  - reg

examples:
  - |
    timer-mfd@ff800400 {
        compatible = "brcm,bcm4908-twd", "simple-mfd", "syscon";
        reg = <0xff800400 0x4c>;
        ranges = <0x00000000 0xff800400 0x4c>;

        #address-cells = <1>;
        #size-cells = <1>;

        timer@0 {
            compatible = "brcm,bcm63138-timer";
            reg = <0x0 0x28>;
        };

        watchdog@28 {
            compatible = "brcm,bcm7038-wdt";
            reg = <0x28 0x8>;
        };
    };

Annotation

Implementation Notes