Documentation/devicetree/bindings/arm/sp810.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/arm/sp810.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/arm/sp810.yaml
Extension
.yaml
Size
1825 bytes
Lines
81
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/arm/sp810.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ARM Versatile Express SP810 System Controller

maintainers:
  - Andre Przywara <andre.przywara@arm.com>

description:
  The Arm SP810 system controller provides clocks, timers and a watchdog.

# We need a select here so we don't match all nodes with 'arm,primecell'
select:
  properties:
    compatible:
      contains:
        const: arm,sp810
  required:
    - compatible

properties:
  compatible:
    items:
      - const: arm,sp810
      - const: arm,primecell

  reg:
    maxItems: 1

  clock-names:
    items:
      - const: refclk
      - const: timclk
      - const: apb_pclk

  clocks:
    items:
      - description: reference clock
      - description: timer clock
      - description: APB register access clock

  "#clock-cells":
    const: 1

  clock-output-names:
    maxItems: 4

  assigned-clocks:
    maxItems: 4

  assigned-clock-parents:
    maxItems: 4

additionalProperties: false

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - "#clock-cells"

examples:
  - |
    sysctl@20000 {
        compatible = "arm,sp810", "arm,primecell";
        reg = <0x020000 0x1000>;

Annotation

Implementation Notes