Documentation/devicetree/bindings/power/renesas,apmu.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/power/renesas,apmu.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/power/renesas,apmu.yaml
Extension
.yaml
Size
1575 bytes
Lines
58
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/power/renesas,apmu.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Renesas Advanced Power Management Unit

maintainers:
  - Geert Uytterhoeven <geert+renesas@glider.be>
  - Magnus Damm <magnus.damm@gmail.com>

description:
  Renesas R-Car Gen2 and RZ/G1 SoCs utilize one or more APMU hardware units for
  CPU core power domain control including SMP boot and CPU Hotplug.

properties:
  compatible:
    items:
      - enum:
          - renesas,r8a7742-apmu  # RZ/G1H
          - renesas,r8a7743-apmu  # RZ/G1M
          - renesas,r8a7744-apmu  # RZ/G1N
          - renesas,r8a7745-apmu  # RZ/G1E
          - renesas,r8a77470-apmu # RZ/G1C
          - renesas,r8a7790-apmu  # R-Car H2
          - renesas,r8a7791-apmu  # R-Car M2-W
          - renesas,r8a7792-apmu  # R-Car V2H
          - renesas,r8a7793-apmu  # R-Car M2-N
          - renesas,r8a7794-apmu  # R-Car E2
      - const: renesas,apmu

  reg:
    maxItems: 1

  cpus:
    minItems: 1
    maxItems: 4
    description: |
      Array of phandles pointing to CPU cores, which should match the order of
      CPU cores used by the WUPCR and PSTR registers in the Advanced Power
      Management Unit section of the device's datasheet.

required:
  - compatible
  - reg
  - cpus

additionalProperties: false

examples:
  - |
    apmu@e6152000 {
            compatible = "renesas,r8a7791-apmu", "renesas,apmu";
            reg = <0xe6152000 0x188>;
            cpus = <&cpu0>, <&cpu1>;
    };

Annotation

Implementation Notes