Documentation/devicetree/bindings/dma/apple,admac.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/dma/apple,admac.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/dma/apple,admac.yaml
Extension
.yaml
Size
2372 bytes
Lines
97
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.

Dependency Surface

Detected Declarations

Annotated Snippet

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

title: Apple Audio DMA Controller (ADMAC)

description: |
  Apple's Audio DMA Controller (ADMAC) is used to fetch and store audio samples
  on SoCs from the "Apple Silicon" family.

  The controller has been seen with up to 24 channels. Even-numbered channels
  are TX-only, odd-numbered are RX-only. Individual channels are coupled to
  fixed device endpoints.

maintainers:
  - Martin PoviĊĦer <povik+lin@cutebit.org>

allOf:
  - $ref: dma-controller.yaml#

properties:
  compatible:
    oneOf:
      - items:
          - const: apple,t6020-admac
          - const: apple,t8103-admac
      - items:
          - enum:
              # Do not add additional SoC to this list.
              - apple,t6000-admac
              - apple,t8103-admac
              - apple,t8112-admac
          - const: apple,admac

  reg:
    maxItems: 1

  '#dma-cells':
    const: 1
    description:
      Clients specify a single cell with channel number.

  dma-channels:
    maximum: 24

  interrupts:
    minItems: 4
    maxItems: 4
    description:
      Interrupts that correspond to the 4 IRQ outputs of the controller. Usually
      only one of the controller outputs will be connected as an usable interrupt
      source. The remaining interrupts will be left without a valid value, e.g.
      in an interrupts-extended list the disconnected positions will contain
      an empty phandle reference <0>.

  iommus:
    minItems: 1
    maxItems: 2

  power-domains:
    maxItems: 1

  resets:
    maxItems: 1

required:
  - compatible
  - reg

Annotation

Implementation Notes