Documentation/devicetree/bindings/soundwire/soundwire-controller.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/soundwire/soundwire-controller.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/soundwire/soundwire-controller.yaml
Extension
.yaml
Size
2328 bytes
Lines
87
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/soundwire/soundwire-controller.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: SoundWire Controller Common Properties

maintainers:
  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
  - Vinod Koul <vkoul@kernel.org>

description: |
  SoundWire busses can be described with a node for the SoundWire controller
  device and a set of child nodes for each SoundWire slave on the bus.

properties:
  $nodename:
    pattern: "^soundwire(@.*)?$"

  "#address-cells":
    const: 2

  "#size-cells":
    const: 0

patternProperties:
  "^.*@[0-9a-f],[0-9a-f]$":
    type: object

    properties:
      compatible:
        pattern: "^sdw[0-9a-f]{1}[0-9a-f]{4}[0-9a-f]{4}[0-9a-f]{2}$"
        description: Is the textual representation of SoundWire Enumeration
          address. compatible string should contain SoundWire Version ID,
          Manufacturer ID, Part ID and Class ID in order and shall be in
          lower-case hexadecimal with leading zeroes.
          Valid sizes of these fields are
          Version ID is 1 nibble, number '0x1' represents SoundWire 1.0
          and '0x2' represents SoundWire 1.1 and so on.
          MFD is 4 nibbles
          PID is 4 nibbles
          CID is 2 nibbles
          More Information on detail of encoding of these fields can be
          found in MIPI Alliance DisCo & SoundWire 1.0 Specifications.

      reg:
        maxItems: 1
        description:
          Link ID followed by Instance ID of SoundWire Device Address.

    required:
      - compatible
      - reg

required:
  - "#address-cells"
  - "#size-cells"

additionalProperties: true

examples:
  - |
    soundwire@c2d0000 {
        #address-cells = <2>;
        #size-cells = <0>;
        reg = <0x0c2d0000 0x2000>;

        speaker@0,1 {
            compatible = "sdw10217201000";

Annotation

Implementation Notes