Documentation/devicetree/bindings/sound/microchip,sama7g5-pdmc.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/sound/microchip,sama7g5-pdmc.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/sound/microchip,sama7g5-pdmc.yaml
Extension
.yaml
Size
2759 bytes
Lines
106
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 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/microchip,sama7g5-pdmc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Microchip Pulse Density Microphone Controller

maintainers:
  - Codrin Ciubotariu <codrin.ciubotariu@microchip.com>

description:
  The Microchip Pulse Density Microphone Controller (PDMC) interfaces up to 4
  digital microphones having Pulse Density Modulated (PDM) outputs.

allOf:
  - $ref: dai-common.yaml#

properties:
  compatible:
    const: microchip,sama7g5-pdmc

  reg:
    maxItems: 1

  "#sound-dai-cells":
    const: 0

  interrupts:
    maxItems: 1

  clocks:
    items:
      - description: Peripheral Bus Clock
      - description: Generic Clock

  clock-names:
    items:
      - const: pclk
      - const: gclk

  dmas:
    description: RX DMA Channel
    maxItems: 1

  dma-names:
    const: rx

  microchip,mic-pos:
    description: |
      Position of PDM microphones on the DS line and the sampling edge (rising
      or falling) of the CLK line. A microphone is represented as a pair of DS
      line and the sampling edge. The first microphone is mapped to channel 0,
      the second to channel 1, etc.
    $ref: /schemas/types.yaml#/definitions/uint32-matrix
    items:
      items:
        - description: value for DS line
          enum: [0, 1]
        - description: value for sampling edge
          enum: [0, 1]
    minItems: 1
    maxItems: 4
    uniqueItems: true

  microchip,startup-delay-us:
    description: |
      Specifies the delay in microseconds that needs to be applied after
      enabling the PDMC microphones to avoid unwanted noise due to microphones
      not being ready.

Annotation

Implementation Notes