Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
Extension
.yaml
Size
4306 bytes
Lines
145
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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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/fsl,rpmsg.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NXP Audio RPMSG CPU DAI Controller

maintainers:
  - Shengjiu Wang <shengjiu.wang@nxp.com>

description: |
  fsl_rpmsg is a virtual audio device. Mapping to real hardware devices
  are SAI, MICFIL, DMA controlled by Cortex M core. What we see from
  Linux side is a device which provides audio service by rpmsg channel.
  We can create different sound cards which access different hardwares
  such as SAI, MICFIL, .etc through building rpmsg channels between
  Cortex-A and Cortex-M.

allOf:
  - $ref: sound-card-common.yaml#

properties:
  compatible:
    oneOf:
      - enum:
          - fsl,imx7ulp-rpmsg-audio
          - fsl,imx8mn-rpmsg-audio
          - fsl,imx8mm-rpmsg-audio
          - fsl,imx8mp-rpmsg-audio
          - fsl,imx8ulp-rpmsg-audio
          - fsl,imx93-rpmsg-audio
          - fsl,imx95-rpmsg-audio
      - items:
          - enum:
              - fsl,imx94-rpmsg-audio
              - fsl,imx952-rpmsg-audio
          - const: fsl,imx95-rpmsg-audio

  clocks:
    items:
      - description: Peripheral clock for register access
      - description: Master clock
      - description: DMA clock for DMA register access
      - description: Parent clock for multiple of 8kHz sample rates
      - description: Parent clock for multiple of 11kHz sample rates

  clock-names:
    items:
      - const: ipg
      - const: mclk
      - const: dma
      - const: pll8k
      - const: pll11k

  power-domains:
    description:
      List of phandle and PM domain specifier as documented in
      Documentation/devicetree/bindings/power/power_domain.txt
    maxItems: 1

  memory-region:
    maxItems: 1
    description:
      phandle to a node describing reserved memory (System RAM memory)
      The M core can't access all the DDR memory space on some platform,
      So reserved a specific memory for dma buffer which M core can
      access.
      (see bindings/reserved-memory/reserved-memory.txt)

Annotation

Implementation Notes