Documentation/devicetree/bindings/dma/fsl,eloplus-dma.yaml

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

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/dma/fsl,eloplus-dma.yaml
Extension
.yaml
Size
3445 bytes
Lines
133
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/dma/fsl,eloplus-dma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Freescale EloPlus DMA Controller

maintainers:
  - J. Neuschäfer <j.ne@posteo.net>

description:
  This is a 4-channel DMA controller with extended addresses and chaining,
  mainly used in Freescale mpc85xx/86xx, Pxxx and BSC series chips, such as
  mpc8540, mpc8641 p4080, bsc9131 etc.

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - fsl,mpc8540-dma
              - fsl,mpc8541-dma
              - fsl,mpc8548-dma
              - fsl,mpc8555-dma
              - fsl,mpc8560-dma
              - fsl,mpc8572-dma
              - fsl,mpc8641-dma
          - const: fsl,eloplus-dma
      - const: fsl,eloplus-dma

  reg:
    items:
      - description:
          DMA General Status Register, i.e. DGSR which contains
          status for all the 4 DMA channels

  cell-index:
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      controller index.  0 for controller @ 0x21000, 1 for controller @ 0xc000

  ranges: true

  "#address-cells":
    const: 1

  "#size-cells":
    const: 1

  interrupts:
    maxItems: 1
    description: Controller interrupt.

patternProperties:
  "^dma-channel@[0-9a-f]+$":
    type: object
    additionalProperties: false

    properties:
      compatible:
        oneOf:
          # native DMA channel
          - items:
              - enum:
                  - fsl,mpc8540-dma-channel
                  - fsl,mpc8541-dma-channel
                  - fsl,mpc8548-dma-channel
                  - fsl,mpc8555-dma-channel
                  - fsl,mpc8560-dma-channel

Annotation

Implementation Notes