Documentation/devicetree/bindings/dma/owl-dma.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/dma/owl-dma.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/dma/owl-dma.yaml
Extension
.yaml
Size
1746 bytes
Lines
81
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
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/owl-dma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Actions Semi Owl SoCs DMA controller

description: |
  The OWL DMA is a general-purpose direct memory access controller capable of
  supporting 10 independent DMA channels for the Actions Semi S700 SoC and 12
  independent DMA channels for the S500 and S900 SoC variants.

maintainers:
  - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

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

properties:
  compatible:
    enum:
      - actions,s500-dma
      - actions,s700-dma
      - actions,s900-dma

  reg:
    maxItems: 1

  interrupts:
    description:
      controller supports 4 interrupts, which are freely assignable to the
      DMA channels.
    maxItems: 4

  "#dma-cells":
    const: 1

  dma-channels:
    maximum: 12

  dma-requests:
    maximum: 46

  clocks:
    maxItems: 1
    description:
      Phandle and Specifier of the clock feeding the DMA controller.

  power-domains:
    maxItems: 1

required:
  - compatible
  - reg
  - interrupts
  - "#dma-cells"
  - dma-channels
  - dma-requests
  - clocks

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    dma: dma-controller@e0260000 {
        compatible = "actions,s900-dma";
        reg = <0xe0260000 0x1000>;
        interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,

Annotation

Implementation Notes