Documentation/devicetree/bindings/dma/socionext,uniphier-mio-dmac.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/dma/socionext,uniphier-mio-dmac.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/dma/socionext,uniphier-mio-dmac.yaml
Extension
.yaml
Size
1474 bytes
Lines
64
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/socionext,uniphier-mio-dmac.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: UniPhier Media IO DMA controller

description: |
  This works as an external DMA engine for SD/eMMC controllers etc.
  found in UniPhier LD4, Pro4, sLD8 SoCs.

maintainers:
  - Masahiro Yamada <yamada.masahiro@socionext.com>

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

properties:
  compatible:
    const: socionext,uniphier-mio-dmac

  reg:
    maxItems: 1

  interrupts:
    description: |
      A list of interrupt specifiers associated with the DMA channels.
      The number of interrupt lines is SoC-dependent.

  clocks:
    maxItems: 1

  resets:
    maxItems: 1

  '#dma-cells':
    description: The single cell represents the channel index.
    const: 1

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - '#dma-cells'

additionalProperties: false

examples:
  - |
    // In the example below, "interrupts = <0 68 4>, <0 68 4>, ..." is not a
    // typo. The first two channels share a single interrupt line.

    dmac: dma-controller@5a000000 {
        compatible = "socionext,uniphier-mio-dmac";
        reg = <0x5a000000 0x1000>;
        interrupts = <0 68 4>, <0 68 4>, <0 69 4>, <0 70 4>,
                     <0 71 4>, <0 72 4>, <0 73 4>, <0 74 4>;
        clocks = <&mio_clk 7>;
        resets = <&mio_rst 7>;
        #dma-cells = <1>;
    };

Annotation

Implementation Notes