# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
%YAML 1.2
|
---
|
$id: http://devicetree.org/schemas/dma/socionext,uniphier-xdmac.yaml#
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
title: Socionext UniPhier external DMA controller
|
|
description: |
|
This describes the devicetree bindings for an external DMA engine to perform
|
memory-to-memory or peripheral-to-memory data transfer capable of supporting
|
16 channels, implemented in Socionext UniPhier SoCs.
|
|
maintainers:
|
- Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
|
|
allOf:
|
- $ref: "dma-controller.yaml#"
|
|
properties:
|
compatible:
|
const: socionext,uniphier-xdmac
|
|
reg:
|
maxItems: 1
|
|
interrupts:
|
maxItems: 1
|
|
"#dma-cells":
|
const: 2
|
description: |
|
DMA request from clients consists of 2 cells:
|
1. Channel index
|
2. Transfer request factor number, If no transfer factor, use 0.
|
The number is SoC-specific, and this should be specified with
|
relation to the device to use the DMA controller.
|
|
dma-channels:
|
minimum: 1
|
maximum: 16
|
|
additionalProperties: false
|
|
required:
|
- compatible
|
- reg
|
- interrupts
|
- "#dma-cells"
|
- dma-channels
|
|
examples:
|
- |
|
xdmac: dma-controller@5fc10000 {
|
compatible = "socionext,uniphier-xdmac";
|
reg = <0x5fc10000 0x5300>;
|
interrupts = <0 188 4>;
|
#dma-cells = <2>;
|
dma-channels = <16>;
|
};
|
|
...
|
