| # 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>; |
| }; |
| |
| ... |
