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