63 lines
1.4 KiB
YAML
63 lines
1.4 KiB
YAML
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# 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 <hayashi.kunihiko@socionext.com>
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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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