1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/dma/dma-com
5 $schema: http://devicetree.org/meta-schemas/co
6
7 title: DMA Engine Common Properties
8
9 maintainers:
10 - Vinod Koul <vkoul@kernel.org>
11
12 description:
13 Generic binding to provide a way for a drive
14 retrieve the DMA request or channel informat
15 hardware device to a DMA controller.
16
17 select: false
18
19 properties:
20 "#dma-cells":
21 minimum: 1
22 # Should be enough
23 maximum: 255
24 description:
25 Used to provide DMA controller specific
26
27 dma-channel-mask:
28 description:
29 Bitmask of available DMA channels in asc
30 not reserved by firmware and are availab
31 kernel. i.e. first channel corresponds t
32 The first item in the array is for chann
33 channels 32-63, etc.
34 $ref: /schemas/types.yaml#/definitions/uin
35 items:
36 minItems: 1
37 # Should be enough
38 maxItems: 255
39
40 dma-channels:
41 $ref: /schemas/types.yaml#/definitions/uin
42 description:
43 Number of DMA channels supported by the
44
45 dma-requests:
46 $ref: /schemas/types.yaml#/definitions/uin
47 description:
48 Number of DMA request signals supported
49
50 required:
51 - "#dma-cells"
52
53 additionalProperties: true
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