1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/dma/socionext,uniphier-xdmac.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Socionext UniPhier external DMA controller
8
9description: |
10  This describes the devicetree bindings for an external DMA engine to perform
11  memory-to-memory or peripheral-to-memory data transfer capable of supporting
12  16 channels, implemented in Socionext UniPhier SoCs.
13
14maintainers:
15  - Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
16
17allOf:
18  - $ref: "dma-controller.yaml#"
19
20properties:
21  compatible:
22    const: socionext,uniphier-xdmac
23
24  reg:
25    maxItems: 1
26
27  interrupts:
28    maxItems: 1
29
30  "#dma-cells":
31    const: 2
32    description: |
33      DMA request from clients consists of 2 cells:
34        1. Channel index
35        2. Transfer request factor number, If no transfer factor, use 0.
36           The number is SoC-specific, and this should be specified with
37           relation to the device to use the DMA controller.
38
39  dma-channels:
40    minimum: 1
41    maximum: 16
42
43additionalProperties: false
44
45required:
46  - compatible
47  - reg
48  - interrupts
49  - "#dma-cells"
50  - dma-channels
51
52examples:
53  - |
54    xdmac: dma-controller@5fc10000 {
55        compatible = "socionext,uniphier-xdmac";
56        reg = <0x5fc10000 0x5300>;
57        interrupts = <0 188 4>;
58        #dma-cells = <2>;
59        dma-channels = <16>;
60    };
61
62...
63