Bindings/dma/socionext,uniphier-xdmac.yaml

   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
   7 title: Socionext UniPhier external DMA controller
   8
   9 description: |
  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
  14 maintainers:
  15   - Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
  16
  17 allOf:
  18   - $ref: dma-controller.yaml#
  19
  20 properties:
  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
  43 additionalProperties: false
  44
  45 required:
  46   - compatible
  47   - reg
  48   - interrupts
  49   - "#dma-cells"
  50   - dma-channels
  51
  52 examples:
  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 ...