Documentation/devicetree/bindings/dma/dma-router.yaml

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/dma/dma-router.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: DMA Router Common Properties
   8
   9 maintainers:
  10   - Vinod Koul <vkoul@kernel.org>
  11
  12 allOf:
  13   - $ref: dma-common.yaml#
  14
  15 description:
  16   DMA routers are transparent IP blocks used to route DMA request
  17   lines from devices to the DMA controller. Some SoCs (like TI DRA7x)
  18   have more peripherals integrated with DMA requests than what the DMA
  19   controller can handle directly.
  20
  21 properties:
  22   $nodename:
  23     pattern: "^dma-router(@.*)?$"
  24
  25   dma-masters:
  26     $ref: /schemas/types.yaml#/definitions/phandle-array
  27     items:
  28       maxItems: 1
  29     description:
  30       Array of phandles to the DMA controllers the router can direct
  31       the signal to.
  32
  33   dma-requests:
  34     description:
  35       Number of incoming request lines the router can handle.
  36
  37 required:
  38   - "#dma-cells"
  39   - dma-masters
  40
  41 additionalProperties: true
  42
  43 examples:
  44   - |
  45     sdma_xbar: dma-router@4a002b78 {
  46         compatible = "ti,dra7-dma-crossbar";
  47         reg = <0x4a002b78 0xfc>;
  48         #dma-cells = <1>;
  49         dma-requests = <205>;
  50         ti,dma-safe-map = <0>;
  51         dma-masters = <&sdma>;
  52     };
  53
  54 ...