Commit 994b5709 authored by Inochi Amaoto's avatar Inochi Amaoto Committed by Vinod Koul
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dt-bindings: dmaengine: Add dma multiplexer for CV18XX/SG200X series SoC 



The DMA IP of Sophgo CV18XX/SG200X is based on a DW AXI CORE, with
an additional channel remap register located in the top system control
area. The DMA channel is exclusive to each core.

In addition, the DMA multiplexer is a subdevice of system controller,
so this binding only contains necessary properties for the multiplexer
itself.

Add the dmamux binding for CV18XX/SG200X series SoC.

Signed-off-by: default avatarInochi Amaoto <inochiama@gmail.com>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20250611081000.1187374-2-inochiama@gmail.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 19272b37

Documentation/devicetree/bindings/dma/sophgo,cv1800b-dmamux.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/dma/sophgo,cv1800b-dmamux.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Sophgo CV1800/SG200 Series DMA multiplexer



maintainers:

  - Inochi Amaoto <inochiama@gmail.com>



description:

  The DMA multiplexer of CV1800 is a subdevice of the system

  controller. It support mapping 8 channels, but each channel

  can be mapped only once.



allOf:

  - $ref: dma-router.yaml#



properties:

  compatible:

    const: sophgo,cv1800b-dmamux



  reg:

    items:

      - description: DMA channal remapping register

      - description: DMA channel interrupt mapping register



  '#dma-cells':

    const: 2

    description:

      The first cells is device id. The second one is the cpu id.



  dma-masters:

    maxItems: 1



required:

  - reg

  - '#dma-cells'

  - dma-masters



additionalProperties: false



examples:

  - |

    dma-router@154 {

      compatible = "sophgo,cv1800b-dmamux";

      reg = <0x154 0x8>, <0x298 0x4>;

      #dma-cells = <2>;

      dma-masters = <&dmac>;

    };