Commit 45a24e40 authored by Animesh Agarwal's avatar Animesh Agarwal Committed by Vinod Koul
Browse files

dt-bindings: dma: fsl,imx-dma: Convert to dtschema 



Convert the fsl i.MX DMA controller bindings to DT schema. Remove old
and deprecated properties #dma-channels and #dma-requests.

Signed-off-by: default avatarAnimesh Agarwal <animeshagarwal28@gmail.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240605003356.46458-1-animeshagarwal28@gmail.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent a5dc4042

Documentation/devicetree/bindings/dma/fsl,imx-dma.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/fsl,imx-dma.yaml#

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



title: Freescale Direct Memory Access (DMA) Controller for i.MX



maintainers:

  - Animesh Agarwal <animeshagarwal28@gmail.com>



allOf:

  - $ref: dma-controller.yaml#



properties:

  compatible:

    enum:

      - fsl,imx1-dma

      - fsl,imx21-dma

      - fsl,imx27-dma



  reg:

    maxItems: 1



  interrupts:

    items:

      - description: DMA complete interrupt

      - description: DMA Error interrupt

    minItems: 1



  "#dma-cells":

    const: 1



  dma-channels:

    const: 16



  dma-requests:

    description: Number of DMA requests supported.



required:

  - compatible

  - reg

  - interrupts

  - "#dma-cells"



additionalProperties: false



examples:

  - |

    dma-controller@10001000 {

      compatible = "fsl,imx27-dma";

      reg = <0x10001000 0x1000>;

      interrupts = <32 33>;

      #dma-cells = <1>;

      dma-channels = <16>;

    };

Documentation/devicetree/bindings/dma/fsl-imx-dma.txt

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* Freescale Direct Memory Access (DMA) Controller for i.MX



This document will only describe differences to the generic DMA Controller and

DMA request bindings as described in dma/dma.txt .



* DMA controller



Required properties:

- compatible : Should be "fsl,<chip>-dma". chip can be imx1, imx21 or imx27

- reg : Should contain DMA registers location and length

- interrupts : First item should be DMA interrupt, second one is optional and

    should contain DMA Error interrupt

- #dma-cells : Has to be 1. imx-dma does not support anything else.



Optional properties:

- dma-channels : Number of DMA channels supported. Should be 16.

- #dma-channels : deprecated

- dma-requests : Number of DMA requests supported.

- #dma-requests : deprecated



Example:



	dma: dma@10001000 {

		compatible = "fsl,imx27-dma";

		reg = <0x10001000 0x1000>;

		interrupts = <32 33>;

		#dma-cells = <1>;

		dma-channels = <16>;

	};





* DMA client



Clients have to specify the DMA requests with phandles in a list.



Required properties:

- dmas: List of one or more DMA request specifiers. One DMA request specifier

    consists of a phandle to the DMA controller followed by the integer

    specifying the request line.

- dma-names: List of string identifiers for the DMA requests. For the correct

    names, have a look at the specific client driver.



Example:



	sdhci1: sdhci@10013000 {

		...

		dmas = <&dma 7>;

		dma-names = "rx-tx";

		...

	};