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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/dma/fsl,elo-dma.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/dma/fsl,elo-dma.yaml#

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

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title: Freescale Elo DMA Controller

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maintainers:

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  - J. Neuschäfer <j.ne@posteo.net>

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description:

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  This is a little-endian 4-channel DMA controller, used in Freescale mpc83xx

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  series chips such as mpc8315, mpc8349, mpc8379 etc.

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properties:

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  compatible:

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    items:

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      - enum:

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          - fsl,mpc8313-dma

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          - fsl,mpc8315-dma

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          - fsl,mpc8323-dma

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          - fsl,mpc8347-dma

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          - fsl,mpc8349-dma

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          - fsl,mpc8360-dma

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          - fsl,mpc8377-dma

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          - fsl,mpc8378-dma

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          - fsl,mpc8379-dma

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      - const: fsl,elo-dma

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  reg:

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    items:

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      - description:

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          DMA General Status Register, i.e. DGSR which contains status for

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          all the 4 DMA channels.

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  cell-index:

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    $ref: /schemas/types.yaml#/definitions/uint32

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    description: Controller index. 0 for controller @ 0x8100.

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  ranges: true

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  "#address-cells":

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    const: 1

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  "#size-cells":

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    const: 1

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  interrupts:

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    maxItems: 1

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    description: Controller interrupt.

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required:

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  - compatible

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  - reg

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patternProperties:

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  "^dma-channel@[0-9a-f]+$":

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    type: object

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    additionalProperties: false

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    properties:

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      compatible:

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        oneOf:

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          # native DMA channel

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          - items:

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              - enum:

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                  - fsl,mpc8315-dma-channel

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                  - fsl,mpc8323-dma-channel

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                  - fsl,mpc8347-dma-channel

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                  - fsl,mpc8349-dma-channel

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                  - fsl,mpc8360-dma-channel

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                  - fsl,mpc8377-dma-channel

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                  - fsl,mpc8378-dma-channel

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                  - fsl,mpc8379-dma-channel

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              - const: fsl,elo-dma-channel

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          # audio DMA channel, see fsl,ssi.yaml

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          - const: fsl,ssi-dma-channel

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      reg:

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        maxItems: 1

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      cell-index:

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        description: DMA channel index starts at 0.

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      interrupts:

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        maxItems: 1

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        description:

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          Per-channel interrupt. Only necessary if no controller interrupt has

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          been provided.

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additionalProperties: false

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examples:

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  - |

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    #include <dt-bindings/interrupt-controller/irq.h>

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    dma@82a8 {

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        compatible = "fsl,mpc8349-dma", "fsl,elo-dma";

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        reg = <0x82a8 4>;

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        #address-cells = <1>;

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        #size-cells = <1>;

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        ranges = <0 0x8100 0x1a4>;

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        interrupts = <71 IRQ_TYPE_LEVEL_LOW>;

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        cell-index = <0>;

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        dma-channel@0 {

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            compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";

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            reg = <0 0x80>;

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            cell-index = <0>;

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            interrupts = <71 IRQ_TYPE_LEVEL_LOW>;

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        };

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        dma-channel@80 {

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            compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";

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            reg = <0x80 0x80>;

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            cell-index = <1>;

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            interrupts = <71 IRQ_TYPE_LEVEL_LOW>;

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        };

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        dma-channel@100 {

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            compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";

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            reg = <0x100 0x80>;

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            cell-index = <2>;

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            interrupts = <71 IRQ_TYPE_LEVEL_LOW>;

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        };

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        dma-channel@180 {

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            compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";

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            reg = <0x180 0x80>;

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            cell-index = <3>;

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            interrupts = <71 IRQ_TYPE_LEVEL_LOW>;

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        };

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    };

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...

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