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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/dma/fsl,elo3-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,elo3-dma.yaml#

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

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title: Freescale Elo3 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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  DMA controller which has same function as EloPlus except that Elo3 has 8

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  channels while EloPlus has only 4, it is used in Freescale Txxx and Bxxx

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  series chips, such as t1040, t4240, b4860.

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properties:

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  compatible:

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    const: fsl,elo3-dma

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  reg:

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    items:

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      - description:

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          DMA General Status Registers starting from DGSR0, for channel 1~4

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      - description:

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          DMA General Status Registers starting from DGSR1, for channel 5~8

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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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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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        enum:

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          # native DMA channel

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          - fsl,eloplus-dma-channel

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          # audio DMA channel, see fsl,ssi.yaml

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          - fsl,ssi-dma-channel

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      reg:

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        maxItems: 1

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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@100300 {

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        compatible = "fsl,elo3-dma";

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        reg = <0x100300 0x4>,

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              <0x100600 0x4>;

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        #address-cells = <1>;

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        #size-cells = <1>;

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        ranges = <0x0 0x100100 0x500>;

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        dma-channel@0 {

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            compatible = "fsl,eloplus-dma-channel";

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            reg = <0x0 0x80>;

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            interrupts = <28 IRQ_TYPE_EDGE_FALLING 0 0>;

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        };

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        dma-channel@80 {

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            compatible = "fsl,eloplus-dma-channel";

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            reg = <0x80 0x80>;

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            interrupts = <29 IRQ_TYPE_EDGE_FALLING 0 0>;

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        };

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        dma-channel@100 {

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            compatible = "fsl,eloplus-dma-channel";

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            reg = <0x100 0x80>;

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            interrupts = <30 IRQ_TYPE_EDGE_FALLING 0 0>;

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        };

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        dma-channel@180 {

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            compatible = "fsl,eloplus-dma-channel";

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            reg = <0x180 0x80>;

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            interrupts = <31 IRQ_TYPE_EDGE_FALLING 0 0>;

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        };

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        dma-channel@300 {

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            compatible = "fsl,eloplus-dma-channel";

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            reg = <0x300 0x80>;

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            interrupts = <76 IRQ_TYPE_EDGE_FALLING 0 0>;

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        };

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        dma-channel@380 {

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            compatible = "fsl,eloplus-dma-channel";

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            reg = <0x380 0x80>;

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            interrupts = <77 IRQ_TYPE_EDGE_FALLING 0 0>;

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        };

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        dma-channel@400 {

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            compatible = "fsl,eloplus-dma-channel";

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            reg = <0x400 0x80>;

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            interrupts = <78 IRQ_TYPE_EDGE_FALLING 0 0>;

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        };

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        dma-channel@480 {

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            compatible = "fsl,eloplus-dma-channel";

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            reg = <0x480 0x80>;

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            interrupts = <79 IRQ_TYPE_EDGE_FALLING 0 0>;

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        };

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    };

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...

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