dt-bindings: dma: renesas,usb-dmac: convert bindings to json-schema

* Renesas USB DMA Controller Device Tree bindings

Required Properties:

-compatible: "renesas,<soctype>-usb-dmac", "renesas,usb-dmac" as fallback.

	Examples with soctypes are:

	  - "renesas,r8a7743-usb-dmac" (RZ/G1M)

	  - "renesas,r8a7744-usb-dmac" (RZ/G1N)

	  - "renesas,r8a7745-usb-dmac" (RZ/G1E)

	  - "renesas,r8a77470-usb-dmac" (RZ/G1C)

	  - "renesas,r8a774a1-usb-dmac" (RZ/G2M)

	  - "renesas,r8a774b1-usb-dmac" (RZ/G2N)

	  - "renesas,r8a774c0-usb-dmac" (RZ/G2E)

	  - "renesas,r8a7790-usb-dmac" (R-Car H2)

	  - "renesas,r8a7791-usb-dmac" (R-Car M2-W)

	  - "renesas,r8a7793-usb-dmac" (R-Car M2-N)

	  - "renesas,r8a7794-usb-dmac" (R-Car E2)

	  - "renesas,r8a7795-usb-dmac" (R-Car H3)

	  - "renesas,r8a7796-usb-dmac" (R-Car M3-W)

	  - "renesas,r8a77961-usb-dmac" (R-Car M3-W+)

	  - "renesas,r8a77965-usb-dmac" (R-Car M3-N)

	  - "renesas,r8a77990-usb-dmac" (R-Car E3)

	  - "renesas,r8a77995-usb-dmac" (R-Car D3)

- reg: base address and length of the registers block for the DMAC

- interrupts: interrupt specifiers for the DMAC, one for each entry in

  interrupt-names.

- interrupt-names: one entry per channel, named "ch%u", where %u is the

  channel number ranging from zero to the number of channels minus one.

- clocks: a list of phandle + clock-specifier pairs.

- #dma-cells: must be <1>, the cell specifies the channel number of the DMAC

  port connected to the DMA client.

- dma-channels: number of DMA channels

Example: R8A7790 (R-Car H2) USB-DMACs

	usb_dmac0: dma-controller@e65a0000 {

		compatible = "renesas,r8a7790-usb-dmac", "renesas,usb-dmac";

		reg = <0 0xe65a0000 0 0x100>;

		interrupts = <0 109 IRQ_TYPE_LEVEL_HIGH

			      0 109 IRQ_TYPE_LEVEL_HIGH>;

		interrupt-names = "ch0", "ch1";

		clocks = <&mstp3_clks R8A7790_CLK_USBDMAC0>;

		#dma-cells = <1>;

		dma-channels = <2>;

	};

	usb_dmac1: dma-controller@e65b0000 {

		compatible = "renesas,usb-dmac";

		reg = <0 0xe65b0000 0 0x100>;

		interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH

			      0 110 IRQ_TYPE_LEVEL_HIGH>;

		interrupt-names = "ch0", "ch1";

		clocks = <&mstp3_clks R8A7790_CLK_USBDMAC1>;

		#dma-cells = <1>;

		dma-channels = <2>;

	};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/dma/renesas,usb-dmac.yaml#

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

title: Renesas USB DMA Controller

maintainers:

  - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

allOf:

  - $ref: "dma-controller.yaml#"

properties:

  compatible:

    items:

      - enum:

          - renesas,r8a7743-usb-dmac  # RZ/G1M

          - renesas,r8a7744-usb-dmac  # RZ/G1N

          - renesas,r8a7745-usb-dmac  # RZ/G1E

          - renesas,r8a77470-usb-dmac # RZ/G1C

          - renesas,r8a774a1-usb-dmac # RZ/G2M

          - renesas,r8a774b1-usb-dmac # RZ/G2N

          - renesas,r8a774c0-usb-dmac # RZ/G2E

          - renesas,r8a7790-usb-dmac  # R-Car H2

          - renesas,r8a7791-usb-dmac  # R-Car M2-W

          - renesas,r8a7793-usb-dmac  # R-Car M2-N

          - renesas,r8a7794-usb-dmac  # R-Car E2

          - renesas,r8a7795-usb-dmac  # R-Car H3

          - renesas,r8a7796-usb-dmac  # R-Car M3-W

          - renesas,r8a77961-usb-dmac # R-Car M3-W+

          - renesas,r8a77965-usb-dmac # R-Car M3-N

          - renesas,r8a77990-usb-dmac # R-Car E3

          - renesas,r8a77995-usb-dmac # R-Car D3

      - const: renesas,usb-dmac

  reg:

    maxItems: 1

  interrupts:

    minItems: 2

    maxItems: 2

  interrupt-names:

    items:

      - pattern: ch0

      - pattern: ch1

  clocks:

    maxItems: 1

  '#dma-cells':

    const: 1

    description:

      The cell specifies the channel number of the DMAC port connected to

      the DMA client.

  dma-channels:

    const: 2

  iommus:

    minItems: 2

    maxItems: 2

  power-domains:

    maxItems: 1

  resets:

    maxItems: 1

required:

  - compatible

  - reg

  - interrupts

  - interrupt-names

  - clocks

  - '#dma-cells'

  - dma-channels

  - power-domains

  - resets

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/r8a7790-cpg-mssr.h>

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

    #include <dt-bindings/power/r8a7790-sysc.h>

    usb_dmac0: dma-controller@e65a0000 {

        compatible = "renesas,r8a7790-usb-dmac", "renesas,usb-dmac";

        reg = <0xe65a0000 0x100>;

        interrupts = <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,

                     <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>;

        interrupt-names = "ch0", "ch1";

        clocks = <&cpg CPG_MOD 330>;

        power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;

        resets = <&cpg 330>;

        #dma-cells = <1>;

        dma-channels = <2>;

    };