Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/nvidia,tegra186-gpc-dma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NVIDIA Tegra GPC DMA Controller

description: |
  The Tegra General Purpose Central (GPC) DMA controller is used for faster
  data transfers between memory to memory, memory to device and device to
  memory.

maintainers:
  - Jon Hunter <jonathanh@nvidia.com>
  - Rajesh Gumasta <rgumasta@nvidia.com>

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

properties:
  compatible:
    oneOf:
      - const: nvidia,tegra186-gpcdma
      - items:
          - enum:
              - nvidia,tegra234-gpcdma
              - nvidia,tegra194-gpcdma
          - const: nvidia,tegra186-gpcdma

  "#dma-cells":
    const: 1

  reg:
    maxItems: 1

  interrupts:
    description:
      Should contain all of the per-channel DMA interrupts in
      ascending order with respect to the DMA channel index.
    minItems: 1
    maxItems: 32

  resets:
    maxItems: 1

  reset-names:
    const: gpcdma

  iommus:
    maxItems: 1

  dma-coherent: true

  dma-channel-mask:
    maxItems: 1

required:
  - compatible
  - reg
  - interrupts
  - resets
  - reset-names
  - "#dma-cells"
  - iommus
  - dma-channel-mask

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/memory/tegra186-mc.h>
    #include <dt-bindings/reset/tegra186-reset.h>

    dma-controller@2600000 {
        compatible = "nvidia,tegra186-gpcdma";
        reg = <0x2600000 0x210000>;
        resets = <&bpmp TEGRA186_RESET_GPCDMA>;
        reset-names = "gpcdma";
        interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 79 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 99 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH>;
        #dma-cells = <1>;
        iommus = <&smmu TEGRA186_SID_GPCDMA_0>;
        dma-coherent;
        dma-channel-mask = <0xfffffffe>;
    };
...