xref: /freebsd/sys/contrib/device-tree/Bindings/dma/nvidia,tegra20-apbdma.yaml (revision ae5de77ed78ae54d86cead5604869212e8008e6b)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/nvidia,tegra20-apbdma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NVIDIA Tegra APB DMA Controller

description:
  The NVIDIA Tegra APB DMA controller is a hardware component that
  enables direct memory access (DMA) on Tegra systems. It facilitates
  data transfer between I/O devices and main memory without constant
  CPU intervention.

maintainers:
  - Jonathan Hunter <jonathanh@nvidia.com>

properties:
  compatible:
    oneOf:
      - const: nvidia,tegra20-apbdma
      - items:
          - const: nvidia,tegra30-apbdma
          - const: nvidia,tegra20-apbdma

  reg:
    maxItems: 1

  "#dma-cells":
    const: 1

  clocks:
    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: dma

required:
  - compatible
  - reg
  - "#dma-cells"
  - clocks
  - interrupts
  - resets
  - reset-names

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

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/reset/tegra186-reset.h>
    dma-controller@6000a000 {
        compatible = "nvidia,tegra30-apbdma", "nvidia,tegra20-apbdma";
        reg = <0x6000a000 0x1200>;
        interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 142 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 149 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 150 IRQ_TYPE_LEVEL_HIGH>,
                     <GIC_SPI 151 IRQ_TYPE_LEVEL_HIGH>;
        clocks = <&tegra_car 34>;
        resets = <&tegra_car 34>;
        reset-names = "dma";
        #dma-cells = <1>;
    };
...