dts/bindings/dma/dma-controller.yaml

# Copyright (c) 2019, Song Qiang <songqiang1304521@gmail.com>
# SPDX-License-Identifier: Apache-2.0

# Common fields for DMA controllers

include: base.yaml

bus: dma

properties:
  "#dma-cells":
    type: int
    required: true
    description: Number of items to expect in a DMA specifier

  dma-channel-mask:
    type: int
    description: |
      Bitmask of available DMA channels in ascending order that are
      not reserved by firmware and are available to the
      kernel. i.e. first channel corresponds to LSB.

  dma-channels:
    type: int
    description: Number of DMA channels supported by the controller

  dma-requests:
    type: int
    description: Number of DMA request signals supported by the controller.

  dma-buf-addr-alignment:
    type: int
    description: Memory address alignment requirement for DMA buffers used by the controller.

  dma-buf-size-alignment:
    type: int
    description: Memory size alignment requirement for DMA buffers used by the controller.

  dma-copy-alignment:
    type: int
    description: Minimal chunk of data possible to be copied by the controller.