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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/dma-common.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: DMA Engine Generic Binding
maintainers:
- Vinod Koul <vkoul@kernel.org>
description:
Generic binding to provide a way for a driver using DMA Engine to
retrieve the DMA request or channel information that goes from a
hardware device to a DMA controller.
select: false
properties:
"#dma-cells":
minimum: 1
# Should be enough
maximum: 255
description:
Used to provide DMA controller specific information.
dma-channel-mask:
$ref: /schemas/types.yaml#definitions/uint32
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:
$ref: /schemas/types.yaml#definitions/uint32
description:
Number of DMA channels supported by the controller.
dma-requests:
$ref: /schemas/types.yaml#definitions/uint32
description:
Number of DMA request signals supported by the controller.
required:
- "#dma-cells"
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