mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.4 KiB
53 lines
1.4 KiB
# 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 <[email protected]> |
|
|
|
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: |
|
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. |
|
The first item in the array is for channels 0-31, the second is for |
|
channels 32-63, etc. |
|
$ref: /schemas/types.yaml#/definitions/uint32-array |
|
items: |
|
minItems: 1 |
|
# Should be enough |
|
maxItems: 255 |
|
|
|
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" |
|
|
|
additionalProperties: true
|
|
|