42 lines
1.1 KiB
YAML
42 lines
1.1 KiB
YAML
# Copyright (c) 2019, Song Qiang <songqiang1304521@gmail.com>
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# SPDX-License-Identifier: Apache-2.0
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# Common fields for DMA controllers
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include: base.yaml
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bus: dma
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properties:
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"#dma-cells":
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type: int
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required: true
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description: Number of items to expect in a DMA specifier
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dma-channel-mask:
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type: int
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description: |
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Bitmask of available DMA channels in ascending order that are
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not reserved by firmware and are available to the
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kernel. i.e. first channel corresponds to LSB.
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dma-channels:
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type: int
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description: Number of DMA channels supported by the controller
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dma-requests:
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type: int
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description: Number of DMA request signals supported by the controller.
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dma-buf-addr-alignment:
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type: int
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description: Memory address alignment requirement for DMA buffers used by the controller.
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dma-buf-size-alignment:
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type: int
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description: Memory size alignment requirement for DMA buffers used by the controller.
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dma-copy-alignment:
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type: int
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description: Minimal chunk of data possible to be copied by the controller.
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