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Diffstat (limited to 'Documentation/devicetree/bindings/dma/dma-common.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/dma/dma-common.yaml | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/dma-common.yaml b/Documentation/devicetree/bindings/dma/dma-common.yaml new file mode 100644 index 0000000000..ea700f8ee6 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/dma-common.yaml @@ -0,0 +1,53 @@ +# 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 Common Properties + +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: + 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 |