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Apple's Audio DMA Controller (ADMAC) is used to fetch and store audio samples on SoCs from the "Apple Silicon" family. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Martin Povišer <povik+lin@cutebit.org> Link: https://lore.kernel.org/r/20220531213615.7822-2-povik+lin@cutebit.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause | ||
%YAML 1.2 | ||
--- | ||
$id: http://devicetree.org/schemas/dma/apple,admac.yaml# | ||
$schema: http://devicetree.org/meta-schemas/core.yaml# | ||
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title: Apple Audio DMA Controller (ADMAC) | ||
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description: | | ||
Apple's Audio DMA Controller (ADMAC) is used to fetch and store audio samples | ||
on SoCs from the "Apple Silicon" family. | ||
The controller has been seen with up to 24 channels. Even-numbered channels | ||
are TX-only, odd-numbered are RX-only. Individual channels are coupled to | ||
fixed device endpoints. | ||
maintainers: | ||
- Martin Povišer <povik+lin@cutebit.org> | ||
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allOf: | ||
- $ref: "dma-controller.yaml#" | ||
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properties: | ||
compatible: | ||
items: | ||
- enum: | ||
- apple,t6000-admac | ||
- apple,t8103-admac | ||
- const: apple,admac | ||
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reg: | ||
maxItems: 1 | ||
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'#dma-cells': | ||
const: 1 | ||
description: | ||
Clients specify a single cell with channel number. | ||
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dma-channels: | ||
maximum: 24 | ||
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interrupts: | ||
minItems: 4 | ||
maxItems: 4 | ||
description: | ||
Interrupts that correspond to the 4 IRQ outputs of the controller. Usually | ||
only one of the controller outputs will be connected as an usable interrupt | ||
source. The remaining interrupts will be left without a valid value, e.g. | ||
in an interrupts-extended list the disconnected positions will contain | ||
an empty phandle reference <0>. | ||
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required: | ||
- compatible | ||
- reg | ||
- '#dma-cells' | ||
- dma-channels | ||
- interrupts | ||
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additionalProperties: false | ||
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examples: | ||
- | | ||
#include <dt-bindings/interrupt-controller/apple-aic.h> | ||
#include <dt-bindings/interrupt-controller/irq.h> | ||
admac: dma-controller@238200000 { | ||
compatible = "apple,t8103-admac", "apple,admac"; | ||
reg = <0x38200000 0x34000>; | ||
dma-channels = <24>; | ||
interrupts-extended = <0>, | ||
<&aic AIC_IRQ 626 IRQ_TYPE_LEVEL_HIGH>, | ||
<0>, | ||
<0>; | ||
#dma-cells = <1>; | ||
}; |