91 lines
2.1 KiB
YAML
91 lines
2.1 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/dma/apple,admac.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Apple Audio DMA Controller (ADMAC)
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description: |
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Apple's Audio DMA Controller (ADMAC) is used to fetch and store audio samples
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on SoCs from the "Apple Silicon" family.
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The controller has been seen with up to 24 channels. Even-numbered channels
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are TX-only, odd-numbered are RX-only. Individual channels are coupled to
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fixed device endpoints.
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maintainers:
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- Martin Povišer <povik+lin@cutebit.org>
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allOf:
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- $ref: dma-controller.yaml#
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properties:
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compatible:
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items:
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- enum:
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- apple,t6000-admac
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- apple,t8103-admac
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- const: apple,admac
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reg:
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maxItems: 1
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'#dma-cells':
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const: 1
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description:
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Clients specify a single cell with channel number.
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dma-channels:
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maximum: 24
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interrupts:
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minItems: 4
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maxItems: 4
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description:
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Interrupts that correspond to the 4 IRQ outputs of the controller. Usually
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only one of the controller outputs will be connected as an usable interrupt
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source. The remaining interrupts will be left without a valid value, e.g.
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in an interrupts-extended list the disconnected positions will contain
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an empty phandle reference <0>.
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iommus:
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minItems: 1
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maxItems: 2
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power-domains:
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maxItems: 1
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resets:
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maxItems: 1
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required:
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- compatible
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- reg
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- '#dma-cells'
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- dma-channels
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- interrupts
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/apple-aic.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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aic: interrupt-controller {
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interrupt-controller;
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#interrupt-cells = <3>;
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};
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admac: dma-controller@238200000 {
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compatible = "apple,t8103-admac", "apple,admac";
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reg = <0x38200000 0x34000>;
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dma-channels = <24>;
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interrupts-extended = <0>,
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<&aic AIC_IRQ 626 IRQ_TYPE_LEVEL_HIGH>,
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<0>,
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<0>;
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#dma-cells = <1>;
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};
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