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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#
title: Apple Audio DMA Controller (ADMAC)
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>
allOf:
- $ref: dma-controller.yaml#
properties:
compatible:
items:
- enum:
- apple,t6000-admac
- apple,t8103-admac
- apple,t8112-admac
- const: apple,admac
reg:
maxItems: 1
'#dma-cells':
const: 1
description:
Clients specify a single cell with channel number.
dma-channels:
maximum: 24
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>.
iommus:
minItems: 1
maxItems: 2
power-domains:
maxItems: 1
resets:
maxItems: 1
required:
- compatible
- reg
- '#dma-cells'
- dma-channels
- interrupts
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/apple-aic.h>
#include <dt-bindings/interrupt-controller/irq.h>
aic: interrupt-controller {
interrupt-controller;
#interrupt-cells = <3>;
};
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>;
};
|
