88 lines
2.1 KiB
YAML
88 lines
2.1 KiB
YAML
|
# 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
|
||
|
|
- 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
|
||
|
|
|
||
|
|
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>;
|
||
|
|
};
|