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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/nvidia,tegra210-i2s.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Tegra210 I2S Controller Device Tree Bindings
description: |
The Inter-IC Sound (I2S) controller implements full-duplex,
bi-directional and single direction point-to-point serial
interfaces. It can interface with I2S compatible devices.
I2S controller can operate both in master and slave mode.
maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: audio-graph-port.yaml#
properties:
$nodename:
pattern: "^i2s@[0-9a-f]*$"
compatible:
oneOf:
- const: nvidia,tegra210-i2s
- items:
- enum:
- nvidia,tegra194-i2s
- nvidia,tegra186-i2s
- const: nvidia,tegra210-i2s
reg:
maxItems: 1
clocks:
minItems: 1
maxItems: 2
items:
- description: I2S bit clock
- description:
Sync input clock, which can act as clock source to other I/O
modules in AHUB. The Tegra I2S driver sets this clock rate as
per bit clock rate. I/O module which wants to use this clock
as source, can mention this clock as parent in the DT bindings.
This is an optional clock entry, since it is only required when
some other I/O wants to reference from a particular I2Sx
instance.
clock-names:
minItems: 1
maxItems: 2
items:
- const: i2s
- const: sync_input
assigned-clocks:
minItems: 1
maxItems: 2
assigned-clock-parents:
minItems: 1
maxItems: 2
assigned-clock-rates:
minItems: 1
maxItems: 2
sound-name-prefix:
pattern: "^I2S[1-9]$"
$ref: /schemas/types.yaml#/definitions/string
description:
Used as prefix for sink/source names of the component. Must be a
unique string among multiple instances of the same component.
The name can be "I2S1" or "I2S2" ... "I2Sx", where x depends
on the maximum available instances on a Tegra SoC.
ports:
type: object
properties:
port@0:
description: |
I2S ACIF (Audio Client Interface) port connected to the
corresponding AHUB (Audio Hub) ACIF port.
port@1:
description: |
I2S DAP (Digital Audio Port) interface which can be connected
to external audio codec for playback or capture.
required:
- compatible
- reg
- clocks
- clock-names
- assigned-clocks
- assigned-clock-parents
unevaluatedProperties: false
examples:
- |
#include<dt-bindings/clock/tegra210-car.h>
i2s@702d1000 {
compatible = "nvidia,tegra210-i2s";
reg = <0x702d1000 0x100>;
clocks = <&tegra_car TEGRA210_CLK_I2S0>;
clock-names = "i2s";
assigned-clocks = <&tegra_car TEGRA210_CLK_I2S0>;
assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
assigned-clock-rates = <1536000>;
sound-name-prefix = "I2S1";
};
...
|
