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