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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,tegra20-i2s.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: NVIDIA Tegra20 I2S Controller
description: |
The I2S Controller streams synchronous serial audio data between system
memory and an external audio device. The controller supports the I2S Left
Justified Mode, Right Justified Mode, and DSP mode formats.
maintainers:
- Thierry Reding <treding@nvidia.com>
- Jon Hunter <jonathanh@nvidia.com>
properties:
compatible:
const: nvidia,tegra20-i2s
reg:
maxItems: 1
resets:
maxItems: 1
reset-names:
const: i2s
interrupts:
maxItems: 1
clocks:
minItems: 1
dmas:
minItems: 2
dma-names:
items:
- const: rx
- const: tx
nvidia,fixed-parent-rate:
description: |
Specifies whether board prefers parent clock to stay at a fixed rate.
This allows multiple Tegra20 audio components work simultaneously by
limiting number of supportable audio rates.
type: boolean
required:
- compatible
- reg
- resets
- reset-names
- interrupts
- clocks
- dmas
- dma-names
additionalProperties: false
examples:
- |
i2s@70002800 {
compatible = "nvidia,tegra20-i2s";
reg = <0x70002800 0x200>;
interrupts = <45>;
clocks = <&tegra_car 11>;
resets = <&tegra_car 11>;
reset-names = "i2s";
dmas = <&apbdma 21>, <&apbdma 21>;
dma-names = "rx", "tx";
};
...
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