1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/sound/nvidia,tegra20-i2s.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NVIDIA Tegra20 I2S Controller
8
9description: |
10  The I2S Controller streams synchronous serial audio data between system
11  memory and an external audio device. The controller supports the I2S Left
12  Justified Mode, Right Justified Mode, and DSP mode formats.
13
14maintainers:
15  - Thierry Reding <treding@nvidia.com>
16  - Jon Hunter <jonathanh@nvidia.com>
17
18properties:
19  compatible:
20    const: nvidia,tegra20-i2s
21
22  reg:
23    maxItems: 1
24
25  resets:
26    maxItems: 1
27
28  reset-names:
29    const: i2s
30
31  interrupts:
32    maxItems: 1
33
34  clocks:
35    minItems: 1
36
37  dmas:
38    minItems: 2
39
40  dma-names:
41    items:
42      - const: rx
43      - const: tx
44
45  nvidia,fixed-parent-rate:
46    description: |
47      Specifies whether board prefers parent clock to stay at a fixed rate.
48      This allows multiple Tegra20 audio components work simultaneously by
49      limiting number of supportable audio rates.
50    type: boolean
51
52required:
53  - compatible
54  - reg
55  - resets
56  - reset-names
57  - interrupts
58  - clocks
59  - dmas
60  - dma-names
61
62additionalProperties: false
63
64examples:
65  - |
66    i2s@70002800 {
67        compatible = "nvidia,tegra20-i2s";
68        reg = <0x70002800 0x200>;
69        interrupts = <45>;
70        clocks = <&tegra_car 11>;
71        resets = <&tegra_car 11>;
72        reset-names = "i2s";
73        dmas = <&apbdma 21>, <&apbdma 21>;
74        dma-names = "rx", "tx";
75    };
76
77...
78