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
7 title: NVIDIA Tegra20 I2S Controller
8
9 description: |
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
14 maintainers:
15 - Thierry Reding <treding@nvidia.com>
16 - Jon Hunter <jonathanh@nvidia.com>
17
18 properties:
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
52 required:
53 - compatible
54 - reg
55 - resets
56 - reset-names
57 - interrupts
58 - clocks
59 - dmas
60 - dma-names
61
62 additionalProperties: false
63
64 examples:
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 ...
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