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,tegra186-asrc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Tegra186 ASRC
8
9 description: |
10 Asynchronous Sample Rate Converter (ASRC) converts the sampling frequency
11 of the input signal from one frequency to another. It can handle over a
12 wide range of sample rate ratios (freq_in/freq_out) from 1:24 to 24:1.
13 ASRC has two modes of operation. One where ratio can be programmed in SW
14 and the other where it gets the information from ratio estimator module.
15
16 It supports sample rate conversions in the range of 8 to 192 kHz and
17 supports 6 streams upto 12 total channels. The input data size can be
18 16, 24 and 32 bits.
19
20 maintainers:
21 - Jon Hunter <jonathanh@nvidia.com>
22 - Mohan Kumar <mkumard@nvidia.com>
23 - Sameer Pujar <spujar@nvidia.com>
24
25 allOf:
26 - $ref: dai-common.yaml#
27
28 properties:
29 $nodename:
30 pattern: "^asrc@[0-9a-f]*$"
31
32 compatible:
33 oneOf:
34 - const: nvidia,tegra186-asrc
35 - items:
36 - enum:
37 - nvidia,tegra234-asrc
38 - nvidia,tegra194-asrc
39 - const: nvidia,tegra186-asrc
40
41 reg:
42 maxItems: 1
43
44 sound-name-prefix:
45 pattern: "^ASRC[1-9]$"
46
47 ports:
48 $ref: /schemas/graph.yaml#/properties/ports
49 description: |
50 ASRC has seven input ports and six output ports. Accordingly ACIF
51 (Audio Client Interfaces) port nodes are defined to represent the
52 ASRC inputs (port 0 to 6) and outputs (port 7 to 12). These are
53 connected to corresponding ports on AHUB (Audio Hub). Additional
54 input (port 6) is for receiving ratio information from estimator.
55
56 patternProperties:
57 '^port@[0-6]':
58 $ref: audio-graph-port.yaml#
59 unevaluatedProperties: false
60 description: ASRC ACIF input ports
61 '^port@[7-9]|1[1-2]':
62 $ref: audio-graph-port.yaml#
63 unevaluatedProperties: false
64 description: ASRC ACIF output ports
65
66 required:
67 - compatible
68 - reg
69
70 additionalProperties: false
71
72 examples:
73 - |
74
75 asrc@2910000 {
76 compatible = "nvidia,tegra186-asrc";
77 reg = <0x2910000 0x2000>;
78 sound-name-prefix = "ASRC1";
79 };
80
81 ...
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