1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/sound/imx-audio-card.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: NXP i.MX audio sound card.
8
9 maintainers:
10 - Shengjiu Wang <shengjiu.wang@nxp.com>
11
12 properties:
13 compatible:
14 enum:
15 - fsl,imx-audio-card
16
17 model:
18 $ref: /schemas/types.yaml#/definitions/string
19 description: User specified audio sound card name
20
21 audio-routing:
22 $ref: /schemas/types.yaml#/definitions/non-unique-string-array
23 description:
24 A list of the connections between audio components. Each entry is a
25 pair of strings, the first being the connection's sink, the second
26 being the connection's source. Valid names could be power supplies,
27 MicBias of codec and the jacks on the board.
28
29 patternProperties:
30 ".*-dai-link$":
31 description:
32 Each subnode represents a dai link. Subnodes of each dai links would be
33 cpu/codec dais.
34
35 type: object
36
37 properties:
38 link-name:
39 description: Indicates dai-link name and PCM stream name.
40 $ref: /schemas/types.yaml#/definitions/string
41 maxItems: 1
42
43 format:
44 description: audio format.
45 items:
46 enum:
47 - i2s
48 - dsp_b
49
50 dai-tdm-slot-num:
51 description: see tdm-slot.txt.
52 $ref: /schemas/types.yaml#/definitions/uint32
53
54 dai-tdm-slot-width:
55 description: see tdm-slot.txt.
56 $ref: /schemas/types.yaml#/definitions/uint32
57
58 cpu:
59 description: Holds subnode which indicates cpu dai.
60 type: object
61 properties:
62 sound-dai:
63 maxItems: 1
64
65 codec:
66 description: Holds subnode which indicates codec dai.
67 type: object
68 properties:
69 sound-dai:
70 minItems: 1
71 maxItems: 2
72
73 fsl,mclk-equal-bclk:
74 description: Indicates mclk can be equal to bclk, especially for sai interface
75 $ref: /schemas/types.yaml#/definitions/flag
76
77 required:
78 - link-name
79 - cpu
80
81 additionalProperties: false
82
83 required:
84 - compatible
85 - model
86
87 additionalProperties: false
88
89 examples:
90 - |
91 sound-ak4458 {
92 compatible = "fsl,imx-audio-card";
93 model = "ak4458-audio";
94 pri-dai-link {
95 link-name = "akcodec";
96 format = "i2s";
97 fsl,mclk-equal-bclk;
98 cpu {
99 sound-dai = <&sai1>;
100 };
101 codec {
102 sound-dai = <&ak4458_1>, <&ak4458_2>;
103 };
104 };
105 fe-dai-link {
106 link-name = "HiFi-ASRC-FE";
107 format = "i2s";
108 cpu {
109 sound-dai = <&easrc>;
110 };
111 };
112 be-dai-link {
113 link-name = "HiFi-ASRC-BE";
114 format = "dsp_b";
115 dai-tdm-slot-num = <8>;
116 dai-tdm-slot-width = <32>;
117 fsl,mclk-equal-bclk;
118 cpu {
119 sound-dai = <&sai1>;
120 };
121 codec {
122 sound-dai = <&ak4458_1>, <&ak4458_2>;
123 };
124 };
125 };
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