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 allOf:
13 - $ref: sound-card-common.yaml#
14
15 properties:
16 compatible:
17 enum:
18 - fsl,imx-audio-card
19
20 patternProperties:
21 ".*-dai-link$":
22 description:
23 Each subnode represents a dai link. Subnodes of each dai links would be
24 cpu/codec dais.
25
26 type: object
27
28 properties:
29 link-name:
30 description: Indicates dai-link name and PCM stream name.
31 $ref: /schemas/types.yaml#/definitions/string
32 maxItems: 1
33
34 format:
35 description: audio format.
36 items:
37 enum:
38 - i2s
39 - dsp_b
40
41 dai-tdm-slot-num:
42 description: see tdm-slot.txt.
43 $ref: /schemas/types.yaml#/definitions/uint32
44
45 dai-tdm-slot-width:
46 description: see tdm-slot.txt.
47 $ref: /schemas/types.yaml#/definitions/uint32
48
49 cpu:
50 description: Holds subnode which indicates cpu dai.
51 type: object
52 additionalProperties: false
53 properties:
54 sound-dai:
55 maxItems: 1
56
57 codec:
58 description: Holds subnode which indicates codec dai.
59 type: object
60 additionalProperties: false
61 properties:
62 sound-dai:
63 minItems: 1
64 maxItems: 2
65
66 fsl,mclk-equal-bclk:
67 description: Indicates mclk can be equal to bclk, especially for sai interface
68 $ref: /schemas/types.yaml#/definitions/flag
69
70 required:
71 - link-name
72 - cpu
73
74 additionalProperties: false
75
76 required:
77 - compatible
78
79 unevaluatedProperties: false
80
81 examples:
82 - |
83 sound-ak4458 {
84 compatible = "fsl,imx-audio-card";
85 model = "ak4458-audio";
86 pri-dai-link {
87 link-name = "akcodec";
88 format = "i2s";
89 fsl,mclk-equal-bclk;
90 cpu {
91 sound-dai = <&sai1>;
92 };
93 codec {
94 sound-dai = <&ak4458_1>, <&ak4458_2>;
95 };
96 };
97 fe-dai-link {
98 link-name = "HiFi-ASRC-FE";
99 format = "i2s";
100 cpu {
101 sound-dai = <&easrc>;
102 };
103 };
104 be-dai-link {
105 link-name = "HiFi-ASRC-BE";
106 format = "dsp_b";
107 dai-tdm-slot-num = <8>;
108 dai-tdm-slot-width = <32>;
109 fsl,mclk-equal-bclk;
110 cpu {
111 sound-dai = <&sai1>;
112 };
113 codec {
114 sound-dai = <&ak4458_1>, <&ak4458_2>;
115 };
116 };
117 };
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