1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Device Tree for ULCB + Audio Graph Card
4 *
5 * Copyright (C) 2022 Renesas Electronics Corp.
6 */
7
8 /*
9 * (A) CPU0 <-----> ak4613
10 * (B) CPU1 -----> HDMI
11 *
12 * (A) aplay -D plughw:0,0 xxx.wav
13 * (B) aplay -D plughw:0,1 xxx.wav
14 *
15 * (A) arecord -D plughw:0,0 xxx.wav
16 */
17
18 / {
19 sound_card: sound {
20 compatible = "audio-graph-card";
21 label = "snd-ulcb";
22
23 dais = <&snd_ulcb1 /* (A) CPU0 <-> ak4613 */
24 &snd_ulcb2 /* (B) CPU1 -> HDMI */
25 >;
26 };
27 };
28
29 &ak4613 {
30 #sound-dai-cells = <0>;
31
32 port {
33 /*
34 * (A) CPU0 <-> ak4613
35 */
36 ak4613_endpoint: endpoint {
37 remote-endpoint = <&rsnd_for_ak4613>;
38 };
39 };
40 };
41
42 &hdmi0 {
43 ports {
44 port@2 {
45 /*
46 * (B) CPU1 -> HDMI
47 */
48 dw_hdmi0_snd_in: endpoint {
49 remote-endpoint = <&rsnd_for_hdmi>;
50 };
51 };
52 };
53 };
54
55 &rcar_sound {
56 #address-cells = <1>;
57 #size-cells = <0>;
58
59 ports@0 {
60 #address-cells = <1>;
61 #size-cells = <0>;
62 reg = <0>;
63
64 snd_ulcb1: port@0 {
65 /*
66 * (A) CPU0 <-> ak4613
67 */
68 reg = <0>;
69 rsnd_for_ak4613: endpoint {
70 remote-endpoint = <&ak4613_endpoint>;
71 bitclock-master;
72 frame-master;
73 playback = <&ssi0>, <&src0>, <&dvc0>;
74 capture = <&ssi1>, <&src1>, <&dvc1>;
75 };
76 };
77 snd_ulcb2: port@1 {
78 /*
79 * (B) CPU1 -> HDMI
80 */
81 reg = <1>;
82 rsnd_for_hdmi: endpoint {
83 remote-endpoint = <&dw_hdmi0_snd_in>;
84 bitclock-master;
85 frame-master;
86 playback = <&ssi2>;
87 };
88 };
89 };
90 };
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