1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
2 /*
3 * Copyright 2022 Toradex
4 */
5
6 #include "imx8mm-verdin-dahlia.dtsi"
7
8 / {
9 sound_card: sound-card {
10 compatible = "simple-audio-card";
11 simple-audio-card,bitclock-master = <&dailink_master>;
12 simple-audio-card,format = "i2s";
13 simple-audio-card,frame-master = <&dailink_master>;
14 simple-audio-card,name = "imx8mm-nau8822";
15 simple-audio-card,routing =
16 "Headphones", "LHP",
17 "Headphones", "RHP",
18 "Speaker", "LSPK",
19 "Speaker", "RSPK",
20 "Line Out", "AUXOUT1",
21 "Line Out", "AUXOUT2",
22 "LAUX", "Line In",
23 "RAUX", "Line In",
24 "LMICP", "Mic In",
25 "RMICP", "Mic In";
26 simple-audio-card,widgets =
27 "Headphones", "Headphones",
28 "Line Out", "Line Out",
29 "Speaker", "Speaker",
30 "Microphone", "Mic In",
31 "Line", "Line In";
32
33 dailink_master: simple-audio-card,codec {
34 clocks = <&clk IMX8MM_CLK_SAI2_ROOT>;
35 sound-dai = <&nau8822_1a>;
36 };
37
38 simple-audio-card,cpu {
39 sound-dai = <&sai2>;
40 };
41 };
42 };
43
44 &gpio_expander_21 {
45 status = "okay";
46 };
47
48 /* Verdin I2C_1 */
49 &i2c4 {
50 /* Audio Codec */
51 nau8822_1a: audio-codec@1a {
52 compatible = "nuvoton,nau8822";
53 reg = <0x1a>;
54 };
55 };
56
57 /* Verdin UART_1, connector X50 through RS485 transceiver */
58 &uart2 {
59 linux,rs485-enabled-at-boot-time;
60 rs485-rts-active-low;
61 rs485-rx-during-tx;
62 };
63
64 /* Limit frequency on dev board due to long traces and bad signal integrity */
65 &usdhc2 {
66 max-frequency = <100000000>;
67 };
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