1. / {
2.         sound: sound {
3.                 compatible = "simple-audio-card";
4.  
5.                 simple-audio-card,name = "Odroid-XU4";
6.                 simple-audio-card,widgets =
7.                         "Headphone", "Headphone Jack";
8.                 simple-audio-card,routing =
9.                         "Headphone Jack", "HPL",
10.                         "Headphone Jack", "HPR";
11.  
12.                 simple-audio-card,format = "i2s";
13.                 simple-audio-card,bitclock-master = <&link0_codec>;
14.                 simple-audio-card,frame-master = <&link0_codec>;
15.  
16.                 simple-audio-card,cpu {
17.                         sound-dai = <&i2s0 0>;
18.                         system-clock-frequency = <19200000>;
19.                 };
20.  
21.                 link0_codec: simple-audio-card,codec {
22.                         sound-dai = <&cs4344>;
23.                         clocks = <&i2s0 CLK_I2S_CDCLK>;
24.                 };
25.         };
26.  
27.         cs4344: cs4344@10 {
28.                 compatible = "cirrus,cs4344";
29.                 clocks = <&i2s0 CLK_I2S_CDCLK>;
30.                 clock-names = "mclk";
31.                 #sound-dai-cells = <0>;
32.                 status = "okay";
33.         };
34.  
35. };
36.  
37.  
38.  
39.  
40. ==============================================
41.  
42. CODEC PART:
43.  
44.  
45. #include <linux/init.h>
46. #include <linux/slab.h>
47. #include <linux/module.h>
48. #include <linux/kernel.h>
49. #include <linux/device.h>
50. #include <sound/core.h>
51. #include <sound/pcm.h>
52. #include <sound/ac97_codec.h>
53. #include <sound/initval.h>
54. #include <sound/soc.h>
55.  
56. #include "cs4344.h"
57.  
58. static const struct snd_soc_dapm_widget cs4344_dapm_widgets[] = {
59.     SND_SOC_DAPM_OUTPUT("HPL"),
60.     SND_SOC_DAPM_OUTPUT("HPR"),
61. };
62.  
63. static const struct snd_soc_dapm_route cs4344_dapm_routes[] = {
64.     { "HPL", NULL, "Playback" },
65.     { "HPR", NULL, "Playback" },
66. };
67.  
68. static struct snd_soc_dai_driver cs4344_dai = {
69.     .name = "cs4344",
70.     .playback = {
71.         .stream_name = "Playback",
72.         .channels_min = 1,
73.         .channels_max = 2,
74.         .rates= SNDRV_PCM_RATE_8000  | SNDRV_PCM_RATE_11025 | \
75.                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
76.                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
77.                 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
78.         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
79.     },
80. };
81.  
82. static struct snd_soc_codec_driver soc_codec_dev_cs4344 = {
83.     .dapm_widgets = cs4344_dapm_widgets,
84.     .num_dapm_widgets = ARRAY_SIZE(cs4344_dapm_widgets),
85.     .dapm_routes = cs4344_dapm_routes,
86.     .num_dapm_routes = ARRAY_SIZE(cs4344_dapm_routes),
87. };
88.  
89. static int cs4344_probe(struct platform_device *pdev){
90.     printk ("****** probe cs4344 ******\n");
91.     return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_cs4344, &cs4344_dai, 1);
92. }
93.  
94. static int cs4344_remove(struct platform_device *pdev){
95.     printk ("****** remove cs4344 ******\n");
96.     snd_soc_unregister_codec(&pdev->dev);
97.     return 0;
98. }
99.  
100. static const struct of_device_id cs4344_of_match[] = {
101.     { .compatible = "cirrus,cs4344", },
102.     { }
103. };
104.  
105. MODULE_DEVICE_TABLE(of, cs4344_of_match);
106.  
107. static struct platform_driver cs4344_codec_driver = {
108.     .driver = {
109.         .name = "cs4344",
110.         .of_match_table = of_match_ptr(cs4344_of_match),
111.     },
112.     .probe = cs4344_probe,
113.     .remove = cs4344_remove,
114. };
115.  
116. module_platform_driver(cs4344_codec_driver);
117.  
118. MODULE_DESCRIPTION("ASoC cs4344 driver");
119. MODULE_AUTHOR("xyz");
120. MODULE_LICENSE("GPL");
121. MODULE_ALIAS("platform:cs4344");
122.  
123.  
124.