Merge remote-tracking branch 'lsk/v3.10/topic/genpd' into linux-linaro-lsk
[firefly-linux-kernel-4.4.55.git] / sound / soc / codecs / spdif_receiver.c
1 /*
2  * ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
3  *
4  * Based on ALSA SoC SPDIF DIT driver
5  *
6  *  This driver is used by controllers which can operate in DIR (SPDI/F) where
7  *  no codec is needed.  This file provides stub codec that can be used
8  *  in these configurations. SPEAr SPDIF IN Audio controller uses this driver.
9  *
10  * Author:      Vipin Kumar,  <vipin.kumar@st.com>
11  * Copyright:   (C) 2012  ST Microelectronics
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License version 2 as
15  * published by the Free Software Foundation.
16  */
17
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/slab.h>
21 #include <sound/soc.h>
22 #include <sound/pcm.h>
23 #include <sound/initval.h>
24
25 #define STUB_RATES      SNDRV_PCM_RATE_8000_192000
26 #define STUB_FORMATS    (SNDRV_PCM_FMTBIT_S16_LE | \
27                         SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
28
29 static struct snd_soc_codec_driver soc_codec_spdif_dir;
30
31 static struct snd_soc_dai_driver dir_stub_dai = {
32         .name           = "dir-hifi",
33         .capture        = {
34                 .stream_name    = "Capture",
35                 .channels_min   = 1,
36                 .channels_max   = 384,
37                 .rates          = STUB_RATES,
38                 .formats        = STUB_FORMATS,
39         },
40 };
41
42 static int spdif_dir_probe(struct platform_device *pdev)
43 {
44         return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dir,
45                         &dir_stub_dai, 1);
46 }
47
48 static int spdif_dir_remove(struct platform_device *pdev)
49 {
50         snd_soc_unregister_codec(&pdev->dev);
51         return 0;
52 }
53
54 static struct platform_driver spdif_dir_driver = {
55         .probe          = spdif_dir_probe,
56         .remove         = spdif_dir_remove,
57         .driver         = {
58                 .name   = "spdif-dir",
59                 .owner  = THIS_MODULE,
60         },
61 };
62
63 module_platform_driver(spdif_dir_driver);
64
65 MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
66 MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
67 MODULE_LICENSE("GPL");