[ALSA] ASoC AC97 device reg bugfix

This patch fixes a bug whereby AC97 bus device data was being clobbered
when AC97 codecs using the generic ac97_codec.c driver were being
registered. Codecs that didn't use the generic driver were unaffected
(e.g. WM9712, WM9713).
Changes:-
 o Add new AC97 codec class for custom (or need bus dev registration)
AC97 codecs.
 o Only register/deregister this custom codec device with the AC97 bus.
The generic AC97 driver already does this for generic codec devices.
This may be related to bug #3038 :-
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3038

Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index b1dc364b8f74..db6edba8ef08 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -22,7 +22,7 @@
 #include <sound/control.h>
 #include <sound/ac97_codec.h>
 
-#define SND_SOC_VERSION "0.13.0"
+#define SND_SOC_VERSION "0.13.1"
 
 /*
  * Convenience kcontrol builders
@@ -83,6 +83,7 @@
 #define SND_SOC_DAI_AC97        0x1
 #define SND_SOC_DAI_I2S         0x2
 #define SND_SOC_DAI_PCM         0x4
+#define SND_SOC_DAI_AC97_BUS    0x8     /* for custom i.e. non ac97_codec.c */
 
 /*
  * DAI hardware audio formats
@@ -278,6 +279,7 @@ struct snd_soc_cpu_ops {
 struct snd_soc_codec_dai {
         char *name;
         int id;
+        unsigned char type;
 
         /* DAI capabilities */
         struct snd_soc_pcm_stream playback;