SoC AC97 Audio for the ADI BF5xx chip

modulename: snd-bf5xx-ac97.ko

configname: CONFIG_SND_BF5XX_AC97

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>SoC AC97 Audio for the ADI BF5xx chip
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
Say Y or M if you want to add support for codecs attached to
the Blackfin SPORT (synchronous serial ports) interface in slot 16
mode (pseudo AC97 interface).
You will also need to select the audio interfaces to support below.

Note:
AC97 codecs which do not implement the slot-16 mode will not function
properly with this driver. This driver is known to work with the
Analog Devices line of AC97 codecs.

source code: