SoC Audio for the Samsung S3CXXXX chips

modulename: dev-audio.ko

and/or

snd-soc-s3c24xx.ko

configname: CONFIG_SND_S3C24XX_SOC

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>SoC Audio for the Samsung S3CXXXX chips
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Say Y or M if you want to add support for codecs attached to
the S3C24XX AC97 or I2S interfaces. You will also need to
select the audio interfaces to support below.

source code:
arch/arm/plat-s3c64xx/dev-audio.c