SoC Audio support for Nokia RX-51

modulename: snd-soc-rx51.ko

configname: CONFIG_SND_OMAP_SOC_RX51

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>GPIO Support
└─>SoC Audio support for Nokia RX-51
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
Say Y if you want to add support for SoC audio on Nokia RX-51
hardware. This is also known as Nokia N900 product.

source code:
sound/soc//omap/