SoC Audio support for HP iPAQ hx4700

modulename: snd-soc-hx4700.ko

configname: CONFIG_SND_PXA2XX_SOC_HX4700

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>I2C support
└─>SoC Audio support for HP iPAQ hx4700
In linux kernel since version 3 (release Date: 2011-07-21)  
Say Y if you want to add support for SoC audio on the
HP iPAQ hx4700.

source code:
sound/soc//pxa/