SoC Audio support for Tegra boards using a WM8903 codec

modulename: snd-soc-tegra-wm8903.ko

configname: CONFIG_SND_SOC_TEGRA_WM8903

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>I2C support
└─>GPIO Support
└─>SoC Audio support for Tegra boards using a WM8903 codec
In linux kernel since version 3 (release Date: 2011-07-21)  
Say Y or M here if you want to add support for SoC audio on Tegra
boards using the WM8093 codec. Currently, the supported boards are
Harmony, Ventana, Seaboard, Kaen, and Aebl.

source code:
sound/soc//tegra/