Wolfson Microelectronics WM8994

modulename: wm8994.ko

and/or

wm8994-core.ko

configname: CONFIG_MFD_WM8994

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>I2C support
└─>Wolfson Microelectronics WM8994
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
The WM8994 is a highly integrated hi-fi CODEC designed for
smartphone applicatiosn. As well as audio functionality it
has on board GPIO and regulator functionality which is
supported via the relevant subsystems. This driver provides
core support for the WM8994, in order to use the actual
functionaltiy of the device other drivers must be enabled.

source code: