Wolfson Microelectronics WM8994 CODEC

modulename: wm8994-regulator.ko

configname: CONFIG_REGULATOR_WM8994

Linux Kernel Configuration
└─>Device Drivers
└─>Voltage and Current Regulator Support
└─>Wolfson Microelectronics WM8994 CODEC
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
This driver provides support for the voltage regulators on the
WM8994 CODEC.

source code:
drivers/regulator/wm8994-regulator.c