Wolfson Microelectronics WM831x PMIC regulators

modulename: wm831x-dcdc.ko

and/or

wm831x-isink.ko

and/or

wm831x-ldo.ko

configname: CONFIG_REGULATOR_WM831X

Linux Kernel Configuration
└─>Device Drivers
└─>Voltage and Current Regulator Support
└─>Wolfson Microelectronics WM831x PMIC regulators
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
Support the voltage and current regulators of the WM831x series
of PMIC devices.

source code:
drivers/regulator/wm831x-dcdc.c