TI TWL4030/TWL5030/TPS695x0 PMIC

modulename: twl4030-regulator.ko

and/or

twl-regulator.ko

configname: CONFIG_REGULATOR_TWL4030

Linux Kernel Configuration
└─>Device Drivers
└─>Voltage and Current Regulator Support
└─>TI TWL4030/TWL5030/TPS695x0 PMIC
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
This driver supports the voltage regulators provided by
this family of companion chips.

source code:
drivers/regulator/twl4030-regulator.c

is selected by
CONFIG_TWL4030_USB