Ricoh RN5T567/618 voltage regulators

modulename: rn5t618-regulator.ko

configname: CONFIG_REGULATOR_RN5T618

Linux Kernel Configuration
└─>Device Drivers
└─>Voltage and Current Regulator Support
└─>Ricoh RN5T567/618 voltage regulators
In linux kernel since version 3.18 (release Date: 2014-12-07)  
Say y here to support the regulators found on Ricoh RN5T567,
RN5T618 or RC5T619 PMIC.

source code:
drivers/regulator/rn5t618-regulator.c