Active-semi ACT8945A

modulename: act8945a.ko

configname: CONFIG_MFD_ACT8945A

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>Device Tree and Open Firmware support
└─>Active-semi ACT8945A
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Support for the ACT8945A PMIC from Active-semi. This device
features three step-down DC/DC converters and four low-dropout
linear regulators, along with a complete ActivePath battery
charger.

source code:
drivers/mfd//act8945a.c