CONFIG_MFD_TPS65912 (not configurable)

modulename: tps65912.ko

and/or

tps65912-core.ko

configname: CONFIG_MFD_TPS65912

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>GPIO Support
└─>MFD_TPS65912
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/mfd//