NXP PCF50633

modulename: pcf50633.ko

configname: CONFIG_MFD_PCF50633

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>NXP PCF50633
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
Say yes here if you have NXP PCF50633 chip on your board.
This core driver provides register access and IRQ handling
facilities, and registers devices for the various functions
so that function-specific drivers can bind to them.

source code: