ST-Ericsson AB8500 Mixed Signal Power Management chip

modulename: ab8500-core.ko

configname: CONFIG_AB8500_CORE

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>SPI support
└─>ST-Ericsson AB8500 Mixed Signal Power Management chip
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
Select this option to enable access to AB8500 power management
chip. This connects to U8500 on the SSP/SPI bus and exports
read/write functions for the devices to get access to this chip.
This chip embeds various other multimedia funtionalities as well.

source code: