Compaq ASIC3

modulename: asic3.ko

configname: CONFIG_MFD_ASIC3

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>GPIO Support
└─>Compaq ASIC3
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
This driver supports the ASIC3 multifunction chip found on many
PDAs (mainly iPAQ and HTC based ones)

source code: