X-Powers AC100

modulename: ac100.ko

configname: CONFIG_MFD_AC100

Linux Kernel Configuration
└─>Device Drivers
└─>Multifunction device drivers
└─>X-Powers AC100
In linux kernel since version 4.1 (release Date: 2015-06-21)  
If you say Y here you get support for the X-Powers AC100 audio codec
IC.
This driver include only the core APIs. You have to select individual
components like codecs or RTC under the corresponding menus.

source code: