CONFIG_REGMAP_SOUNDWIRE (not configurable)

modulename: regmap-sdw.ko

configname: CONFIG_REGMAP_SOUNDWIRE

Linux Kernel Configuration
└─>Device Drivers
└─>Generic Driver Options
└─>REGMAP_SOUNDWIRE
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/base//regmap/regmap-sdw.c