CONFIG_SND_SOC_WM1250_EV1 (not configurable)

modulename: snd-soc-wm1250-ev1.ko

configname: CONFIG_SND_SOC_WM1250_EV1

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>CODEC drivers
└─>SND_SOC_WM1250_EV1
In linux kernel since version 3 (release Date: 2011-07-21)  
source code:
sound/soc//codecs/