CONFIG_SND_CS4231_LIB (not configurable)

configname: CONFIG_SND_CS4231_LIB

Linux Kernel Configuration
└─>Device Drivers
└─>Sound
└─>Advanced Linux Sound Architecture
└─>ISA devices
└─>SND_CS4231_LIB
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
selects
CONFIG_SND_PCM