CONFIG_CS89x0 (not configurable)

modulename: cs89x0.ko

configname: CONFIG_CS89x0

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>CS89x0
In linux kernel since version 2.6.12  
source code:
drivers/net/ethernet/cirrus/cs89x0.c