[CentOS] device driver useage

Under Centos 5.X, how can I determine with 100% certainty what driver is
associated with a given device other than referencing dmesg?  For example,
what tool can I use to tell for sure what driver is attached to my eth0
device?  


I have searched the web, but could not find anything that answered my
question.

Geoff Galitz
Blankenheim NRW, Deutschland
http://www.galitz.org