I'm handling a bug report <http://bugs.debian.org/553024> relating to
tg3 using phylib and missing the broadcom module.

There seem to be two general problems here:
1. PHY drivers are not auto-loaded
2. An initramfs builder cannot statically determine that a net device
requires a PHY driver

It seems to me that PHY drivers should have aliases based on MDIO PHY
ids, and phylib should request_module() if no suitable driver is
registered.  This would solve (1) and go some way to solving (2).

Ben.

-- 
Ben Hutchings
The generation of random numbers is too important to be left to chance.
                                                            - Robert Coveyou