[gentoo-user] Identifying missing modules...

Hi,

when doing as root

    lspci -vk

I get all pci devices and "bus inhabitants" listed.
Additionally there are often two lines added to each
device saying similiar things like:

        Kernel driver in use: >XYZ>
        Kernel modules: <XYZ>

and there other devices do not have similiar entries.

My question is: How can I distinguish devices/entities, 
which do not need any driver to work and those, which
need a driver but in the current setup the driver wasn't
compiled in/compiled as module?

Thank you very much in advance for any help!
Best regards,
mcc