Diff between Angstrom >= 2013-06-20 regarding LCD7 cape support


as of version 2013-06-20 Angstrom supports the LCD7 cape attached to a
Beaglebone Black.

Instead of Angstrom I want to use Gentoo.

What do I have to change there to get my LCD7 cape supprted?
What kernel version do I need at least?

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