I've finally got my Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter to work after using Louis-Dominique Dubeau's script. You can find it in the deb package available at the website I've linked to above. Is there a possibility of adding this fix to Gentoo? Maybe an ebuild, maybe other clever solution? It's a crucial issue for owners of R5C822, as it does not work unless you use this script.
Steps to Reproduce:
# lspci | grep -i ricoh
0e:06.0 FireWire (IEEE 1394): Ricoh Co Ltd Unknown device 0832 (rev 05)
0e:06.1 Generic system peripheral : Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
0e:06.2 System peripheral: Ricoh Co Ltd Unknown device 0843 (rev 12)
0e:06.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev ff)
*** This bug has been marked as a duplicate of bug 185581 ***