The ccid makefile has an option for installing a serial driver for the twin hardware. However, the ebuild does not provide this option.
Created attachment 103738 [details, diff] added ccidtwin use flag to ccid-1.0.1-r1 I have added a ccidtwin use flag and I have attached a patch to the ccid-1.0.1-r1 ebuild, adding a ccidtwin use flag. It works correctly for the x86 (the only architecture on which I tested.
Sorry for the poor proofreading of Comment #1, above, before hitting the commit button.
Added, please check. Thanks!