Should all known devices be added to usbdevs?

[Yuri]

I see that many storage and network devices aren't in usbdevs.
graphics/libgphoto2 package actually has more complete list. But it 
looks like they only process PTP/MTP storage interfaces.
Should we add to usbdevs missing devices from the list in 
graphics/libgphoto2?

For ex. I am looking at smartphone, it has MTP USB storage interface 
recognized by gphoto2, but FreeBSD also recognizes the umodem device, 
and this smartphone isn't in the list.

Yuri