#1 Add driver specific behaviour with multiple devices...

[Anonymous]

I suggest you to add driver's intelligent behaviour -
when new serial converter is found on the bus, the
driver must look it's serial number and then look into
specific configuration file where to attach this new
device - for example /dev/ttyUSB4, instead of attaching
it to the first free /dev/ inode. This is very convenient
when working with many devices, especially when
their /dev/ inode depends on the sequence of devices'
insertion. 10x in advance.

[Nobody/Anonymous]

udev/libsysfs might be able to solve this problem without needing a config file for a driver.