Crossplatform Qt Module for USB programming

It would be great if Qt will support USB Programming. IMO, Qt lacks some subclass of QIODevice, for example QUsbDevice, and provide the same interface for reading and writing(if it is possible, of course, ) and something like QUsbManager - which will emit signals on adding or removing devices. Is it possible in future versions, and if YES, is it possible provide backward compatibility to compile that module with older versions of Qt (Qt 5.X).