Where to find the information how to write a state of the art USB driver?

[Philipp Hortmann]

Hi all,

template usb-skeleton.c is working but outdated, documentation is 
helpful but years old and checkpatch.pl is giving hints to deprecated 
functions. This information is helpful but it does not show the way how 
to write a state of the art USB driver. Where to find this information? 
In the USB mailing list? By checking in git on which files most 
maintenance activities were done?

Thanks for your support.

Bye Philipp