On Do, 2018-08-16 at 01:28 -0700, Patong Yang wrote: > Features not supported by the cdc-acm driver are > enabling/disabling flow control, enabling/disabling RS-485 mode, > GPIOs and GPIO modes, etc. Support for these features had to be added in this > new driver. Hi, I am afraid RS-485 in cdc-acm is a no-go. I don't like the duplication, but it is the lesser evil. We might want to include more stuff in the new driver, so we duplicate only compiled code. Regards Oliver