On Thu, May 02, 2024 at 11:07:28AM +0100, Mans Rullgard wrote: > Use tty_port_register_device_serdev() so that usb-serial devices > can be used as serdev controllers. I'm afraid it's not that easy. The reason serdev is not enabled for usb-serial is that there's currently no support for handling hotplug in serdev. The device can go away from under you at any time and then you'd crash the kernel. Johan