Hi Felipe, I am using 3.14.52 version from NXP codeline. I haven't tried the latest codeline Best Regards, Leonardo On Wed, Mar 20, 2019 at 4:15 PM Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> wrote: > > > Hi Leonardo, > > "Leonardo, Sionzon" <lsionzon@xxxxxxxxxxx> writes: > > I am Leonardo from Adtec Corporation Japan. > > > > I'm new to USB serial drivers and I have some few questions. > > A bit of background of what I intend to do, we're trying to disable the USB > > port by controlling the USB VBUS via GPIO. For usb storage devices, the > > device is removed and references to /dev/ is removed. For FTDI usb serial > > device, there is still a reference to /dev/ttyUSB . Is this a bug or by > > design? > > What kernel version are you using on the system in question? Have you > tried the latest release (v5.0)? > > Best regards > > -- > balbi