[  664.473700] usb 2-1.1: new full-speed USB device number 6 using ehci_hcd
[  664.617709] usbcore: registered new interface driver usbserial
[  664.617719] USB Serial support registered for generic
[  664.617744] usbcore: registered new interface driver usbserial_generic
[  664.617745] usbserial: USB Serial Driver core
[  664.625385] USB Serial support registered for ch341-uart
[  664.625396] ch341 2-1.1:1.0: ch341-uart converter detected
[  664.627562] usb 2-1.1: ch341-uart converter now attached to ttyUSB0