1config USB_SERIAL_QUATECH_USB2 2 tristate "USB Quatech xSU2-[14]00 USB Serial Driver" 3 depends on USB_SERIAL 4 help 5 Say Y here if you want to use a Quatech USB2.0 to serial adaptor. This 6 driver supports the SSU2-100, DSU2-100, DSU2-400, QSU2-100, QSU2-400, 7 ESU2-400 and ESU2-100 USB2.0 to RS232 / 485 / 422 serial adaptors. 8 9 Some hardware has an incorrect product string and announces itself as 10 ESU-100 (which uses the serqt driver) even though it is an ESU2-100. 11 Check the label on the bottom of your device. 12 13 To compile this driver as a module, choose M here: the module will be 14 called quatech_usb2 . 15 16