The problem is the device is recognised by RPi and lists correctly from dmesg
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usb 1-1.2.3: new full speed USB device number 5 using dwc_otg
usb 1-1.2.3: New USB device found, idVendor=0403, idProduct=6001
usb 1-1.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1.2.3: Product: USB <-> Serial
usb 1-1.2.3: Manufacturer: FTDI
usbcore: registered new interface driver usbserial
USB Serial support registered for generic
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial Driver core
USB Serial support registered for FTDI USB Serial Device
ftdi_sio 1-1.2.3:1.0: FTDI USB Serial Device converter detected
usb 1-1.2.3: Detected FT232BM
usb 1-1.2.3: Number of endpoints 2
usb 1-1.2.3: Endpoint 1 MaxPacketSize 64
usb 1-1.2.3: Endpoint 2 MaxPacketSize 64
usb 1-1.2.3: Setting MaxPacketSize 64
usb 1-1.2.3: FTDI USB Serial Device converter now attached to ttyUSB0
usbcore: registered new interface driver ftdi_sio
ftdi_sio: v1.6.0:USB FTDI Serial Converters Driver
I do not know what the problem is, the FTDI driver has been part of the kernel for some time, the avenue I am pursuing now is that the driver is not ARM compatible, the FTDI web site doesn't list an ARM linux driver (cant say if that's even relevant).
There is this http://www.ftdichip.com/Support/Documen ... ndroid.pdf regarding cross compiling to ARM (for Android).
So my train of thought is that the current driver is not ARM compatible and requires compiling for ARM, with all that entails and the pitfalls associated.
However I may be barking up completely the wrong tree so any more experienced kernel/driver peeps with a thought?