I'm using a raspberry pi to control a LED matrix display with a Prolific USB to serial cable (067b 2303). Using the default raspian image it works perfectly, however with a custom buildroot image (using rpi-buildroot) I'm unable to configure or use it.Here are my steps thus far:Linux recognizes the device but does not automatically load any drivers or attach it to /dev/ttyUSBx, so I use:modprobe ftdi_sioWhich yields:usbcore: registered new interface driver usbserialusbcore: registered new interface driver usbserial_genericusbserial: USB Serial support registered for genericusbcore: registered new interface driver ftdi_siousbserial: USB Serial support registered for FTDI USB Serial DeviceI don't see anything at /dev/ttyUSB* so I echo to new_id with prod and vendor IDs:echo 067b 2303 > /sys/bus/usb-serial/drivers/ftdi_sio/new_idWhich yields:ftdi_sio 1-1.2:1.0: FTDI USB Serial Device converter detected usb 1-1.2: Detected FIBU232AM ftdi_sio ttyUSBO: Unable to read latency timer: -32 ftdi_sio ttyUSBO: Unable to write latency timer: -32 usb 1-1.2: FTDI USB Serial Device converter now attached to ttyUSB0When I try to change baud rate with:stty -F /dev/ttyUSB0 115200Which fails with:ftdi_sio ttyUSBO: ftdi_set_termios FAILED to set databits/stopbits/parity ftdi_sio ttyUSBO: ftdi_set_termios urb failed to set baudrate ftdi_sio ttyUSBO: urb failed to clear flow control ftdi_sio ttyUSBO: failed to get modem status: -32ftdi_sio ttyUSBO: ftdi_set_termios urb failed to set baudrateftdi_sio ttyUSBO: urb failed to clear flow controlftdi_sio ttyUSBO: failed to get modem status: -32ftdi_sio ttyUSBO: error from flowcontrol urb  I'm new to the cross-compilation so might be missing something obvious in my build config, but I found nothing for usb serial to configure. Any insight would be greatly appreciated, thanks!
Usb serial cable (prolific) not working with ftdi_sio driver on rpi-buildroot image
usb;raspberry pi;serial port;buildroot