This patch implements a USB serial port driver for the Winchiphead
CH341 USB-RS232 Converter. This chip also implements an IEEE 1284
parallel port, I2C and SPI, but that is not supported by the driver.
Signed-off-by: NFrank A Kingswood <frank@kingswood-consulting.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>