On Mon, Mar 04, 2019 at 05:46:54PM +0530, Subhashini Rao Beerisetty wrote: > Hi All, > > > I’ve an UART ports on Xilinx FPGA board and it gets connected to PC > via PCIe bus. I could not find any kernel serial driver which supports > our hardware so I plan to develop a new driver. I see two approaches > to develop an UART driver i.e. either by using tty_register_driver() > or an uart_register_driver(). > > > Regarding my UART module, it has a counter of 16 bits and runs on a > 32Mhz clock. It supports all the standard & non-standard baud’s up to > 4Mbps. What type of UART is it? Odds are it is based on an existing design, no one creates a brand-new UART anymore. Hopefully. If not, what a waste... > If I used struct tty_operations, I noticed that baud rate changing is > done via “.set_termios” API, but this method only supports standard > baud rates. I’d like to know why this API does not support > non-standard baud rates? Why do you think it does not? Anyway, use the uart interface as odds are your uart is already supported. Get the data sheet and start reading :) good luck, greg k-h
