I am working with a Versalogic EBX-11 board (AMD LX800). The manual indicates that the hardware for com3 and com4 are 
capable of running at 460800 baud. Can devc_ser8250 be configured to handle such a high baud rate?

My sense is that the baud rate of the 16550 is constrained by the input clock frequency, and I don't know if there is 
any way to change that input clock frequency. The documentation for devc-ser8250 indicates that the -c option specifies 
a custom clock rate, but it is unclear whether that is merely informing the driver what the input clock is or asking the
 driver to adjust the input clock rate. I suspect it is the former. If so, is there any way to actually increase the 
input clock rate?