Launch putty from Linux cli with serial parameters

I can launch a serial session from the Linux command line with:

putty -serial /dev/ttyS0

But I can’t find an option to set the serial speed. Google AI tells me that this should work:

putty -serial /dev/ttyS0 -speed 115200

But it reports that ‘-speed’ is an unrecognized option. Maybe that works for Windows users. Can I do this in Linux?