From mboxrd@z Thu Jan  1 00:00:00 1970
From: Grant Edwards <grant.b.edwards@gmail.com>
Subject: Re: Setting PL2303 baud rate
Date: Mon, 6 May 2013 20:42:01 +0000 (UTC)
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On 2013-05-06, Fernando Di Nucci <f.dinucci@alice.it> wrote:
> I have a PL2303HX adapter and I need to set up its baud rate to 1228800 
> or 2457600
>
> (openwrt, linux kernel 3.3.8, coreutils 8.16 and ubuntu quantal 
> 3.5.0-28, same coreutils).
>
> I tried stty -F /dev/ttyUSB0 baudrate
>
> Well, when baudrate is 921600 or 3000000 everything is fine, but when I 
> try 1228800 or 2457600 stty complaints:
> stty: invalid argument '2457600'.
>
> I searched stty source and added:
>
> #ifdef B1228800
>    {"1228800", B1228800, 1228800},
> #endif
> #ifdef B2457600
>    {"2457600", B2457600, 2457600},
> #endif
>
> and compiled but no luck. I don't know where else those values need also 
> to be modified.
>
> Can you please point me to the right direction?
>
> Or there is another way to set pl2303 baud rate passing some
> information on the command line of kernel module?
>

I would _guess_ that the PL2303 driver is modern enough that it
supports termios interface that allows application code to specify
arbitrary baud rates -- so you could try that:

http://www.gossamer-threads.com/lists/python/python/1019389?do=post_view_threaded

-- 
Grant Edwards               grant.b.edwards        Yow! Should I get locked
                                  at               in the PRINCICAL'S
                              gmail.com            OFFICE today -- or have
                                                   a VASECTOMY??