tree b6ba598e720c81ca45c6788080219c871e06321c
parent e917ba01d69ad705a4cd6a6c77538f55d84f5907
author Frank Schäfer <fschaefer.oss@googlemail.com> 1375809987 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1376347420 -0700

usb: pl2303: increase the allowed baud rate range for the divisor based encoding method

Reinhard Max has done some tests with a PL2303HX (rev A) and a logic
analyzer and it seems, that although the PL2303HX is specified for baud
rates from 75 to 6M baud, the full divisor range can be used with the
divisor based baud rate encoding method. This corresponds to baud rates
from 46 to 24M baud.
Baud rates down to 46 baud (max. divisor) have been confirmed to work
even under heavy/permanent load, so remove the lower limit.
Baud rates up to 24M baud should really be tested carefully in "real
life" scenarios before removing the upper limit completely.
Anyway, the Windows driver allows maximum baud rates of 110% of the
specified limit, so for now, increase the upper limit to this value.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Reinhard Max <max@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>