[PATCH 0/4] ch341 cleanup and parity etc support

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This is an attempt to clean-up and resubmit some patches by Grigori
Goronzy a few months back adding support for parity, frame length, and 
2 stop bits to the CH340/1 driver and cleaning up some magic constants.
His original patch series also went on to add RTS/CTS hardware flow
control and some other stuff, but I'm not attempting to resubmit those
patches at this time because they seem to require more work and none of
the hardware I have breaks out the RTS pin.

Note that unlike his original patch series this is only tested on
CH340G, but they're basically just his original tested-on-CH341A patches
with all the magic constant removal moved into the first patch and some
constants renamed, plus a couple of trivial changes per review comments.

Aidan Thornton (4):
  USB: ch341: add register and USB request definitions
  USB: ch341: reinitialize chip on reconfiguration
  USB: ch341: add support for parity, frame length, stop bits
  USB: ch341: add debug output for chip version

 drivers/usb/serial/ch341.c | 112 +++++++++++++++++++++++++++++
+--------------- 1 file changed, 74 insertions(+), 38 deletions(-)

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