[PATCH 0/4] ch341: Add support for HL340 devices

[Michael Hanselmann <public@hansmi.ch>]

A subset of CH341 devices does not support all features, namely the
prescaler is limited to a reduced precision and there is no support for
sending a RS232 break condition.

These devices can usually be identified by an imprint of "340" on the
turquoise-colored plug. They're also sometimes called "HL340", hence the
terminology in this series and driver.

This series adds detection of these devices, adjusts the
divisor/prescaler setup and implements a simulated break condition.

Michael Hanselmann (4):
  ch341: Name more registers
  ch341: Detect HL340 variant
  ch341: Limit prescaler on HL340 variant
  ch341: Simulate break condition on HL340 variant

 drivers/usb/serial/ch341.c | 196 +++++++++++++++++++++++++++++++++----
 1 file changed, 176 insertions(+), 20 deletions(-)

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2.20.1