[PATCH 0/2][SRU][F] USB: serial: pl2303: add support for PL2303HXN

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/1948377

[Impact]
PL2303HXN is not supported by 5.4 kernel.
5.5 kernel starts to support it. so only SRU for focal 5.4 kernel.

[Fix]
Clean cherry-pick upstream commits.
Add support for PL2303HXN.

[Test]
Verified on hardware, use minicom to test serial port, it works fine.

[Where problems could occur]
It may break the pl2303 ttyUSBx.

Charles Yeh (1):
  USB: serial: pl2303: add support for PL2303HXN

Johan Hovold (1):
  USB: serial: pl2303: fix line-speed handling on newer chips

 drivers/usb/serial/pl2303.c | 132 +++++++++++++++++++++++++++++-------
 drivers/usb/serial/pl2303.h |   6 ++
 2 files changed, 114 insertions(+), 24 deletions(-)

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2.30.2