USB: serial: cp210x: fix RTS handling

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Clearing TIOCM_RTS should always deassert RTS and setting the same bit
should enable auto-RTS if hardware flow control is enabled.

This allows user space to throttle input directly at the source also
when hardware-assisted flow control is enabled and makes dtr_rts()
always deassert both lines during close (when HUPCL is set).

Signed-off-by: Johan Hovold <johan@kernel.org>

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Johan Hovold 2021-01-25 14:48:16 +01:00

parent 6b667274f4

commit cf00ead0bd

1 changed files with 40 additions and 7 deletions

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drivers/usb/serial/cp210x.c

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