Messages in this thread | | | From | Mychaela Falconia <> | Date | Mon, 30 Nov 2020 15:36:09 -0800 | Subject | Re: [PATCH 1/5] tty: add port flag to suppress ready signalling on open |
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> Add a NORDY port flag to suppress raising the modem-control lines on > open to signal DTE readiness. > > This can be used to implement a NORDY termios control flag to complement > HUPCL, which controls lowering of the modem-control lines on final > close. > > Initially drivers can export the flag through sysfs, which also allows > control over the lines on first open. > > This can be use to prevent undesirable side-effects on open for > applications where the DTR and RTS lines are used for non-standard > purposes such as generating power-on and reset pulses. > > Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Mychaela N. Falconia <falcon@freecalypso.org>
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