[PATCH v2 0/6] serial: imx: handshaking fixes and improvments

[Petr Štetiar]

Uwe Kleine-König <u.kleine-koenig at pengutronix.de> [2016-04-12 19:30:32]:

> On Tue, Apr 12, 2016 at 02:17:59PM +0200, Petr Štetiar wrote:
> > Uwe Kleine-König <u.kleine-koenig at pengutronix.de> [2016-04-12 12:58:56]:
> > 
> > > ok, so UFCR_DCEDTE is set and UCR3_DSR controls the DTR output as
> > > intended. What is connected to the respective pin?
> > > MX6QDL_PAD_EIM_D25__UART1_DSR_B I think is the one.
> > 
> > It's routed out to Apalis SoM pin 120, which is then connected via 22R
> > resistor and through SN65C3243DBR RS-232 line driver to header which I use as
> > debug/serial console.
> 
> Then I guess the problem is that the rs232-partner asserts the imx6's
> DSR in reply to the imx6 asserting DTR?

Yes, that's correct.

-- ynezz