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

Wed Apr 13 04:16:46 PDT 2016

On Wed, Apr 13, 2016 at 11:13:36AM +0200, Petr Štetiar wrote:
> 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.

OK, that fits nicely in my picture. So we only have to wait until Greg
happily picks up the fixes (i.e. patches 1 up to 4).

Best regards
Uwe

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