From mboxrd@z Thu Jan 1 00:00:00 1970 From: Petr =?iso-8859-2?Q?=A9tetiar?= Subject: Re: [PATCH v2 0/6] serial: imx: handshaking fixes and improvments Date: Wed, 13 Apr 2016 11:13:36 +0200 Message-ID: <20160413091336.GH26941@ibawizard.net> References: <1458825865-7434-1-git-send-email-u.kleine-koenig@pengutronix.de> <20160411160128.GD26941@ibawizard.net> <20160412074622.GQ10108@pengutronix.de> <20160412094846.GF26941@ibawizard.net> <20160412105856.GR10108@pengutronix.de> <20160412121759.GG26941@ibawizard.net> <20160412173032.GS10108@pengutronix.de> Reply-To: Petr =?iso-8859-2?Q?=A9tetiar?= Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: <20160412173032.GS10108@pengutronix.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Uwe =?iso-8859-2?Q?Kleine-K=F6nig?= Cc: Martin Fuzzey , Baruch Siach , linux-serial@vger.kernel.org, Greg Kroah-Hartman , kernel@pengutronix.de, Petr =?iso-8859-2?Q?=A9tetiar?= , linux-arm-kernel@lists.infradead.org List-Id: linux-serial@vger.kernel.org Uwe Kleine-K=F6nig [2016-04-12 19:30:32]: > On Tue, Apr 12, 2016 at 02:17:59PM +0200, Petr =A9tetiar wrote: > > Uwe Kleine-K=F6nig [2016-04-12 12:58:5= 6]: > > = > > > 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