From: Clemens Gruber <clemens.gruber@pqgruber.com>
To: Fabio Estevam <festevam@gmail.com>
Cc: linux-serial@vger.kernel.org,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Sascha Hauer" <s.hauer@pengutronix.de>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Nandor Han" <nandor.han@ge.com>,
"Lucas Stach" <l.stach@pengutronix.de>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: imx: RS-485 problems during TX, maybe DMA related
Date: Sat, 7 Jan 2017 21:59:30 +0100 [thread overview]
Message-ID: <20170107205930.GA12367@archie.localdomain> (raw)
In-Reply-To: <CAOMZO5CY3ys6moE133LwSKcS4egv56JdmhPMRG0TmAnfD+ZBAw@mail.gmail.com>
On Sat, Jan 07, 2017 at 02:48:03PM -0200, Fabio Estevam wrote:
> On Sat, Jan 7, 2017 at 1:34 PM, Clemens Gruber
> <clemens.gruber@pqgruber.com> wrote:
> > Hi Fabio,
> >
> > On Sat, Jan 07, 2017 at 12:57:10PM -0200, Fabio Estevam wrote:
> >> The MX6QDL_PAD_CSI0_DAT16__UART4_CTS_B option is only valid in dte mode.
> >
> > Ah, the input select is limited in that way, I see.
> >
> > You wrote that you tried rts-gpios.
> > What about setting cts-gpios to gpio6 2 in the DT?
> >
> > Or can you remux RX and TX to be switched to work in dte mode?
>
> I managed to get RS485 in half-duplex working with rts-gios. Will send
> a patch shortly.
Great!
Did you observe the same effect I described, with the doubling of
characters in the front and the leftovers from previous transmissions at
the end?
Thanks,
Clemens
next prev parent reply other threads:[~2017-01-07 20:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-04 16:00 imx: RS-485 problems during TX, maybe DMA related Clemens Gruber
2017-01-06 21:22 ` Fabio Estevam
2017-01-06 22:50 ` Clemens Gruber
2017-01-07 0:31 ` Fabio Estevam
2017-01-07 13:45 ` Clemens Gruber
2017-01-07 14:57 ` Fabio Estevam
2017-01-07 15:34 ` Clemens Gruber
2017-01-07 16:48 ` Fabio Estevam
2017-01-07 20:59 ` Clemens Gruber [this message]
2017-01-07 21:43 ` Fabio Estevam
2017-01-07 23:06 ` Clemens Gruber
2017-01-08 2:30 ` Fabio Estevam
2017-01-08 18:06 ` Clemens Gruber
2017-01-08 21:46 ` Fabio Estevam
2017-01-11 0:33 ` Clemens Gruber
2017-01-11 11:51 ` Fabio Estevam
2017-01-08 15:12 ` Fabio Estevam
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