From: Claudio Scordino <claudio@evidence.eu.com>
To: Wolfram Sang <w.sang@pengutronix.de>
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
Alan Cox <alan@linux.intel.com>,
Juergen Beisert <jbe@pengutronix.de>,
Matthias Fuchs <mfuchs@ma-fu.de>
Subject: Re: [PATCH 5/8] serial: 8250: reject delaying RTS with RS485
Date: Thu, 17 Nov 2011 10:43:11 +0100 [thread overview]
Message-ID: <4EC4D72F.8030702@evidence.eu.com> (raw)
In-Reply-To: <1321460685-15753-6-git-send-email-w.sang@pengutronix.de>
Hi Wolfram,
Il 16/11/2011 17:24, Wolfram Sang ha scritto:
> There might be chips capable of doing this, but for now nothing is implemented,
> so reject usage of this feature.
The delay must not necessarily be done by hardware. The drivers/tty/serial/crisv10.c
driver, for example, delays through a msleep.
I don't know if having a software delay in this driver can make sense in some particular
circumstance.
Best regards,
Claudio
next prev parent reply other threads:[~2011-11-17 9:43 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-16 16:24 [PATCH 0/8] serial: 8250: support hw-based RS485 direction control (finally!) Wolfram Sang
2011-11-16 16:24 ` [PATCH 1/8] serial: 8250: replace hardcoded 0xbf with #define Wolfram Sang
2011-11-16 16:24 ` [PATCH 2/8] serial: 8250: Add ioctl to enable auto rs485 mode with some Exar UARTs Wolfram Sang
2011-11-17 9:40 ` Claudio Scordino
2011-11-17 10:09 ` Wolfram Sang
2011-11-16 16:24 ` [PATCH 3/8] serial: 8250: save rs485_flags per instance Wolfram Sang
2011-11-16 16:24 ` [PATCH 4/8] serial: 8250: add RX_DURING_TX capability to RS485 mode Wolfram Sang
2011-11-16 16:24 ` [PATCH 5/8] serial: 8250: reject delaying RTS with RS485 Wolfram Sang
2011-11-17 9:43 ` Claudio Scordino [this message]
2011-11-17 10:14 ` Wolfram Sang
2011-11-16 16:24 ` [PATCH 6/8] serial: 8250: update rs485 flags with polarity settings Wolfram Sang
2011-11-16 16:24 ` [PATCH 7/8] serial: 8250: add Exar 16V2750 support Wolfram Sang
2011-11-16 16:24 ` [PATCH 8/8] serial: 8250: fix comment about accessing EMSR Wolfram Sang
2011-11-23 15:03 ` [PATCH 0/8] serial: 8250: support hw-based RS485 direction control (finally!) Wolfram Sang
2011-11-24 16:05 ` Claudio Scordino
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