linux-kernel - Re: [PATCH 5/8] serial: 8250: reject delaying RTS with RS485

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Date:	Thu, 17 Nov 2011 10:43:11 +0100
From:	Claudio Scordino <claudio@...dence.eu.com>
To:	Wolfram Sang <w.sang@...gutronix.de>
CC:	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alan Cox <alan@...ux.intel.com>,
	Juergen Beisert <jbe@...gutronix.de>,
	Matthias Fuchs <mfuchs@...fu.de>
Subject: Re: [PATCH 5/8] serial: 8250: reject delaying RTS with RS485

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
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