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Subject: Re: what serial driver restructure is planned?
To: ncw@axis.demon.co.uk (Nick Craig-Wood)
Date: Mon, 11 Feb 2002 22:01:15 +0000 (GMT)
Cc: linux@arm.linux.org.uk (Russell King - ARM Linux),
        linux-kernel@vger.kernel.org
In-Reply-To: <20020211163059.A22996@axis.demon.co.uk> from "Nick Craig-Wood" at Feb 11, 2002 04:30:59 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> Could we also have an interface to serial devices which bypass the tty
> layer?  Ie a /dev/ttyraw* which just speaks to the serial port without
> going through the labyrinthine tty layers?

You've got one

> 9 times out of 10 when I reach for /dev/ttyS* that is all I want and
> the tty layer is just wasteful and gets in the way of a conceptually
> very simple device.

The only bits of the tty layer being used in raw data passing is the same
buffer management logic you would need anyway. In short - the perceived
waste is simply not there
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