linux-kernel - Re: Serial custom speed deprecated?

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Message-ID: <Pine.LNX.4.61.0608281047360.388@chaos.analogic.com>
Date:	Mon, 28 Aug 2006 10:50:45 -0400
From:	"linux-os \(Dick Johnson\)" <linux-os@...logic.com>
To:	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Cc:	<linux@...izon.com>, <linux-kernel@...r.kernel.org>
Subject: Re: Serial custom speed deprecated?

On Mon, 28 Aug 2006, Alan Cox wrote:

> Ar Llu, 2006-08-28 am 08:17 -0400, ysgrifennodd linux-os (Dick Johnson):
>> On Sat, 26 Aug 2006 linux@...izon.com wrote:
>>
>>>> Or we could just add a standardised extra set of speed ioctls, but then
>>>> we need to decide what occurs if I set the speed and then issue a
>>>> termios call - does it override or not.
>>>
>>> Actually, we're not QUITE out of bits.  CBAUDEX | B0 is not taken.
>>
>> B0 is not a bit (there are no bits in 0). It won't work.
>
> Well that is how it is implemented and everyone else seems happy. If it
> violates your personal laws of physics you'll just have to cope.

It has nothing to do with 'personal laws of physics'. On all recent
implementations, B0 is 0, i.e., the absence of any bits set. Therefore,
there is no observable difference between CBAUDEX and CBAUDEX | B0,
as shown above. Therefore, as I stated, it won't work.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.24 on an i686 machine (5592.62 BogoMips).
New book: http://www.AbominableFirebug.com/
_
..

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