From: Grant Edwards <grant.b.edwards@gmail.com>
To: linux-serial@vger.kernel.org
Subject: Re: New serial card development
Date: Tue, 23 Oct 2012 19:42:28 +0000 (UTC) [thread overview]
Message-ID: <k66rv4$4ir$1@ger.gmane.org> (raw)
In-Reply-To: 20121023191604.GA1942@kroah.com
On 2012-10-23, Greg KH <greg@kroah.com> wrote:
> On Tue, Oct 23, 2012 at 06:45:51PM +0000, Grant Edwards wrote:
>
>> FWIW, in some products we're planning that will require support for
>> various industrial serial protocols, I'm leaning towards abandoning
>> the tty driver approach and writing a stand-alone character device
>> driver. The byte-stream oriented tty/line-discipline layer just
>> doesn't fit well when dealing with frame-oriented industrial protocols
>> that depend on things like 9th bit addressing and detecting
>> sub-millisecond inter-byte timeouts. When I add in the lack of
>> long-term stability in the tty API it seems like it might not be such
>> a bad idea to give up trying to make the tty abstraction fit a use
>> case that's just nothing like a teletype.
>
> What do you mean "lack of long-term stability"? The userspace tty api
> hasn't ever changed or broken.
I meant the in-kernel api.
> Don't focus on in-kernel api,
It's my job to focus on the in-kernel api.
> that's always going to change, no matter what interface you choose to
> use in the kernel.
Maybe it's just my perception, but the the tty API seems to change a
more than the plain character-device API.
--
Grant Edwards grant.b.edwards Yow! I wish I was on a
at Cincinnati street corner
gmail.com holding a clean dog!
next prev parent reply other threads:[~2012-10-23 19:42 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-09 18:43 New serial card development Matt Schulte
2012-10-14 9:37 ` Theodore Ts'o
2012-10-15 19:08 ` Matt Schulte
2012-10-15 23:26 ` Alan Cox
2012-10-16 2:32 ` Theodore Ts'o
2012-10-17 20:24 ` Matt Schulte
2012-10-19 21:21 ` Theodore Ts'o
2012-10-23 16:27 ` Matt Schulte
2012-10-23 16:31 ` Matt Schulte
2012-10-23 18:38 ` Greg KH
2012-10-29 20:04 ` Matt Schulte
2012-10-31 21:55 ` Matt Schulte
2012-11-01 22:03 ` Matt Schulte
2012-11-01 22:26 ` Alan Cox
2012-11-02 18:47 ` Matt Schulte
2012-11-02 20:21 ` Alan Cox
2012-10-23 18:06 ` Grant Edwards
2012-10-23 18:26 ` Alan Cox
2012-10-23 18:45 ` Grant Edwards
2012-10-23 19:16 ` Greg KH
2012-10-23 19:42 ` Grant Edwards [this message]
2012-10-23 20:10 ` Greg KH
2012-10-23 19:24 ` Alan Cox
2012-10-23 19:48 ` Grant Edwards
2012-10-23 20:31 ` Theodore Ts'o
2012-10-23 20:41 ` Grant Edwards
[not found] ` <CAJp1Oe6k7NWqdbYkJnd787JiT55-wSbG+tX1tP7Cy-oPShdVaA@mail.gmail.com>
2012-10-17 20:23 ` Matt Schulte
2012-10-17 21:53 ` Alan Cox
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