linux-kernel - Re: [PATCH 5/7] PPS: serial clients support.

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Message-ID: <20080411092840.3cc4de67@core>
Date:	Fri, 11 Apr 2008 09:28:40 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Rodolfo Giometti <giometti@...eenne.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Dave Jones <davej@...hat.com>, Sam Ravnborg <sam@...nborg.org>,
	Greg KH <greg@...ah.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Kay Sievers <kay.sievers@...y.org>
Subject: Re: [PATCH 5/7] PPS: serial clients support.

> How can I do that? From a serial device I just need the IRQ time
> arrival, no other data at all. How a ldisc can help me in this task?

At the moment you can't. That needs fixing. Most of the infrastructure is
there but not all of it.

> This patch adds PPS support just for UARTs, other devices should
> provide their own support by using the new provided API. :)

I do not want PPS code adding to every single serial driver. That way
lies madness. We do it once, and in the right layer. I'll take a further
look at it after the tty->ops patch is merged. At that point we'll be in
a good position to add the needed ops/callbacks.

Alan
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