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

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Message-ID: <20080430114107.GE3002@enneenne.com>
Date:	Wed, 30 Apr 2008 13:41:07 +0200
From:	Rodolfo Giometti <giometti@...eenne.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	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.

On Fri, Apr 11, 2008 at 03:46:52PM +0100, Alan Cox wrote:
> 
> uart_ is only used by some drivers. We have a whole army of drivers using
> the tty layer directly and another army of drivers using the USB layer.
> 
> You also need a sensible way to talk to the devices, identify support and
> avoid clashing uses of carrier pins.

Hello Alan,

if I add a dedicated line discipline to register/unregister the PPS
source and I leave the pps_event management into
uart_handle_dcd_change() function, it can be acceptable?

The uart_handle_dcd_change() is generic and I need the DCD status to
correctly manage the pps_event. The USB layer is not useful for PPS
stuff.

Thanks for your suggestions,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti@...eenne.com
Linux Device Driver                             giometti@...ux.it
Embedded Systems                     phone:	+39 349 2432127
UNIX programming                     skype:     rodolfo.giometti
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