linux-kernel - Re: LinuxPPS (RESUBMIT 7): the PPS Linux implementation.

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Date:	Thu, 21 Aug 2008 14:50:15 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Rodolfo Giometti <giometti@...ux.it>
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>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: LinuxPPS (RESUBMIT 7): the PPS Linux implementation.

Rodolfo Giometti wrote:
> This patch set adds the PPS support into Linux.

A couple of general questions about this (I don't know the background 
material in enough detail, so pardon if some of these are "obvious"):

1. Does this support (calibrated) sources with frequency other than
    1 Hz?
2. I assume that with the PPS line discipline loaded you can still read
    the data from the main pins on the serial port (almost always used
    for metadata?)

And a minor note: you use the term CD (Carrier Detect), but in most 
references the pin is labelled DCD (Data Carrier Detect).

	-hpa

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