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

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Message-ID: <20080822085357.GD21330@tekkaman>
Date:	Fri, 22 Aug 2008 10:53:57 +0200
From:	Rodolfo Giometti <giometti@...eenne.com>
To:	"H. Peter Anvin" <hpa@...or.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>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: LinuxPPS (RESUBMIT 7): the PPS Linux implementation.

On Thu, Aug 21, 2008 at 02:50:15PM -0700, H. Peter Anvin wrote:

> 1. Does this support (calibrated) sources with frequency other than
>    1 Hz?

No. PPS means Pulse-Per-Second. However the code can be used with
different frequencies is up to the userland apps to manage this fact.

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

You are right. :)

Ciao,

Rodolfo

-- 

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Linux Device Driver                          giometti@...ux.it
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