linux-kernel - Re: [PATCH 1/1] LinuxPPS: Pulse per Second support for Linux

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Message-ID: <45DC6FD6.4040005@zytor.com>
Date:	Wed, 21 Feb 2007 08:14:14 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Rodolfo Giometti <giometti@...eenne.com>
CC:	linux-kernel@...r.kernel.org, linuxpps@...enneenne.com
Subject: Re: [PATCH 1/1] LinuxPPS: Pulse per Second support for Linux

Rodolfo Giometti wrote:
> 
> The problem is that sometimes you cannot have a filedescriptor at
> all. Think about a PPS source connected with a CPU's GPIO pin. You
> have no filedes to use and defining one just for a PPS source or for a
> class of PPS sources, I think, is a non sense.
> 

If you have a kernel driver at all, then it makes perfect sense.  If you 
don't have a kernel driver at all, then it's irrelevant to the 
linux-kernel discussion.

> RFC simply doesn't consider the fact that you can have a PPS source
> __without__ a filedes connected with, and a single filedes is
> considered __always__ connected with a single PPS source.

That's the Unix way.

	-hpa

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