linux-kernel - Re: RTC subsystem and fractions of seconds

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Message-ID: <20070107101449.GA24163@ingate.macqel.be>
Date:	Sun, 7 Jan 2007 11:14:49 +0100
From:	Philippe De Muyter <phdm@...qel.be>
To:	David Brownell <david-b@...bell.net>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: RTC subsystem and fractions of seconds

On Fri, Jan 05, 2007 at 07:49:00PM -0800, David Brownell wrote:
> >  	Those rtc's actually have a 1/100th of second
> > register.  Should the generic rtc interface not support that?
> 
> Are you implying a new userspace API, or just an in-kernel update?
> 
> Either way, that raises the question of what other features should
> be included.  What sub-second precision?  Multiple alarms?  Ways
> to manage output clocks?  Sub-HZ periodic alarms?

One usefull addition for my needs and with a m41t81 is the support of
the calibration of the rtc.  However this can perhaps be hidden in the
.set_mmss function.

Philippe

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