linux-kernel - Re: [PATCH] rtc: add rtc

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Message-ID: <20090203070924.1e02955e@i1501.lan.towertech.it>
Date:	Tue, 3 Feb 2009 07:09:24 +0100
From:	Alessandro Zummo <alessandro.zummo@...ertech.it>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ed Swierk <eswierk@...stanetworks.com>, rtc-linux@...glegroups.com,
	tglx@...utronix.de, mingo@...hat.com, linux-kernel@...r.kernel.org,
	Roman Zippel <zippel@...ux-m68k.org>
Subject: Re: [PATCH] rtc: add rtc_systohc for ntp use

On Mon, 2 Feb 2009 14:26:13 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:

> > No attempt is made to compensate for the 500-ms delay imposed when
> > setting a cmos rtc chip.  If you actually have a cmos rtc you can stick
> > with the existing code, but at some point it would be nice to unify
> > these.
> 
> I don't get this.  Do we not currently update the cmos clock in
> response to NTP controls?  Does the patch now alter this policy, by now
> updating the RTC?

 Hi Andrew, please do not apply yet. It's still experimental.
 The clock is not currently updated in ntp mode and my original patch
 plus Ed's work is meant to fix this.

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

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