linux-kernel - Re: [rtc-linux] [PATCH 04/10] RTC: Cleanup rtc_class_ops->read

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Message-ID: <1298404399.9215.42.camel@work-vm>
Date:	Tue, 22 Feb 2011 11:53:19 -0800
From:	john stultz <johnstul@...ibm.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	rtc-linux@...glegroups.com, LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Marcelo Roberto Jimenez <mroberto@...i.cetuc.puc-rio.br>
Subject: Re: [rtc-linux] [PATCH 04/10] RTC: Cleanup
 rtc_class_ops->read_alarm()

On Tue, 2011-02-22 at 10:16 -0800, Mark Brown wrote:
> On Tue, Feb 22, 2011 at 12:09:38AM -0800, john stultz wrote:
> 
> > Just so I can better get a grip of the cases your considering, could you
> > maybe give me some more detailed examples of where you'd like to see the
> > alarm timer be set and then persist across multiple power cycles before
> > firing? And how is that persistent value managed by the application
> > setting it?
> 
> The WM83xx RTCs can do this (the alarm can be used to initiate a boot)
> and I'd expect many embedded RTC controllers can do similar.

Oh, and would you be able to test the possible solution I have for this?
Since the hardware I have doesn't support alarm persistence across
reset, I'm limited in being able to validate the patch's correctness. 

thanks
-john


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