linux-kernel - Re: [PATCHv3 4/5] rtc: s3c: Add support for RTC of Exynos3250 SoC

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Message-ID: <CAD=FV=UsB0r7UwnNsmzE_fEQnurE=Qf_vZQKidivGYajZX=-dQ@mail.gmail.com>
Date:	Wed, 17 Sep 2014 09:51:29 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Daniel Drake <drake@...lessm.com>
Cc:	Javier Martinez Canillas <javier@...hile0.org>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	rtc-linux@...glegroups.com,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>
Subject: Re: [PATCHv3 4/5] rtc: s3c: Add support for RTC of Exynos3250 SoC

Daniel,

On Wed, Sep 17, 2014 at 9:49 AM, Daniel Drake <drake@...lessm.com> wrote:
> On Tue, Sep 16, 2014 at 4:15 PM, Doug Anderson <dianders@...omium.org> wrote:
>> NOTE: I don't think that the builtin RTC is terribly important for any
>> exynos-based Chromebooks that I'm aware of.  We rely on the RTC that's
>> part of the Maxim PMIC itself and pretty much ignore the one built-in
>> to the exynos.  I think there are some cases it was used (as a
>> fallback wakeup source in certain test scripts), but nothing very
>> important.
>
> That's not true for all hardware though, at least the board I'm
> working on now has the SoC RTC as battery-backed and the PMIC one with
> no battery. So in this case at least, the interesting RTC is the SoC
> one.

Yup, I can totally believe that.  My statement was meant only to apply
to the boards I knew about firsthand...

-Doug
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