linux-kernel - Re: [PATCH 12/12] ARM: dts: am335x-bone-common: enable power off and rtc wake up

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Message-ID: <20141011103432.GF18988@localhost>
Date:	Sat, 11 Oct 2014 12:34:32 +0200
From:	Johan Hovold <johan@...nel.org>
To:	Felipe Balbi <balbi@...com>
Cc:	Johan Hovold <johan@...nel.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Tony Lindgren <tony@...mide.com>,
	Benoît Cousson <bcousson@...libre.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Lokesh Vutla <lokeshvutla@...com>,
	Guenter Roeck <linux@...ck-us.net>, nsekhar@...com,
	t-kristo@...com, j-keerthy@...com, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/12] ARM: dts: am335x-bone-common: enable power off and
 rtc wake up

On Fri, Oct 10, 2014 at 01:09:49PM -0500, Felipe Balbi wrote:
> On Thu, Oct 09, 2014 at 09:06:34PM +0200, Johan Hovold wrote:
> > Configure the RTC as system-power controller, which allows the system to
> > be powered off as well as woken up again on subsequent RTC alarms.
> > 
> > Note that the PMIC needs to be put in SLEEP (rather than OFF) mode to
> > maintain RTC power. Specifically, this means that the PMIC
> > ti,pmic-shutdown-controller property must be left unset in order to be
> > able to wake up on RTC alarms.
> > 
> > Tested on BeagleBone Black (rev A5).
> 
> one thing though. IIRC, rtc-only mode does not work with ES1.0 and
> beagle-bone white uses that. Perhaps move this from bone-common to
> boneblack.dts ?

Yeah, I had a quick look at the errata and you seem to be correct. I'll
move it to boneblack.dts.

> other than that
> 
> Reviewed-by: Felipe Balbi <balbi@...com>

Thanks,
Johan
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