linux-kernel - Re: [PATCH 00/12] rtc: omap: fixes and power-off feature

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Date:	Wed, 22 Oct 2014 13:07:58 +0200
From:	Johan Hovold <johan@...nel.org>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Johan Hovold <johan@...nel.org>, Felipe Balbi <balbi@...com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	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 00/12] rtc: omap: fixes and power-off feature

On Sat, Oct 11, 2014 at 12:08:18PM -0700, Tony Lindgren wrote:
> * Johan Hovold <johan@...nel.org> [141011 02:42]:
> > On Fri, Oct 10, 2014 at 12:54:22PM -0500, Felipe Balbi wrote:
> > > 
> > > is this power-off feature "RTC-only mode" ?
> > 
> > Yes, I believe so, at least as long as RTC power is maintained. The
> > pmic_power_en pin can otherwise still be used to power off. 
> > 
> > On the BeagleBone the PMIC can be configured to enter OFF or SLEEP mode
> > on power off, where the latter (and default) mode keeps the RTC power
> > supply enabled.
> > 
> > Thanks for the fast review, Felipe.
> 
> Great :) I assume adding the regulator support to this driver should
> also help in the 35xx case?

If I remember correctly both OMAP and Sitara 35xx have no on-chip RTC so
they won't be using this driver.

> That is assuming that RTC power can be configured as a Linux
> regulator on 35xx.

Johan
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