linux-kernel - Re: [Update][PATCH 7/8] PM / Domains: System-wide transitions support for generic domains (v3)

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Message-ID: <8739j1lemc.fsf@ti.com>
Date:	Wed, 22 Jun 2011 14:50:51 -0700
From:	Kevin Hilman <khilman@...com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	"Greg Kroah-Hartman" <gregkh@...e.de>,
	Magnus Damm <magnus.damm@...il.com>,
	Paul Walmsley <paul@...an.com>,
	Alan Stern <stern@...land.harvard.edu>,
	LKML <linux-kernel@...r.kernel.org>, linux-sh@...r.kernel.org
Subject: Re: [Update][PATCH 7/8] PM / Domains: System-wide transitions support for generic domains (v3)

"Rafael J. Wysocki" <rjw@...k.pl> writes:

> From: Rafael J. Wysocki <rjw@...k.pl>
>
> Make generic PM domains support system-wide power transitions
> (system suspend and hibernation).  Add suspend, resume, freeze, thaw,
> poweroff and restore callbacks to be associated with struct
> generic_pm_domain objects and make pm_genpd_init() use them as
> appropriate.
>
> The new callbacks do nothing for devices belonging to power domains
> that were powered down at run time (before the transition).  

Great, this is the approach I prefer too, but...

Now I'm confused.  Leaving runtime suspended devices alone is what I was
doing in my subsystem but was told not to.  According to

    http://www.mail-archive.com/linux-omap@vger.kernel.org/msg50690.html

"it's generally agreed that _all_ devices should return to full 
power during system resume -- even if they were runtime suspended 
before the system sleep."

Kevin
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