linux-kernel - Re: Missing OMAP PM layer

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Message-ID: <20160125163442.GU19432@atomide.com>
Date:	Mon, 25 Jan 2016 08:34:42 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Kevin Hilman <khilman@...prootsystems.com>,
	Sebastian Reichel <sre@...nel.org>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Pavel Machek <pavel@....cz>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Nishanth Menon <nm@...com>, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Missing OMAP PM layer

* Pali Rohár <pali.rohar@...il.com> [160124 12:24]:
> Hello,
> 
> make menuconfig allows me to choose "OMAP PM layer selection" and the 
> only one option is CONFIG_OMAP_PM_NOOP "No-op/debug PM layer".
> 
> What does it mean? Power manager is noop?
> 
> I see that it has only two corresponding files in mainline kernel:
> arch/arm/mach-omap2/omap-pm.h
> arch/arm/mach-omap2/omap-pm-noop.c
> 
> Nokia's kernels (for N900 and N950) had also:
> arch/arm/mach-omap2/omap-pm-srf.c
> 
> Can somebody explain it what happened with omap power management?
> 
> Looks like that omap-pm.h provides some API, but the only implementation 
> is noop which do nothing.

I believe none of that is needed any longer in mainline.

Kevin, care to descrbibe what should be done here?

Regards,

Tony