linux-kernel - Re: Missing OMAP PM layer

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Date:	Mon, 25 Jan 2016 18:24:13 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Tony Lindgren <tony@...mide.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

On Monday 25 January 2016 17:34:42 Tony Lindgren wrote:
> * 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.

Ok, and what was that omap-pm? Do you know what Nokia omap-pm-srf.c do?

-- 
Pali Rohár
pali.rohar@...il.com

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