linux-kernel - Missing OMAP PM layer

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Message-Id: <201601242123.58871@pali>
Date:	Sun, 24 Jan 2016 21:23:58 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Tony Lindgren <tony@...mide.com>,
	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: Missing OMAP PM layer

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.

-- 
Pali Rohár
pali.rohar@...il.com

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