linux-kernel - Re: [PATCH] PM: Kconfig: Set PM_RUNTIME if PM

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Date:	Mon, 17 Nov 2014 19:52:37 -0800
From:	Kevin Hilman <khilman@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Linux PM list <linux-pm@...r.kernel.org>,
	linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	LKML <linux-kernel@...r.kernel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: Re: [PATCH] PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is selected

"Rafael J. Wysocki" <rjw@...ysocki.net> writes:

> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> The number of and dependencies between high-level power management
> Kconfig options make life much harder than necessary.  Several
> conbinations of them have to be tested and supported, even though
> some of those combinations are very rarely used in practice (it
> they are used in practice at all).  Moreover, the fact that we
> have separate independent Kconfig options for runtime PM and
> system suspend is a serious obscacle for integration between
> the two frameworks.
>
> To overcome these difficulties, always select PM_RUNTIME if PM_SLEEP
> is set.  Among other things, this will allow system suspend callbacks
> provided by bus types and device drivers to rely on the runtime PM
> framework regardless of the kernel configuration.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
>
> As a follow up.
>
> Note that we won't need the patch making genpd select PM_RUNTIME with this,
> because genpd already depends on PM.
>
> Thoughts, comments?

Acked-by: Kevin Hilman <khilman@...aro.org>

...with dancing and singing in the streets (or more my speed: a
celebratory beer.) 

Kevin

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