From: Mark Brown <broonie@kernel.org>
Subject: Re: [PATCH] PM / Domains: Fix initial default state of the
 need_restore flag
Date: Thu, 13 Nov 2014 19:11:29 +0000
Message-ID: <20141113191129.GP3815@sirena.org.uk>
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Sender: linux-pm-owner@vger.kernel.org
To: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>, Ulf Hansson <ulf.hansson@linaro.org>, Alan Stern <stern@rowland.harvard.edu>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Dmitry Torokhov <dmitry.torokhov@gmail.com>, Kevin Hilman <khilman@kernel.org>, Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>, "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>, Geert Uytterhoeven <geert+renesas@glider.be>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>


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On Thu, Nov 13, 2014 at 09:07:43PM +0200, Grygorii Strashko wrote:
> On 11/13/2014 07:54 PM, Mark Brown wrote:

> > No, it doesn't - probe() leaves the device powered (you can see the
> > driver interacting with the device before it enables runtime PM).

> What I've found there is:
> arizona_dev_init()
>  |- arizona_clk32k_enable()
>     |-pm_runtime_get_sync() if arizona->pdata.clk32k_src == ARIZONA_32KZ_MCLK1

> so it's added as "may rely"

No, that's adding a reference to stop it power down under runtime PM -
if runtime PM is inactive it will have no effect.

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