linux-kernel - Re: [PATCH] acerhdf: Fix fan activation with new thermal governor

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Message-ID: <1361761101.2303.5.camel@rzhang1-mobl4>
Date:	Mon, 25 Feb 2013 10:58:21 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Durgadoss R <durgadoss.r@...el.com>,
	Borislav Petkov <bp@...e.de>, Peter Feuerer <peter@...e.net>,
	Andreas Mohr <andi@...as.de>,
	Alexander Lam <azl@...rew.cmu.edu>
Subject: Re: [PATCH] acerhdf: Fix fan activation with new thermal governor

On Sun, 2013-02-24 at 12:28 +0100, Borislav Petkov wrote:
> On Sat, Feb 23, 2013 at 08:20:10PM +0100, Borislav Petkov wrote:
> > From: Borislav Petkov <bp@...e.de>
> > 
> > The new step_wise thermal governor wasn't able to handle the one-trip
> > point design of acerhdf where we want to turn off the fan if we go under
> > the 'fanoff' temperature and to turn it on only after exceeding the
> > 'fanon' temperature.
> > 
> > Do that by looking at the current fan state and return the temperature
> > accordingly.
> > 
> > Suggested-by: Zhang Rui <rui.zhang@...el.com>
> > Cc: Peter Feuerer <peter@...e.net>
> > Cc: Andreas Mohr <andi@...as.de>
> > Cc: Alexander Lam <azl@...rew.cmu.edu>
> > Signed-off-by: Borislav Petkov <bp@...e.de>
> 
> Ok, ignore this one for now - the suspend/resume path doesn't pan out
> somehow, need to do some more handholding here.
> 
hmm,
this reminds me that we should do a thermal_zone_device_update() for
each registered thermal zone when resuming from system suspend.

thanks,
rui

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