linux-kernel - Re: [lm-sensors] [PATCH 1/2 V3] applesmc: Use PnP rather than hardcoding resources and devices

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Message-ID: <20101220150648.GA19922@polaris.bitmath.org>
Date:	Mon, 20 Dec 2010 16:06:48 +0100
From:	"Henrik Rydberg" <rydberg@...omail.se>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Jean Delvare <khali@...ux-fr.org>,
	Mikael Ström <mikael@...amiq.com>,
	Julien BLACHE <jb@...ache.org>,
	Guenter Roeck <guenter.roeck@...csson.com>,
	"lm-sensors@...sensors.org" <lm-sensors@...sensors.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [lm-sensors] [PATCH 1/2 V3] applesmc: Use PnP rather than
 hardcoding resources and devices

On Mon, Dec 20, 2010 at 02:28:15PM +0000, Matthew Garrett wrote:
> On Mon, Dec 20, 2010 at 03:23:44PM +0100, Henrik Rydberg wrote:
> 
> > The macbook overheat problems goes way back. All models have automatic
> > heat protection, but it kicks in at temperatures uncomfortable to most
> > users. The severity also depends on when the model was made. The
> > current solution is to use the macfanctld driver, which disables
> > automatic fan control, replacing it with a control loop yielding more
> > workable temperatures. A fan control solution in the kernel would
> > certainly be well received.
> 
> There is one, you just need to hook into the thermal device interface.

Right. The fans and the right sensors need to be plugged in, which
seems like it should happen at the same time the platform device is
removed. Thanks to macfanctld, there might even be enough information
regarding what sensors to use. Just about.

Henrik
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