linux-kernel - Re: How to use the generic thermal sysfs.

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Message-ID: <1343374793.1682.475.camel@rui.sh.intel.com>
Date:	Fri, 27 Jul 2012 15:39:53 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Wei Ni <wni@...dia.com>, "R, Durgadoss" <durgadoss.r@...el.com>,
	"Brown, Len" <len.brown@...el.com>, akpm@...ux-foundation.org,
	joe@...ches.com, linux-kernel@...r.kernel.org,
	linux-tegra@....kernel.org, Alex Courbot <acourbot@...dia.com>
Subject: Re: How to use the generic thermal sysfs.

On 五, 2012-07-27 at 09:30 +0200, Jean Delvare wrote:
> On Fri, 27 Jul 2012 10:58:21 +0800, Wei Ni wrote:
> > On Fri, 2012-07-27 at 09:21 +0800, Zhang Rui wrote:
> > > is it possible to program the sensor at this time, in your own thermal
> > > driver?
> > 
> > Since we are using the generic thermal driver lm90.c, I'm not sure if we
> > could program these limits in the generic driver, I think it's better to
> > have a generic interface to set the limits, so I wish to add a
> > callback .set_limits() in the generic thermal framework.
> 
> I can confirm that hwmon drivers do not set limits, it is up to
> user-space to do it if they want. So if there is a need to do so in the
> kernel itself, a proper interface at the generic thermal framework
> level seems appropriate.
> 
oh, setting limits from userspace?
I think you can program the senor when writing the trip point?
with this patch,
http://marc.info/?l=linux-acpi&m=134318814620429&w=2

thanks,
rui


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