From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Ni <wni@nvidia.com>
Subject: Re: How to use the generic thermal sysfs.
Date: Fri, 27 Jul 2012 18:48:42 +0800
Message-ID: <1343386122.4042.88.camel@tegra-chromium-2>
References: <1342088573.27605.101.camel@tegra-chromium-2>
	 <4D68720C2E767A4AA6A8796D42C8EB5915287C@BGSMSX101.gar.corp.intel.com>
	 <1342144273.1682.237.camel@rui.sh.intel.com>
	 <1342164616.27605.129.camel@tegra-chromium-2>
	 <1342165278.1682.259.camel@rui.sh.intel.com>
	 <1343295094.4042.24.camel@tegra-chromium-2>
	 <1343352098.1682.447.camel@rui.sh.intel.com>
	 <1343357901.4042.70.camel@tegra-chromium-2>
	 <20120727093037.094335eb@endymion.delvare>
	 <1343374793.1682.475.camel@rui.sh.intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: QUOTED-PRINTABLE
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <1343374793.1682.475.camel@rui.sh.intel.com>
Sender: linux-kernel-owner@vger.kernel.org
To: Zhang Rui <rui.zhang@intel.com>
Cc: Jean Delvare <khali@linux-fr.org>, "R, Durgadoss" <durgadoss.r@intel.com>, "Brown, Len" <len.brown@intel.com>, "akpm@linux-foundation.org" <akpm@linux-foundation.org>, "joe@perches.com" <joe@perches.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-tegra@ger.kernel.org" <linux-tegra@ger.kernel.org>, Alex Courbot <acourbot@nvidia.com>
List-Id: linux-tegra@vger.kernel.org

On Fri, 2012-07-27 at 15:39 +0800, Zhang Rui wrote:
> On =E4=BA=94, 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?
> > >=20
> > > Since we are using the generic thermal driver lm90.c, I'm not sur=
e if we
> > > could program these limits in the generic driver, I think it's be=
tter to
> > > have a generic interface to set the limits, so I wish to add a
> > > callback .set_limits() in the generic thermal framework.
> >=20
> > 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.
> >=20
> oh, setting limits from userspace?
> I think you can program the senor when writing the trip point?
> with this patch,
> http://marc.info/?l=3Dlinux-acpi&m=3D134318814620429&w=3D2

Do you mean it can use .set_trip_temp() to set limits when writing the
trip point? But I think this callback is used to change the trip_temp,
it could not used to set the limits, in here the limit value is used to
trigger the interrupt.

>=20
> thanks,
> rui
>=20
>=20