Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760480Ab3GSNFU (ORCPT ); Fri, 19 Jul 2013 09:05:20 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:50180 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760287Ab3GSNFR (ORCPT ); Fri, 19 Jul 2013 09:05:17 -0400 Message-ID: <51E9392F.8060604@ti.com> Date: Fri, 19 Jul 2013 09:03:43 -0400 From: Eduardo Valentin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130510 Thunderbird/17.0.6 MIME-Version: 1.0 To: Guenter Roeck CC: Stephen Warren , Eduardo Valentin , Grant Likely , Rob Herring , , , , , , Subject: Re: [lm-sensors] [RESEND PATCH V1 0/9] thermal: introduce DT thermal zone build References: <1374074248-31690-1-git-send-email-eduardo.valentin@ti.com> <20130717220942.GB990@roeck-us.net> <51E7F341.8020508@ti.com> <51E8234D.1020607@wwwdotorg.org> <20130718212108.GC4110@roeck-us.net> In-Reply-To: <20130718212108.GC4110@roeck-us.net> X-Enigmail-Version: 1.5.1 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="----enig2BIREBRJXPSEJHVPFLJRW" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3410 Lines: 94 ------enig2BIREBRJXPSEJHVPFLJRW Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 18-07-2013 17:21, Guenter Roeck wrote: > On Thu, Jul 18, 2013 at 11:18:05AM -0600, Stephen Warren wrote: >> On 07/18/2013 07:53 AM, Eduardo Valentin wrote: >>> Hello Guenter, >>> >>> On 17-07-2013 18:09, Guenter Roeck wrote: >>>> On Wed, Jul 17, 2013 at 11:17:19AM -0400, Eduardo Valentin >>>> wrote: >>>>> Hello all, >>>>> >>>>> As you noticed, I am working in a way to represent thermal >>>>> data using device tree [1]. Essentially, this should be a way >>>>> to say what to do with a sensor and how to associate (cooling) >>>>> actions with it. >>>>> >>>> Seems to me that goes way beyond the supposed scope of devicetree >>>> data. Devicetree data is supposed to describe hardware, not its >>>> configuration or use. This is clearly a use case. >>> >>> Thanks for rising your voice here. It is important to know what >>> hwmon ppl think about this. >> >> I meant to find time to read Guenter's original email where he >> initially objected to putting data into DT, and determine exactly what= >> was being objected to. I still haven't:-( However, the arguments that >> Eduardo stated in his email do make sense to me; I agree that >> temperature limits really are a description of HW. Details of which >> cooling methods to invoke when certain temperature limits are reached >> is also part of the HW/system design, and hence I would tend to agree >> that they're appropriate to include in DT. Anyway, that's just my 2 >> cents on the matter:-) >=20 > Many systems have multiple profiles for various use cases (high perform= ance, > low power etc), and limits are different based on the use case. If that= means > you are going to have multiple devicetree variants based on the profile= , No, definitely this patch series is *not* about mapping multiples profiles for various use cases on device tree! This series is about mapping *hw thermal limits* on device tree. > I would argue that you crossed the line. With thermal profiles it gets = even more > complicated, as those parameters may be played around with and changed > multiple times to find the best settings to achieve optimal cooling. > Does this describe hardware ? I don't think so, but, as I mentioned bef= ore, > maybe I am wrong. Again, this is about describing points and actions to avoid your hw degradation. May be also useful to avoid end user harm. This series is not about describing performance profiles. >=20 > Guenter >=20 >=20 --=20 You have got to be excited about what you are doing. (L. Lamport) Eduardo Valentin ------enig2BIREBRJXPSEJHVPFLJRW Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iF4EAREIAAYFAlHpOTYACgkQCXcVR3XQvP1NHgEA7ywKtUv4uynaz3d9jz+0loXf OwksdKtQvXKOf0aiKVwA/j63Xo1FE8uul74h3pYRfysJDOdE0AtatjHl4P3MI+zP =bzLm -----END PGP SIGNATURE----- ------enig2BIREBRJXPSEJHVPFLJRW-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/