From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 2 Apr 2003 19:16:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 2 Apr 2003 19:15:38 -0500 Received: from e31.co.us.ibm.com ([32.97.110.129]:46823 "EHLO e31.co.us.ibm.com") by vger.kernel.org with ESMTP id ; Wed, 2 Apr 2003 19:14:53 -0500 Date: Wed, 2 Apr 2003 16:28:22 -0800 From: Greg KH To: Dave Jones , Pavel Machek , Jan Dittmer , Mark Studebaker , azarah@gentoo.org, KML , Dominik Brodowski , sensors@Stimpy.netroedge.com Subject: Re: lm sensors sysfs file structure Message-ID: <20030403002822.GB5130@kroah.com> References: <1048705473.7569.10.camel@nosferatu.lan> <3E82024A.4000809@portrix.net> <20030326202622.GJ24689@kroah.com> <3E82292E.536D9196@paradyne.com> <20030326225234.GA27436@kroah.com> <3E82D678.9000807@portrix.net> <20030327172516.GA32667@kroah.com> <20030330192312.GB6666@zaurus.ucw.cz> <20030331224439.A7000@kroah.com> <20030401190240.GA6456@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030401190240.GA6456@suse.de> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 02, 2003 at 12:27:47AM +0100, Dave Jones wrote: > On Mon, Mar 31, 2003 at 10:44:39PM -0800, Greg KH wrote: > > > Well, you had cV for PSU voltages and mV for cpu core voltage. I guess mV > > > and mili-deg-C everywhere would be nicer. > > As for why no floating point, it's a pain in the but to both output a > > fixed point number from the kernel into floating point, and to parse a > > floating point number from userspace within the kernel, turning it into > > a fixed point number. With the proposal I wrote up, none of that is > > needed, and all userspace has to do is divide by a factor of 10 to get > > the proper value. > > FWIW, I'm taking the same fixed-point millivolt approach with the > sysfs overrides for cpufreq. Having similar things in sysfs > exporting the same units seems to be a good idea. Hm, in looking around the kernel some more, it seems that there are a number of other places that export voltage and temperature values (ACPI being one of the most obvious.) It might be time to start thinking of a single userspace library to access all of these kinds of values in a system, instead of having to probe around different parts of the sysfs tree by hand... thanks, greg k-h