Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262209AbUKDNIT (ORCPT ); Thu, 4 Nov 2004 08:08:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262216AbUKDNIT (ORCPT ); Thu, 4 Nov 2004 08:08:19 -0500 Received: from zone3.gcu-squad.org ([217.19.50.74]:62473 "EHLO zone3.gcu-squad.org") by vger.kernel.org with ESMTP id S262209AbUKDNIQ convert rfc822-to-8bit (ORCPT ); Thu, 4 Nov 2004 08:08:16 -0500 Date: Thu, 4 Nov 2004 14:02:36 +0100 (CET) To: degger@fhm.edu Subject: Re: dmi_scan on x86_64 X-IlohaMail-Blah: khali@gcu.info X-IlohaMail-Method: mail() [mem] X-IlohaMail-Dummy: moo X-Mailer: IlohaMail/0.8.13 (On: webmail.gcu.info) Message-ID: In-Reply-To: <1214282D-2E5B-11D9-BF00-000A958E35DC@fhm.edu> From: "Jean Delvare" Bounce-To: "Jean Delvare" CC: "LKML" MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1816 Lines: 41 On 4/11/2004, Daniel Egger wrote: > The sensors conf for the S2875 provided by Tyan only displays > 3 FAN RPM values while the board has at least 4. At the moment I'm > using 3 fans with tacho signal but can only determine 2 values, the > third value is constantly 0. The (admittedly limited) documentation [1] I have for the S2875 states that only 3 of the 6 fan headers have their tachometer pin wired. This matches the W83627HF hardware monitoring chip capabilities, which is why I see no evidence of any kind of multiplexing on that board. > Also the setup puzzles me a bit; why would Tyan pack several SMBus > setups into a single motherboard but only connect devices to one > of them. Actually sensors-detect claims that there is one > unrecognized client on the "unused" SMBus. Not all SMBus clients are hardware monitoring chips. The fact that sensors-detect didn't recognize it would even suggest that your unknown chip isn't. What you see may be about anything, including pseudo-clients used for the SMBus protocol itself. Feel free to submit a dump (using i2cdump) of that unknown chip if you want me to comment on it. As a side note, Tyan actually has a long history of embedding more than one hardware monitoring chip in their high-end server boards. This makes full sense when the board has plenty of fan headers and supports several CPU. The S4882 for example has 6 hardware monitoring chips, and this is one reason why the SMBus had to be multiplexed (4 of these chips use the same address). [1] ftp://ftp.tyan.com/datasheets/d_s2875_120.pdf Jean - 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/