From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753020Ab2IVQVl (ORCPT ); Sat, 22 Sep 2012 12:21:41 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:22779 "EHLO mailhub1.si.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752176Ab2IVQVk (ORCPT ); Sat, 22 Sep 2012 12:21:40 -0400 Message-ID: <505DE592.8060103@c-s.fr> Date: Sat, 22 Sep 2012 18:21:38 +0200 From: leroy christophe User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:15.0) Gecko/20120907 Thunderbird/15.0.1 MIME-Version: 1.0 To: Lutz Jaenicke CC: David S Miller , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] lxt PHY: Support for the buggy LXT973 rev A2 References: <201209101545.q8AFjn7u021483@localhost.localdomain> <20120910181747.GA5960@lutz.bln.innominate.local> In-Reply-To: <20120910181747.GA5960@lutz.bln.innominate.local> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le 10/09/2012 20:17, Lutz Jaenicke a écrit : > On Mon, Sep 10, 2012 at 05:45:49PM +0200, Christophe Leroy wrote: >> This patch adds proper handling of the buggy revision A2 of LXT973 phy, adding >> precautions linked to ERRATA Item 4: >> >> Item 4: MDIO Interface and Repeated Polling >> Problem: Repeated polling of odd-numbered registers via the MDIO interface >> randomly returns the contents of the previous even register. >> Implication: Managed applications may not obtain the correct register contents >> when a particular register is monitored for device status. >> Workaround: None. >> Status: This erratum has been previously fixed (in rev A3) > Hmm. Were did you get the hardware from? We have been using LXT973 in > our products and the A2 was replaced by A3 in 2003. > > Best regards, > Lutz They are custom boards that my company manufactures. Most boards manufactured before 2006 or 2007 have this buggy chip. Regards Christophe