From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lutz Jaenicke Subject: Re: [PATCH v2] lxt PHY: Support for the buggy LXT973 rev A2 Date: Mon, 10 Sep 2012 20:17:47 +0200 Message-ID: <20120910181747.GA5960@lutz.bln.innominate.local> References: <201209101545.q8AFjn7u021483@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: David S Miller , netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Christophe Leroy Return-path: Content-Disposition: inline In-Reply-To: <201209101545.q8AFjn7u021483@localhost.localdomain> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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 ph= y, adding > precautions linked to ERRATA Item 4: >=20 > Item 4: MDIO Interface and Repeated Polling > Problem: Repeated polling of odd-numbered registers via the MDIO inte= rface > 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 --=20 Dr.-Ing. Lutz J=E4nicke CTO Innominate Security Technologies AG /protecting industrial networks/ tel: +49.30.921028-200 fax: +49.30.921028-020 Rudower Chaussee 13 D-12489 Berlin, Germany www.innominate.com Register Court: AG Charlottenburg, HR B 81603 Management Board: Dirk Seewald Chairman of the Supervisory Board: Christoph Leifer