Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756869Ab1CNQAf (ORCPT ); Mon, 14 Mar 2011 12:00:35 -0400 Received: from moutng.kundenserver.de ([212.227.126.186]:55861 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755616Ab1CNQAd (ORCPT ); Mon, 14 Mar 2011 12:00:33 -0400 From: Arnd Bergmann To: Waldemar.Rymarkiewicz@tieto.com Subject: Re: [PATCH] NFC: Driver for Inside Secure MicroRead NFC chip Date: Mon, 14 Mar 2011 17:00:26 +0100 User-Agent: KMail/1.12.2 (Linux/2.6.37; KDE/4.3.2; x86_64; ; ) Cc: matti.j.aaltonen@nokia.com, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, hthebaud@insidefr.com References: <1299766808-2535-1-git-send-email-waldemar.rymarkiewicz@tieto.com> <201103141634.10865.arnd@arndb.de> <99B09243E1A5DA4898CDD8B7001114481082FAE15A@EXMB04.eu.tieto.com> In-Reply-To: <99B09243E1A5DA4898CDD8B7001114481082FAE15A@EXMB04.eu.tieto.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201103141700.26457.arnd@arndb.de> X-Provags-ID: V02:K0:dzP4yZOK37/o8L7qjFEnS2hiSNBS7MN+C1GmaDllAvA 03z03rdhvigD0NKsZNzFxHZ6DwVHBDrr2eLooDDrbkYV7qo5yH wKjtSQOleMvJB0N2qQn85rsSBfWjEub/G0qISerfspaYOvx5qm i9utjj9+srKjrZgdytORq10bh4jbMOlzqcKNPZ1pQ0lXgqClIZ IQMJpyoZsRT8dCEMFlVkA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 834 Lines: 21 On Monday 14 March 2011, Waldemar.Rymarkiewicz@tieto.com wrote: > > > >If the usleep_range is trying to synchronize between the NFC > >and the I2C chip, you must wait for a notication from the NFC > >hardware that it's done. > > No, it's simply there as I have been faceing i2c write error while > I do two consecutive writes. > The second fails now and then. That's seems to be a chip issue. > I will try to investigate this issue. Ok. It sounds like a bug in the i2c driver, you should also take a look there. Maybe it has never had to deal with this much write data at once. Arnd -- 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/