Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758911AbZDGPI6 (ORCPT ); Tue, 7 Apr 2009 11:08:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758182AbZDGPHm (ORCPT ); Tue, 7 Apr 2009 11:07:42 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:46759 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758502AbZDGPHk convert rfc822-to-8bit (ORCPT ); Tue, 7 Apr 2009 11:07:40 -0400 From: "Narnakaje, Snehaprabha" To: Thomas Gleixner CC: "linux-mtd@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "davinci-linux-open-source@linux.davincidsp.com" , "Paulraj, Sandeep" Date: Tue, 7 Apr 2009 10:07:16 -0500 Subject: RE: [PATCH] MTD-NAND: Changes to read_page APIs to support NAND_ECC_HW_SYNDROME mode on TI DaVinci DM355 Thread-Topic: [PATCH] MTD-NAND: Changes to read_page APIs to support NAND_ECC_HW_SYNDROME mode on TI DaVinci DM355 Thread-Index: Acm3DJO47XIQrYrxTciH3CafgfUNLAAhNAlw Message-ID: <7A436F7769CA33409C6B44B358BFFF0CFFAA8FCA@dlee02.ent.ti.com> References: <1238601784-9563-1-git-send-email-nsnehaprabha@ti.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1734 Lines: 58 Thomas, > -----Original Message----- > From: Thomas Gleixner [mailto:tglx@linutronix.de] > Sent: Monday, April 06, 2009 7:08 PM > To: Narnakaje, Snehaprabha > Cc: linux-mtd@lists.infradead.org; linux-kernel@vger.kernel.org; davinci- > linux-open-source@linux.davincidsp.com; Paulraj, Sandeep > Subject: Re: [PATCH] MTD-NAND: Changes to read_page APIs to support > NAND_ECC_HW_SYNDROME mode on TI DaVinci DM355 > > Sneha, > > On Wed, 1 Apr 2009, nsnehaprabha@ti.com wrote: > > Would you please care to CC the still caring but admittedly lazy and > distracted maintainer on such patches ? Who would that be? Is the list below correct? Steven J. Hill (sjhill@realitydiluted.com) Thomas Gleixner (tglx@linuxtronix.de) David Woodhouse (dwmw2@infradead.org) > > > From: Sneha Narnakaje > > > > The NAND controller on TI DaVinci DM355 supports NAND devices with large > page size (2K and 4K), but the HW ECC is handled for every 512byte > read/write chunks. The current HW_SYNDROME read_page/write_page APIs in > the NAND core (nand_base) use the "infix OOB" scheme. The core APIs > overwrite NAND manufacturer's bad block meta data, thus complicating the > jobs of non-Linux NAND programmers (end equipment manufacturering). These > APIs also imply ECC protection for the prepad bytes, causing nand > raw_write operations to fail. > > Please use proper line breaks. 523 characters do not fit into a > terminal. OK. Thanks Sneha > > Thanks, > > tglx > > -- 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/