From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WQYOI-0006Qz-Dh for linux-mtd@lists.infradead.org; Thu, 20 Mar 2014 08:31:54 +0000 From: Juergen Beisert To: linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] mtd: gpmi: make blockmark swapping optional Date: Thu, 20 Mar 2014 09:33:39 +0100 References: <1395235406-13449-1-git-send-email-y> In-Reply-To: <1395235406-13449-1-git-send-email-y> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <201403200933.39382.jbe@pengutronix.de> Cc: Fabio Estevam , Mark Rutland , Russell King , Pawel Moll , Arnd Bergmann , Ian Campbell , Artem Bityutskiy , y@karo-electronics.de, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Huang Shijie , devicetree@vger.kernel.org, Rob Herring , linux-mtd@lists.infradead.org, Rob Landley , Kumar Gala , Brian Norris , David Woodhouse , Sascha Hauer , Shawn Guo , Lothar =?utf-8?q?Wa=C3=9Fmann?= List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Lothar, On Wednesday 19 March 2014 14:23:26 y@karo-electronics.de wrote: > With a flash-based BBT there is no reason to move the Factory Bad > Block Marker from the data area buffer (to where it is mapped by the > GPMI NAND controller) to the OOB buffer. Thus, make this feature > configurable via DT. This is required for the Ka-Ro electronics > platforms. > [...] How do you create the BBT the very first time with valuable data when the N= AND=20 already contains factory bad blocks? jbe =2D-=20 Pengutronix e.K. =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0| Juergen Beisert =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 | Linux Solutions for Science and Industry =C2=A0 =C2=A0 =C2=A0| http://www.p= engutronix.de/ | From mboxrd@z Thu Jan 1 00:00:00 1970 From: jbe@pengutronix.de (Juergen Beisert) Date: Thu, 20 Mar 2014 09:33:39 +0100 Subject: [PATCH] mtd: gpmi: make blockmark swapping optional In-Reply-To: <1395235406-13449-1-git-send-email-y> References: <1395235406-13449-1-git-send-email-y> Message-ID: <201403200933.39382.jbe@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Lothar, On Wednesday 19 March 2014 14:23:26 y at karo-electronics.de wrote: > With a flash-based BBT there is no reason to move the Factory Bad > Block Marker from the data area buffer (to where it is mapped by the > GPMI NAND controller) to the OOB buffer. Thus, make this feature > configurable via DT. This is required for the Ka-Ro electronics > platforms. > [...] How do you create the BBT the very first time with valuable data when the NAND already contains factory bad blocks? jbe -- Pengutronix e.K. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?| Juergen Beisert ? ? ? ? ? ? | Linux Solutions for Science and Industry ? ? ?| http://www.pengutronix.de/ | From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juergen Beisert Subject: Re: [PATCH] mtd: gpmi: make blockmark swapping optional Date: Thu, 20 Mar 2014 09:33:39 +0100 Message-ID: <201403200933.39382.jbe@pengutronix.de> References: <1395235406-13449-1-git-send-email-y> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1395235406-13449-1-git-send-email-y> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: linux-arm-kernel@lists.infradead.org Cc: Fabio Estevam , Mark Rutland , Russell King , Pawel Moll , Arnd Bergmann , Ian Campbell , Artem Bityutskiy , y@karo-electronics.de, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Huang Shijie , devicetree@vger.kernel.org, Rob Herring , linux-mtd@lists.infradead.org, Rob Landley , Kumar Gala , Brian Norris , David Woodhouse , Sascha Hauer , Shawn Guo , Lothar =?utf-8?q?Wa=C3=9Fmann?= List-Id: devicetree@vger.kernel.org SGkgTG90aGFyLAoKT24gV2VkbmVzZGF5IDE5IE1hcmNoIDIwMTQgMTQ6MjM6MjYgeUBrYXJvLWVs ZWN0cm9uaWNzLmRlIHdyb3RlOgo+IFdpdGggYSBmbGFzaC1iYXNlZCBCQlQgdGhlcmUgaXMgbm8g cmVhc29uIHRvIG1vdmUgdGhlIEZhY3RvcnkgQmFkCj4gQmxvY2sgTWFya2VyIGZyb20gdGhlIGRh dGEgYXJlYSBidWZmZXIgKHRvIHdoZXJlIGl0IGlzIG1hcHBlZCBieSB0aGUKPiBHUE1JIE5BTkQg Y29udHJvbGxlcikgdG8gdGhlIE9PQiBidWZmZXIuIFRodXMsIG1ha2UgdGhpcyBmZWF0dXJlCj4g Y29uZmlndXJhYmxlIHZpYSBEVC4gVGhpcyBpcyByZXF1aXJlZCBmb3IgdGhlIEthLVJvIGVsZWN0 cm9uaWNzCj4gcGxhdGZvcm1zLgo+IFsuLi5dCgpIb3cgZG8geW91IGNyZWF0ZSB0aGUgQkJUIHRo ZSB2ZXJ5IGZpcnN0IHRpbWUgd2l0aCB2YWx1YWJsZSBkYXRhIHdoZW4gdGhlIE5BTkQgCmFscmVh ZHkgY29udGFpbnMgZmFjdG9yeSBiYWQgYmxvY2tzPwoKamJlCgotLSAKUGVuZ3V0cm9uaXggZS5L LiDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoHwgSnVlcmdlbiBC ZWlzZXJ0IMKgIMKgIMKgIMKgIMKgIMKgIHwKTGludXggU29sdXRpb25zIGZvciBTY2llbmNlIGFu ZCBJbmR1c3RyeSDCoCDCoCDCoHwgaHR0cDovL3d3dy5wZW5ndXRyb25peC5kZS8gIHwKCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJu ZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRw Oi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755196AbaCTIbe (ORCPT ); Thu, 20 Mar 2014 04:31:34 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:49038 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754071AbaCTIbc convert rfc822-to-8bit (ORCPT ); Thu, 20 Mar 2014 04:31:32 -0400 From: Juergen Beisert Organization: Pengutronix e.K. To: linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] mtd: gpmi: make blockmark swapping optional Date: Thu, 20 Mar 2014 09:33:39 +0100 User-Agent: KMail/1.9.10 (enterprise35 0.20100827.1168748) Cc: y@karo-electronics.de, Arnd Bergmann , Artem Bityutskiy , Brian Norris , David Woodhouse , Fabio Estevam , Huang Shijie , Ian Campbell , Kumar Gala , Lothar =?utf-8?q?Wa=C3=9Fmann?= , Mark Rutland , Pawel Moll , Rob Herring , Rob Landley , Russell King , Sascha Hauer , Shawn Guo , devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org References: <1395235406-13449-1-git-send-email-y> In-Reply-To: <1395235406-13449-1-git-send-email-y> X-KMail-QuotePrefix: > MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 8BIT Content-Disposition: inline Message-Id: <201403200933.39382.jbe@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:5e26:aff:fe2b:7cc4 X-SA-Exim-Mail-From: jbe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Lothar, On Wednesday 19 March 2014 14:23:26 y@karo-electronics.de wrote: > With a flash-based BBT there is no reason to move the Factory Bad > Block Marker from the data area buffer (to where it is mapped by the > GPMI NAND controller) to the OOB buffer. Thus, make this feature > configurable via DT. This is required for the Ka-Ro electronics > platforms. > [...] How do you create the BBT the very first time with valuable data when the NAND already contains factory bad blocks? jbe -- Pengutronix e.K.                              | Juergen Beisert             | Linux Solutions for Science and Industry      | http://www.pengutronix.de/ |