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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2001:8b0:10b:1:d65d:64ff:fe57:4e05 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.8 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: imx6 nand: dbbt version/layout X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) Hi, I'm in the process of fixing up imx-kobs to support - boot configuration dumps - boot stream extracts/updates on iMX6QDL using the GPMI-NAND interface, as provided by some more "recent" kernels. I updated barebox on the NAND flash storage using another instance of barebox. Now it turns out that the dbbt version used (i.e. written) by barebox and supported by imx-kobs (as it was) is not documented in the i.MX6 QDL reference manual. Barebox uses[0] DBBT version 0x1000000, while the reference manual describes (i.MX6DQRM Rev 3., section 8.5.2.4) layout version 0x1. Besides that, the reference manual apparently does not describe the field `BBMarkerPhysicalOffsetInSpareData` at the end of the FCB structure. Yet again, imx-kobs and barebox are reading/writing it. So I'm wondering which behavior is correct? [0] https://git.pengutronix.de/cgit/barebox/tree/common/imx-bbu-nand-fcb.c?id=af0f068a6edad45b033e772056ac0352e1ba3613#n675 Best regards, Leif This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. 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