From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Babic Date: Fri, 25 Nov 2011 08:12:55 +0100 Subject: [U-Boot] mx28: Saving env vars on MMC In-Reply-To: References: Message-ID: <4ECF3FF7.40502@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 25/11/2011 03:05, Fabio Estevam wrote: > Hi, > > I am trying to save environment variables on a SD card of a MX28EVK board. > > 'save' command reports no errors, but if I reboot the board then the > board no longer boots. > > In order to recover the boot, I need to reformat the SD card and > reflash the u-boot.sd image. > > I am trying the following configuration taken from FSL U-boot: > > /* > * MMC Driver > */ > #define CONFIG_ENV_IS_IN_MMC > #define CONFIG_ENV_OFFSET 0x400 I do not know the details, but this offset is very low and it seems taken from other i.MX (MX5). This can overwrite your U-Boot. The write_env() function in env_mmc.c converts the offset in a block number, and this means you are writing at the block #2. Because 1 Block=512 byte, can you try to move the offset to a very high block ? > #define CONFIG_ENV_SIZE 0x20000 - 0x400 This seems too much... Stefano -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de =====================================================================