Dear twebb, In message <[email protected]> you wrote: > I've cross-compiled and am running fw_printenv on an ARM system using > linux-2.6.28. The u-boot environment is kept in SPI-based NOR flash. > The configuration within fw_env.h is... ... > //#define CONFIG_FILE "/etc/fw_env.config" > //#define HAVE_REDUND /* For systems with 2 env sectors */ > #define DEVICE1_NAME "/dev/mtd7" > #define DEVICE1_OFFSET 0x00080000 > #define ENV1_SIZE 0x00020000 > #define DEVICE1_ESIZE 0x00010000
This is 512, 128 and 64 KiB, respective. > I get the following error when executing fw_printenv... > > Read error on /dev/mtd7: Success > > Adding some debug, I've determined that the error results from the > read of mtd7 returning 0 bytes read. > > *** mtdinfo.type = NOR > *** Read 0 bytes, readlen = 131072, seek = 524288 > Read error on /dev/mtd7: Success This is an attempt to read 128 KiB at offset 512 KiB, as configured. > However, using the command... > > dd if=/dev/mtd7 of=/tmp/dummy bs=512 count=1 skip=1024 This is reading 0.5 KiB at offset 512 KiB. > dummy contains the u-boot environment area as I would expect. Any > ideas why the read is returning 0? Maybe reading 512 bytes is possible with your driver, but reading 128 KiB is not? Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [email protected] The only perfect science is hind-sight. _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
