Hi, Boot enable setting is enable with writting PARTITION_CONFIG ext csd. But the kernel also write it in mmc_blk_part_switch. This lead to weird result : ~ # mmc_utils extcsd read /dev/mmcblk0 | grep PARTITION_CONFIG Boot configuration bytes [PARTITION_CONFIG: 0x00] ## no boot partition enabled ~ # mmc_utils boot enable 1 1 /dev/mmcblk0 ~ # mmc_utils extcsd read /dev/mmcblk0 | grep PARTITION_CONFIG Boot configuration bytes [PARTITION_CONFIG: 0x48] ## boot partition enabled ~ # dd if=/dev/mmcblk0boot0 of=/dev/null count=1 1+0 records in 1+0 records out ~ # mmc_utils extcsd read /dev/mmcblk0 | grep PARTITION_CONFIG Boot configuration bytes [PARTITION_CONFIG: 0x01] ## kernel erased your boot partition config. This is because the kernel have a cache of ext_csd in card->ext_csd and is not aware of modification done by the mmc_utils. Matthieu -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
