VAR-SOM-MX6 Yocto NAND Recovery

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As an easy and fast way to recover the VAR-SOM-MX6 NAND flash, Variscite provides a recovery SD card image that can be used to install the pre-built U-Boot, Linux kernel and the UBI file system. This SD card image includes a script (nand-recovery.sh) that installs all the boot images and root file-system.

Preparing rescue SD-Card:

  • Plug-in supplied SD card to your Linux machine, run dmesg and see what device is added (i.e. /dev/sdX or /dev/mmcblk0)
  • gunzip mx6qd-som-nand-recovery-sd.v22_1.img.gz (Available from Variscite's FTP)
  • sudo dd if=mx6qd-som-nand-recovery-sd.v22_1.img of=/dev/sdX bs=128k

Recover Nand Flash:

  • Insert the SD card into the SD/MMC slot of the custom board
  • Press and hold the boot select button and power-on the board
  • The board will automatically boot into u-boot
  • in u-boot prompt enter: "nand erase"
  • Press and hold the boot select button, power-off and power-on the board
  • The board will automatically boot into Linux
  • Login as root (no password)
  • From Linux command line, type: "nand-recovery.sh" (This will install Linux on the NAND)
  • To install Android type: "nand-recovery.sh -o Android".
  • Unplug the SD card and reboot