VAR-SOM-MX6 Yocto NAND Recovery
From Variscite Wiki
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