VAR-SOM-MX6 Yocto NAND Recovery

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 into the Nand-Flash 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 the supplied SD card to your Linux machine, run dmesg and see which device is added (i.e. /dev/sdX or /dev/mmcblk0)
Download mx6-som-nand-recovery-sd.v38.img.gz (or latest which is available on Variscite's FTP)
Version 38 and above support all VAR-SOM-MX6 SOM's version and VAR-SOM-SOLO.

$ gunzip mx6-som-nand-recovery-sd.v38.img.gz
$ sudo dd if=mx6-som-nand-recovery-sd.v38.img of=/dev/sdX bs=128k
Replace /dev/sdX with your true device, You can find it with dmesg.

Recover Nand Flash:

Insert the SD card into the SD/MMC slot of the custom board
Press and hold the boot-select button, power-off and power-on the board
The board will automatically boot into Linux from SD-Card

Flash from GUI

Press the right arrow on the upper right corner to change the desktop into Utilities.

Push FlashAndroid or FlashYocto icon.
This method only supports flashing into NAND.

Flash from command line

Login as root (no password)
From Linux command line, type: "nand-recovery.sh" (This will install Yocto/Linux on the NAND)
Help

nand-recovery.sh -h

               usage: /sbin/nand-recovery.sh options

               This script install Android(KitKat)/Yocto V6(Daisy)/Yocto V5(Dora) binaries in VAR-SOM-MX6 NAND.

               OPTIONS:
               -h                       Show this message
               -o <Android|Yocto|Dora>  OS type (defualt: Yocto).
               -m <Nand|Emmc>           Media type (defualt: Nand).

NAND:
- To install Android type: "nand-recovery.sh -o Android".
- To install Yocto Daisy type: "nand-recovery.sh -o Yocto".
eMMC:
- To install Android type: "nand-recovery.sh -o Android -m Emmc".
- To install Yocto Daisy type: "nand-recovery.sh -o Yocto -m Emmc".
NAND Dora
NAND:
- To install Android type: "nand-recovery.sh -o Dora".
Reboot and Unplug the SD card