The result of this work was a tool called utp_com which can be used with imx_usb to flash i.MX6 based hardware from Linux environment. As we are talking about Linux we also decided to make the tool publicly available.
Example commands how a file is copied to the target device and then written to a flash device below:
utp_com -d /dev/sdb -c "send" -f u-boot.bin
utp_com -d /dev/sdb -c "$ dd if=\$FILE of=/dev/mtd0 bs=512"
Code is under GNU GPL v2.0 license, and can be found from: http://github.com/ixonos/utp_com.
We hope you find it as useful as we do!
Teemu Piiroinen, SW Specialist, Ixonos Plc