The SPL and u-boot image, must be flashed on NAND using the NXP <code>kobs-ng</code> utility. This tool is required for writing correct information needed by bootrom to identify the NAND as a boot device.
'''N.B.''' for programming the second stage, the <code>nandwrite</code> command has to identify a proper mtd part witch correct size. For this reason, the ''mtdparts'' variable has to be modified for writing the complete u-boot image.
The following steps are therefore necessary:
# execute '''kobs-ng''' passing the parameters for flashing the SPL on NAND
# execute '''nandwrite''' to flash uboot image on NAND