Kontron AM4140 U-Boot Bootloader - Manual (Page 42)

U-Boot Usage AM4140 U-Boot Bootloader
Page 42 ID 1052-0281, Rev. 1.0
P R E L I M I N A R Y
6.5 Using the Onboard NAND Flash
The onboard NAND Flash is supported with the “ubi” filesystem. The access is read only. Thus,
the filesystem and its contents must be prepared with Linux first.
As a prerequisite, the environment variables “mtdids” and “mtdparts” must be set correctly.
“mtdids” identifies the NAND chip to use while “mtdparts” defines the partitions.
Example:
This defines the first NAND chip (nand0) to be used with the name “chip1”. The chip contains
one partition “all” which occupies the whole chip.
The next command sets the partition “all” to be used with the “ubi” layer:
Now, an “ubi” volume can be mounted; in this example volume “boot”:
After the volume is mounted, its contents can be listed:
or a file loaded, in this case “kernel.bin” to address 0x100000:
setenv mtdids nand0=chip1
setenv mtdparts mtdparts=chip1:-(all)
ubi part all
ubifsmount boot
ubifsls
ubifsload 100000 kernel.bin