[U-Boot] Combine zImage and rootfs in single uImage

[Wolfgang Denk <wd@denx.de>]

Dear Grant Edwards,

In message <jpgbbm$1hk$1@dough.gmane.org> you wrote:
> Currently, I build a linux kernel that contains the root fileystem in
> the zImage file, when then gets converted into a uImage and booted
> from NAND flash.  This is all working fine, but having the kernel
> build depend on the rootfs build is a problem.
> 
> In another mailing list, somebody told me that if I was using U-Boot,
> I could build the zImage and rootfs separately and then combine them
> into a single uImage file for distribution.

The (deprecated) old style way (using legacy image format) is called
"multi-file images".

The modern, recommended way to do things like this is using FIT
images.

See the respective documentation.

Best regards,

Wolfgang Denk

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