Building kernel for more than one SoC

[linux@arm.linux.org.uk (Russell King - ARM Linux)]

On Mon, Aug 11, 2014 at 08:43:35PM +0000, Grant Edwards wrote:
> On 2014-08-11, Robert Nelson <robertcnelson@gmail.com> wrote:
> >> Now it's up to somebody else to decide if the price difference between
> >> a G20 and G25 is worth the engineering time to upgrade U-Boot and
> >> Linux kernel to versions that know about device trees...
> >
> > http://cateee.net/lkddb/web-lkddb/ARM_APPENDED_DTB.html
> 
> Interesting.  That would still require modifying U-Boot so that at
> run-time it detects the SoC type and appends the proper DTB to the
> kernel image, but it that may be less work than "real" DTB support in
> U-Boot.

The idea of that feature is:

- You take the kernel zImage
- You take the appropriate dtb file
- You concatenate the dtb file into the zImage
- You run mkimage on the resulting combined image to create the special
  uboot format file for uboot to load
- You use it with uboot as you have done in the past with non-DT kernels.

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