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H A DMakefile2405d09c4c8a1e4cd7744e5f10d1592bd974a939 Thu May 15 06:37:51 CDT 2014 Masahiro Yamada <yamada.m@jp.panasonic.com> build: support a new image u-boot-dtb.img

In SPL framework, SPL uses u-boot.img to load u-boot.bin.
Here,
u-boot.img = uImage header + u-boot.bin

To use OF control with a separate devicetree,
u-boot.dtb must be placed right after u-boot.bin.
In this case, u-boot-dtb.bin is generally used.
Here,
u-boot-dtb.bin = u-boot.bin + u-boot.dtb

We need u-boot-dtb.img to use both SPL framework
and separate OF control at the same time.
u-boot-dtb.img = uImage header + u-boot-dtb.bin

For example, Zynq boards already define all of
- CONFIG_SPL
- CONFIG_OF_CONTROL
- CONFIG_OF_SEPARATE

So, the support of u-boot-dtb.img is urgent.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>