On Tue, 13 Nov 2012, Mark Jackson wrote:

> On 06/11/12 09:47, Mark Jackson wrote:
>
> > That works ... great !!
> > 
> > But now I'm confused, since I thought the DTB was appended to the uImage 
> > file.

The DTB is appended to the zImage file.  You then need to convert the 
product of the concatenation to uImage format.

So ...

> > I have the following in my .config:-
> > 
> > ARM_ATAG_DTB_COMPAT=y
> > ARM_APPENDED_DTB=y
> > ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER=y
> > 
> > And then I create my uImage file using:-
> > 
> > $ make -j 8 ARCH=arm CROSS_COMPILE=arm-linux- uImage
> > $ make -j 8 ARCH=arm CROSS_COMPILE=arm-linux- am335x-bone.dtb

instead of this:

> > $ cat arch/arm/boot/uImage arch/arm/boot/am335x-bone.dtb > 
> > arch/arm/boot/uImage-dtb.am335x-bone
> > $ cp arch/arm/boot/uImage-dtb.am335x-bone /media/boot/uImage

something like this is what you need to do instead:

$ cat arch/arm/boot/zImage arch/arm/boot/am335x-bone.dtb > 
arch/arm/boot/zImage-dtb.am335x-bone
$ scripts/mkuboot.sh -A arm -O linux -C none  -T kernel -a 0x80008000 -e 
0x80008000 -n 'Linux' -d arch/arm/boot/zImage-dtb.am335x-bone 
arch/arm/boot/uImage-dtb.am335x-bone

> > Do you now have to load the DTB as a separate file ?
> > 
> > Or should the appended DTB still work ?

Appended DTBs work fine on the testbed here.


- Paul
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