[U-Boot] [PATCH] efi_loader: Use system fdt as fallback

[Alexander Graf]

On 04/13/2016 02:58 PM, Andreas Färber wrote:
> Am 11.04.2016 um 16:55 schrieb Alexander Graf:
>> When the user did not pass any device tree or the boot script
>> didn't find any, let's use the system device tree as last resort
>> to get something the payload (Linux) may understand.
>>
>> This means that on systems that use the same device tree for U-Boot
>> and Linux we can just share it and there's no need to manually provide
>> a device tree in the target image.
>>
>> While at it, also copy and pad the device tree by 64kb to give us
>> space for modifications.
>>
>> Signed-off-by: Alexander Graf <agraf at suse.de>
> Tested-by: Andreas Färber <afaerber at suse.de>
>
> It definitely avoids a warning message. However, it does not always
> allow Linux to actually boot, e.g. on jetson-tk1 (patch sent).

We could give the user a warning in the fallback case as well, but 
ideally I'd like to move to a model where all device trees really are 
interchangable and work with every component. So then we would warn the 
user about the preferred default case. I'm not sure that's a great idea.


Alex