[U-Boot] [PATCH] libfdt: Add option to disable arch_fixup_fdt() calls

Alexander Graf
2016-06-09T14:40:37Z

On 06/09/2016 04:32 PM, Michal Simek wrote:
> On 9.6.2016 16:29, Alexander Graf wrote:
>> On 06/09/2016 04:23 PM, Michal Simek wrote:
>>> Disable arch_fixup_fdt() calls for cases where U-Boot shouldn't update
>>> memory setup in DTB file.
>>> One example of usage of this option is to boot OS with different memory
>>> setup than U-Boot use.
>>>
>>> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
>> Could we instead just have the board file provide a fixup? It could then
>> also fix up the efi memory map.
> Not sure what exactly you are asking for.
> Do you mean to add fixup function to board file and overwrite default one?

You have to touch some other code anyway to make this work with a
particular board, right? In that case, you can as well add a function to
the board file that explicitly provides a different, known good memory map.

Can you have a weaker overload? Basically I would like to have a board
provide arch_fixup_fdt() which would override the one in bootm-fdt.c.
But we can also rename arch_fixup_fdt() in bootm-fdt.c to
board_fixup_fdt() function, declare it weak and have arch_fixup_fdt()
call that.

Alex