[U-Boot] [PATCH 16/17] sunxi: Store the device tree name in the SPL header

[André Przywara]

On 08/03/17 21:01, Simon Glass wrote:

Hi Simon,

many thanks for the review, finally found some time to look at this.
I have finished the needed rework (including documentation) and will
post something after some testing and some sleep ;-)

> On 28 February 2017 at 19:25, Andre Przywara <andre.przywara at arm.com> wrote:
>> From: Siarhei Siamashka <siarhei.siamashka at gmail.com>
>>
>> This patch updates the mksunxiboot tool to optionally add
>> the default device tree name string to the SPL header. This
>> information can be used by the firmware upgrade tools to
>> protect users from harming themselves by trying to upgrade
>> to an incompatible bootloader.
>>
>> The primary use case here is a non-removable bootable media
>> (such as NAND, eMMC or SPI flash), which already may have
>> a properly working, but a little bit outdated bootloader
>> installed. For example, the user may download or build a
>> new U-Boot image for "Cubieboard", and then attemept to
>> install it on a "Cubieboard2" hardware by mistake as a
>> replacement for the already existing bootloader. If this
>> happens, the flash programming tool can identify this
>> problem and warn the user.
>>
>> The size of the SPL header is also increased from 64 bytes
>> to 96 bytes to provide enough space for the device tree name
>> string.
>> [Andre: split patch to remove OF_LIST hash feature]
>>
>> Signed-off-by: Siarhei Siamashka <siarhei.siamashka at gmail.com>
>> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
>> ---
>>  arch/arm/include/asm/arch-sunxi/spl.h | 19 +++++++++++---
>>  include/configs/sunxi-common.h        |  8 +++---
>>  scripts/Makefile.spl                  |  3 ++-
>>  tools/mksunxiboot.c                   | 49 ++++++++++++++++++++++++++++++++---
>>  4 files changed, 67 insertions(+), 12 deletions(-)
> 
> Can this code move into mkimage as a new image type? This is what
> rockchip does. It feels like this tool should be subsumed. If that
> doesn't work, perhaps binman?

Interesting, I wasn't aware that mkimage can do more than legacy and
FIT. Indeed that sounds useful, especially as mkimage seems to be
packaged separately and is available in some distros.

So I hacked something up, but that needs some more love.
I am tempted to drop (or split) this patch from this series for now,
since this extension here and the move to mkimage could be treated
separately from the SPL FIT code.

Cheers,
Andre.