[PATCH 1/2] bootstd: Add implementation for bootmeth rauc

[Martin Schwan]

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On Wed, 2025-01-29 at 10:03 -0600, Tom Rini wrote:
> On Wed, Jan 29, 2025 at 03:25:25PM +0100, Martin Schwan wrote:
> > Add a bootmeth driver which supports booting A/B system with RAUC
> > as
> > their update client.
> > 
> > Signed-off-by: Martin Schwan <m.schwan at phytec.de>
> > ---
> >  boot/Kconfig         |  11 ++
> >  boot/Makefile        |   1 +
> >  boot/bootmeth_rauc.c | 408
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 420 insertions(+)
> 
> I'm curious, what would be required to have this work for any block
> device, rather than just "mmc" ? Just a lack of time / testing / this
> is
> v1 and that's a future idea? Or is there something more fundamental
> required within bootstd/bootmeths ? Thanks!
> 

Besides MMC, RAUC supports updating SSDs and raw NAND flash [1].

I guess there should be very little to no adjustments necessary to
support SSDs (probably only adjust checks).

For raw NAND flash and using UBI volumes, this would require some
additional code calling the correct read operations, but is definitely
possible. I did not implement it yet because of lack of time and
verification, as you correctly guessed.

Network devices are not supported for obvious reasons.

Regards,
Martin

[1]:
https://rauc.readthedocs.io/en/latest/integration.html#partitioning-your-device
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