[U-Boot] [PATCH 0/2] Add bootcount support to SPL

[Tom Rini]

On Fri, Sep 27, 2013 at 10:20:52PM -0300, Otavio Salvador wrote:
> On Fri, Sep 27, 2013 at 4:26 PM, Tom Rini <trini at ti.com> wrote:
> > The following patches depend on the series I posted earlier that adds
> > environment support to SPL as well as the series that converts the
> > davinci bootcount driver to support am335x as well.  The most obvious
> > issue to me as that as Scott pointed out with the last series, this
> > would be clearer Kconfig where we wouldn't need to introduce
> > CONFIG_SPL_BOOTCOUNT_SUPPORT and just re-use CONFIG_BOOTCOUNT_SUPPORT.
> > Other than that, I think things look good.  It may be possible to
> > re-jigger bootcount drivers to allow counting for both SPL and full
> > U-Boot to happen, if that's strongly desired but the way I see this
> > being used is to fall-back to a failsafe full U-Boot to do what's needed
> > there.
> 
> I think we need to count both; the SPL part solves the U-Boot failsafe
> but the full U-Boot is needed to failsafe the OS.

It's _possible_ we could split the counter up further, 16bit magic, 8
bit SPL count, 8 bit U-Boot count.  But I'm not sure if it's useful.
Looking at Stefan's patch, we count in SPL, and use altbootcmd in full
U-Boot to know we have failure rather than just booting fully via
U-Boot.

-- 
Tom
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