[U-Boot] [PATCH 00/12] SPL mmc refactor and alternate boot device feature

[Otavio Salvador]

On Thu, Oct 22, 2015 at 10:01 AM, Nikita Kiryanov <nikita at compulab.co.il> wrote:
> This series has two parts: patches 1-7 perform refactors aimed at reducing the
> ifdef complexity of SPL mmc code (and some nand as well). This refactor also
> addresses a few design issues I noticed while working on the refactor.
>
> The rest of the series introduces a new SPL feature that allows board code to
> define a list of boot devices that SPL will try before failing (instead of the
> only one device it attempts now). This feature is useful for implementing
> fallbacks, as well as reacting to bootROM sequences. For example:
>
> On CM-FX6, if boot from the alternate boot device (MMC) fails, the bootROM
> proceeds to try boot from SPI flash. If the SPI flash boot is succesful, SPL
> will still try to load U-Boot from MMC, instead of from the actual boot device
> (SPI flash), and probably fail and hang. The alternate boot feature makes it
> possible for SPL to follow the MMC boot attempt with boot from the SPI flash.
> The CM-FX6 based miniature PC Utilite depends on this capability for its SPI
> flash boot to work, since SPI flash boot is only attempted if MMC boot fails.
>
> This series was tested on CM-FX6 and compile tested for arm and powerpc.

Thanks a lot for working on this; it does improves the SPL framework
and extends its feature set. One thing I missed is the patches to
rework the current boards removing the defines the serie drops and a
proper documentation in the README files.

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
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