[U-Boot] [PATCH 1/1]: environment in eMMC boot partition

[Tom Rini]

On Wed, Oct 05, 2016 at 01:28:07PM -0700, Sergey Kubushyn wrote:

> This allows to place U-Boot environment into eMMC boot partition thus
> saving space on user partition for the OS (or whatever.) When booting
> off of eMMC many (all?) MCUs can use dedicated boot0/boot1 partitions
> to boot so U-Boot (or SPL) is written to one (or both) such partitions.
> When such boot configuration is used it makes sense to place environment
> in the same partition where the U-Boot itself is so the entire user
> partition is available for the OS.
> 
> It might be not well polished yet but it is a simple patch that can be
> reworked later.
> 
> It uses 4 Kconfig variables right now which probably belong to the board
> Kconfig. Those are:
> 
> CONFIG_ENV_IN_EMMC_BOOT -- tells that environment is in eMMC boot
>  partition if defined
> 
> CONFIG_EMMC_ENV_PART -- tells which boot partition environment should be
>  stored in (either 1 or 2)
> 
> CONFIG_EMMC_BOOT_PART -- which boot partition will be used by eMMC to
>  read U-Boot/SPL binary for boot protocol (either 1 or 2.) That can be
>  different from the environment partition
> 
> CONFIG_EMMC_BOOT_ACK -- tells that eMMC should provide boot ACKs if
>  defined
> 
> Here is an excerpt from actual board Kconfig:

I think what's missing is that in the other cases where we do
environment in the eMMC boot partitions we don't need the boot ack part.
Can you see if the existing hooks work, when you add in something for
boot ack?

-- 
Tom
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