[U-Boot] [PATCHv3] env: enable accessing the environment in an EXT4 partition

[Tom Rini]

On Mon, Nov 27, 2017 at 06:45:35PM +0100, Jorge Ramirez-Ortiz wrote:
> the following commit enables accessing the environment in an ext4
> partition. In order to do that, some definitions need to be added to
> include/configs/board_x.h file.
> 
> For example to store the environment in a file named "/uboot.env" in MMC
> "0", where partition "1" contains the EXT4 filesystem, you should define:
> 
>   EXT4_ENV_DEVICE_AND_PART        "0:1"
>   EXT4_ENV_INTERFACE              "mmc"
>   EXT4_ENV_FILE                   "/uboot.env"

We have examples of these kind of configurations in Kconfig today,
please add them as well so the feature can be fully used, thanks!

-- 
Tom
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