[PATCH 3/3] env: sf: add support of command env erase

[Tom Rini]

On Tue, Feb 09, 2021 at 11:48:52AM +0100, Patrick Delaunay wrote:

> Add support of opts erase for env in SPI flash;
> this opts is used by command 'env erase'.
> 
> This command only fills the env offset by 0x0 (bit flip to 0) and
> the saved environment becomes invalid (with bad CRC).
> 
> It doesn't erase the sector here to avoid issue when the sector
> is larger than the env (i.e. embedded when
> CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE).
> 
> The needed sector erase will be managed in the next "env save" command,
> using the opt ".save", before to update the environment in SPI flash.
> 
> Signed-off-by: Patrick Delaunay <patrick.delaunay at foss.st.com>

Applied to u-boot/master, thanks!

-- 
Tom
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