[U-Boot] [U-Boot,v3] Ability to modify distro boot filename

[Tom Rini]

On Tue, Nov 06, 2018 at 12:23:53PM +0000, Martyn Welch wrote:

> Add in the ability to modify the distro boot filename. Whilst not
> immediately useful in normal usage, it allows an alternative
> configuration to be provided when other u-boot functionality is used, such
> as bootcount limit, to fallback to an alternative boot configuration. In
> this case we can follow the same boot path as for normal boot, just
> using an alternatively named configuration file.
> 
> For example, by providing the following `altbootcmd` when bootcount is in
> use:
> 
> altbootcmd=setenv boot_extlinx_conf extlinux-rollback.conf; \
> 	run distro_bootcmd
> 
> Signed-off-by: Martyn Welch <martyn.welch at collabora.co.uk>
> Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>

Applied to u-boot/master, thanks!

-- 
Tom
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