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Tobias Waldekranz 0b643f1a78 uboot: Add boot menu
Generate a boot menu, accessible with C-c during a short window, where
a user can interactively select a custom boot source and/or trigger a
factory reset of the device.

With this in place, we should always be able to unbrick a device, as
the image can be fed over the network, and local data can be ignored
by opting in to a factory reset.
2024-06-17 14:59:27 +02:00

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if button dev-mode; then
setenv dev_mode yes
fi