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.. SPDX-License-Identifier: GPL-2.0+
.. sectionauthor:: Andy Shevchenko <>
Build Instructions for U-Boot as main bootloader
Simple you can build U-Boot and obtain u-boot.bin::
$ make edison_defconfig
$ make all
Updating U-Boot on Edison
By default Intel Edison boards are shipped with preinstalled heavily
patched U-Boot v2014.04. Though it supports DFU which we may be able to
1. Prepare u-boot.bin as described in chapter above. You still need one
more step (if and only if you have original U-Boot), i.e. run the
following command::
$ truncate -s %4096 u-boot.bin
2. Run your board and interrupt booting to U-Boot console. In the console
=> run do_force_flash_os
3. Wait for few seconds, it will prepare environment variable and runs
DFU. Run DFU command from the host system::
$ dfu-util -v -d 8087:0a99 --alt u-boot0 -D u-boot.bin
4. Return to U-Boot console and following hint. i.e. push Ctrl+C, and
reset the board::
=> reset