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.. SPDX-License-Identifier: GPL-2.0+
Librem5
=======
U-Boot for the Purism Librem 5 development kit
Quick Start
-----------
- Build the ARM Trusted firmware binary
- Get DDR and HDMI firmware
- Build U-Boot
Get and Build the ARM Trusted firmware
--------------------------------------
Note: srctree is U-Boot source directory
Get ATF from: https://source.puri.sm/Librem5/arm-trusted-firmware
branch: librem5
.. code-block:: bash
$ make PLAT=imx8mq CROSS_COMPILE=aarch64-linux-gnu- bl31
$ cp build/imx8mq/release/bl31.bin $(builddir)
Get the ddr and display port firmware
-------------------------------------
.. code-block:: bash
$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.15.bin
$ chmod +x firmware-imx-8.15.bin
$ ./firmware-imx-8.15.bin
$ cp firmware-imx-8.15/firmware/hdmi/cadence/signed_hdmi_imx8m.bin $(builddir)
$ cp firmware-imx-8.15/firmware/ddr/synopsys/lpddr4*.bin $(builddir)
Build U-Boot
------------
.. code-block:: bash
$ export CROSS_COMPILE=aarch64-linux-gnu-
$ make librem5_devkit_defconfig
$ make ARCH=arm
Burn the flash.bin
------------------
Write the flash.bin to the eMMC at offset 32KB:
.. code-block:: bash
$ sudo dd if=flash.bin of=/dev/mmc0 bs=1024 seek=32 conv=notrunc
Reboot the devkit.
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