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.. SPDX-License-Identifier: GPL-2.0+
imx8mn_var_som
==============
U-Boot for the Variscite VAR-SOM-MX8MN Symphony evaluation board
Quick Start
-----------
- Build the ARM Trusted firmware binary
- Get firmware-imx package
- Build U-Boot
- Boot
Get and Build the ARM Trusted firmware
--------------------------------------
Note: srctree is U-Boot source directory
Get ATF from: https://github.com/ARM-software/arm-trusted-firmware
tag: v2.5
.. code-block:: bash
$ make PLAT=imx8mn IMX_BOOT_UART_BASE=0x30a60000 bl31
$ cp build/imx8mn/release/bl31.bin $(srctree)
Get the ddr firmware
--------------------
.. code-block:: bash
$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.9.bin
$ chmod +x firmware-imx-8.9.bin
$ ./firmware-imx-8.9
$ cp firmware-imx-8.9/firmware/ddr/synopsys/ddr4*.bin $(srctree)
Build U-Boot
------------
.. code-block:: bash
$ export CROSS_COMPILE=aarch64-linux-gnu-
$ make imx8mn_var_som_defconfig
$ make
Burn the flash.bin to MicroSD card offset 32KB:
.. code-block:: bash
$ dd if=flash.bin of=/dev/sd[x] bs=1024 seek=32 conv=notrunc
Boot
----
Set Boot switch to SD boot
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