[PATCH 1/3] imx8mn: evk: add README

[Peng Fan]

Add a README for users to build a workable image.

Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 board/freescale/imx8mn_evk/README | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 board/freescale/imx8mn_evk/README

diff --git a/board/freescale/imx8mn_evk/README b/board/freescale/imx8mn_evk/README
new file mode 100644
index 0000000000..12754c7999
--- /dev/null
+++ b/board/freescale/imx8mn_evk/README
@@ -0,0 +1,37 @@
+U-Boot for the NXP i.MX8MM EVK board
+
+Quick Start
+===========
+- Build the ARM Trusted firmware binary
+- Get ddr firmware
+- Build U-Boot
+- Boot
+
+Get and Build the ARM Trusted firmware
+======================================
+Note: srctree is U-Boot source directory
+Get ATF from: https://source.codeaurora.org/external/imx/imx-atf
+branch: imx_4.19.35_1.1.0
+$ make PLAT=imx8mn bl31
+$ cp build/imx8mn/release/bl31.bin $(srctree)
+
+Get the ddr firmware
+=============================
+$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.0.bin
+$ chmod +x firmware-imx-8.0.bin
+$ ./firmware-imx-8.0
+$ cp firmware-imx-8.0/firmware/ddr/synopsys/ddr4*.bin $(srctree)
+
+Build U-Boot
+============
+$ export CROSS_COMPILE=aarch64-poky-linux-
+$ make imx8mn_ddr4_evk_defconfig
+$ export ATF_LOAD_ADDR=0x960000
+$ make flash.bin
+
+Burn the flash.bin to MicroSD card offset 32KB
+$sudo dd if=flash.bin of=/dev/sd[x] bs=1024 seek=32
+
+Boot
+====
+Set Boot switch to SD boot
-- 
2.16.4