imx91_frdm

U-Boot for the NXP i.MX91 11x11 FRDM Board

Quick Start

  • Get and Build the ARM Trusted firmware

  • Get the DDR firmware

  • Get ahab-container.img

  • Build U-Boot

  • Boot from the SD card

  • Boot using USB serial download (uuu)

Get and Build the ARM Trusted firmware

Note: srctree is U-Boot source directory Get ATF from: https://github.com/nxp-imx/imx-atf/ branch: lf_v2.10

$ unset LDFLAGS
$ make PLAT=imx91 bl31
$ cp build/imx91/release/bl31.bin $(srctree)

Get the DDR firmware

$ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.21.bin
$ chmod +x firmware-imx-8.21.bin
$ ./firmware-imx-8.21.bin
$ cp firmware-imx-8.21/firmware/ddr/synopsys/lpddr4*.bin $(srctree)

Get ahab-container.img

$ wget  https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-ele-imx-1.3.0-17945fc.bin
$ chmod +x firmware-ele-imx-1.3.0-17945fc.bin
$ ./firmware-ele-imx-1.3.0-17945fc.bin
$ cp firmware-ele-imx-1.3.0-17945fc/mx91a0-ahab-container.img $(srctree)

Build U-Boot

$ export CROSS_COMPILE=aarch64-poky-linux-
$ make imx91_11x11_frdm_defconfig or imx91_11x11_frdm_inline_ecc_defconfig
$ make

  • Inline ECC is to enable DDR ECC feature with imx91_11x11_frdm_inline_ecc_defconfig Enable ECC will reduce DDR size by 1/8. For 1GB DRAM, available size will be 896MB.

Burn the flash.bin to MicroSD card offset 32KB:

$ dd if=flash.bin of=/dev/sd[x] bs=1k seek=32; sync

Boot from the SD card

  • Configure SW1 boot switches to SD boot mode: 0011 SW1[3:0] - (“USDHC2 4-bit SD3.0” Boot Mode)

  • Insert the SD card in the SD slot (P13) of the board.

  • Connect a USB Type-C cable into the P16 Debug USB Port and connect using a terminal emulator at 115200 bps, 8n1. The console will show up at /dev/ttyACM0.

  • Power on the board by connecting a USB Type-C cable into the P1 Power USB Port.

Boot using USB serial download (uuu)

  • Configure SW1 boot switches to serial download boot mode: 0001 SW1[3:0] - (“Serial downloader (USB)” Boot Mode)

  • Plug USB Type-C cable into the P2 device port.

  • Connect a USB Type-C cable into the P16 Debug USB Port and connect using a terminal emulator at 115200 bps, 8n1. The console will show up at /dev/ttyACM0.

  • Power on the board by connecting a USB Type-C cable into the P1 Power USB Port.

  • Use NXP Universal Update Utility NXP Universal Update Utility to boot or flash the device. E.g. following command can be used to flash an image onto the eMMC storage:

$ uuu -V -b emmc_all <image file>