IOT-GATE-iMX8 and SBC-IOT-iMX8: U-Boot: Update

Introduction

U-boot version 2.0 or above is required for running the latest Debian and Yocto images.

Check U-Boot version

• U-Boot version and compilation date are displayed during boot:
  

U-Boot 2020.04-iot-gate-imx8-2.0 (Sep 03 2020 - 13:43:49 +0300)

• U-Boot version can be retrieved with the version command:

IOT-GATE-iMX8 => version
U-Boot 2020.04-iot-gate-imx8-2.0 (Sep 03 2020 - 13:43:49 +0300)

aarch64-linux-gnu-gcc (Linaro GCC 7.5-2019.12) 7.5.0
GNU ld (Linaro_Binutils-2019.12) 2.28.2.20170706

Updating U-Boot

• Download the latest U-Boot binary image from the u-boot section of the IOT-GATE-iMX8 resources.
• Extract the image archive file.
• Copy the image (iot-gate-imx8_uboot-image_2.1.bin) to the first partition of a USB flash drive.

The partition can be formatted either ext2/3/4 or FAT file system.

• Plug the USB flash drive into the front panel USB port (located near the power button).
• Restart the IOT-GATE-iMX8.
• Stop the boot process during the U-Boot auto-boot countdown.
• Write the new image onto internal storage

If the original U-Boot version is 1.X, use the following commands:

IOT-GATE-iMX8 => usb reset
IOT-GATE-iMX8 => load usb 0 ${loadaddr} iot-gate-imx8_uboot-image_2.1.bin && mmc dev 1 1 && mmc write ${loadaddr} 0x42 0xB00
IOT-GATE-iMX8 => reset

If the original U-Boot version is 2.0 or above, use the following commands :

IOT-GATE-iMX8 => usb reset
IOT-GATE-iMX8 => load usb 0 ${loadaddr} iot-gate-imx8_uboot-image_2.1.bin && mmc dev 2 1 && mmc write ${loadaddr} 0x42 0xB00
IOT-GATE-iMX8 => reset