Transclusion: CL-SOM-iMX7: U-Boot: Firmware Update

Updating Firmware on the SPI flash

CL-SOM-iMX7 firmware can be updated from an SD card, USB storage, or using network TFTP download. All methods are performed from the U-Boot command line and include following common steps:

1. Loading binary image from the selected media to the CL-SOM-iMX7 DRAM
2. Flashing image to the on-board SPI flash

Common preparation steps

• Set common parameters:

CL-SOM-iMX7 # setenv ubootsize 0x90000; setenv loadaddr 0x80800000

Updating from SD card

• Copy the firmware binary image cl-som-imx7-firmware from U-Boot package for CL-SOM-iMX7 to the root directory of the SD card.
• Insert the MMC/SD card into the SD socket (P9) on the SBC-iMX7.
• Start the U-Boot MMC subsystem:

CL-SOM-iMX7 # mmc dev 0
CL-SOM-iMX7 # mmc rescan

• Check that the storage device is ready:

CL-SOM-iMX7 # ls mmc 0

• Load the firmware binary into the memory:

CL-SOM-iMX7 # load mmc 0 ${loadaddr} cl-som-imx7-firmware

• Proceed to Flashing images section

Updating from USB storage

• Copy the firmware binary image cl-som-imx7-firmware from U-Boot package for CL-SOM-iMX7 to the root directory of the USB storage device.
• Plug the USB storage to either port on the dual USB host connector P6 of the SBC-iMX7.
• Start the U-Boot USB subsystem:

CL-SOM-iMX7 # usb start

• Check that the storage device is ready:

CL-SOM-iMX7 # ls usb 0

• Load the firmware binary into the memory:

CL-SOM-iMX7 # load usb 0 ${loadaddr} cl-som-imx7-firmware

• Proceed to Flashing images section

Updating from TFTP server

• Setup a TFTP server
• Put the firmware binary image cl-som-imx7-firmware from U-Boot package for CL-SOM-iMX7 in the root directory of the TFTP server
• Setup U-Boot networking:

for dynamic IP configuration:

CL-SOM-iMX7 # dhcp

or for static IP configuration:

CL-SOM-iMX7 # setenv ipaddr <ip address>

• Setup the TFTP server ip address:

CL-SOM-iMX7 # setenv serverip <server ip>

• Download the firmware binary into the memory:

CL-SOM-iMX7 # tftpboot ${loadaddr} cl-som-imx7-firmware

• Proceed to Flashing images section

Flashing images

• Make U-Boot probe the on-board SPI flash:

CL-SOM-iMX7 # sf probe

• Erase the on-board SPI flash:

CL-SOM-iMX7 # sf erase 0 ${ubootsize}

• Write the firmware image into the on-board SPI flash:

CL-SOM-iMX7 # sf write ${loadaddr} 0 ${ubootsize}

• Reset the CL-SOM-iMX7 evaluation platform.

Default environment

It is recommended to set default environment after updating the U-Boot version:

CL-SOM-iMX7 # env default -a
CL-SOM-iMX7 # saveenv