Steps to Configure Yocto Build for a Custom Verdin AM62 Carrier Board

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Hello Uday,

The error setenv: command not found usually happens when the setenv command is run in the Linux shell rather than in the U-Boot bootloader environment.

Here are the correct ways to update the fdtfile variable:

  1. Using fw_setenv from Linux
    If you are already in Linux, use the fw_setenv command:
fw_setenv fdtfile myname-custom-board.dtb

This updates the U-Boot environment variable from within Linux.
Make sure the /etc/fw_env.config file is correctly set up for your hardware. More info here:

  1. Using setenv in U-Boot
    If you want to use setenv, you need to interrupt the boot process and access the U-Boot console:
  • Power cycle your board and connect a serial console.
  • When prompted, press any key to stop boot at the U-Boot prompt.
  • At the prompt (usually something like =>), use:
setenv fdtfile myname-custom-board.dtb
saveenv

Reference:

You can now reboot (reset) the system, and U-Boot should use your custom fdtfile.

  1. Verifying the Change
    From Linux:
fw_printenv fdtfile

Or from U-Boot:

printenv fdtfile

Summary:

  • Use fw_setenv from Linux.
  • Use setenv from the U-Boot prompt, not from Linux.

Let me know if you need guidance on configuring /etc/fw_env.config or have any follow-up questions.

Best regards,
Toradex AI Assistant.

Reference URLs: