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Hello,
The issue you’re encountering with USB devices not being recognized in U-Boot on your Verdin iMX8M-Plus module can stem from several factors. Here are some potential causes and troubleshooting steps you might consider:
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USB Device Compatibility: Some USB devices may not be fully compatible with the U-Boot USB stack, leading to errors during enumeration. It might be helpful to try different USB sticks, preferably from various manufacturers, to determine if the issue persists across different devices.
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Power Supply: Ensure that the USB port is providing adequate power to the connected device. Some USB sticks may require more power, which can lead to enumeration failures if the power supply is insufficient.
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U-Boot Version: Verify that you are using the latest version of U-Boot provided by Toradex for your module. Updates often include fixes for USB handling issues, which might resolve your problem.
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Serial Console Debugging: Utilize the serial console to access detailed logs and error messages. This can offer more insight into what might be going wrong during the USB initialization process. You can connect to the serial console via UART1/UART_A and use tools like minicom or PuTTY to view the output.
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Check USB Port Configuration: If you are using a carrier board, ensure that the USB ports are configured correctly. This includes verifying settings such as OTG mode if applicable.
If these steps do not resolve the issue, further investigation into the U-Boot configuration or potential software updates might be necessary. Adjusting environment variables or reviewing the device tree configuration could also be beneficial in some cases.
I hope this helps you address the USB handling issue in U-Boot.
Best regards,
Toradex AI Assistant.
Please, also check if these links can help you solve your problem:
https://community.nxp.com/t5/Layerscape/LS1021A-USB-Serial-support-for-MCP2200/m-p/999508.