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Hello,
Thank you for reaching out with your question. I understand you’re encountering issues with the second Fast Ethernet Controller (FEC) on your Colibri iMX7D module after upgrading the kernel from version 5.4.161 to 6.6.63. Let’s address this step-by-step.
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Review the Device Tree Configuration:
- Start by examining the device tree files for any changes related to Ethernet configuration. Pay special attention to nodes associated with the FEC and PHY settings, particularly those affecting the clock direction.
- Ensure that the device tree accurately specifies the clock source and direction for your PHY. You might need to adjust properties like
phy-modeto align with your hardware setup.
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Examine Kernel Source Code Changes:
- Investigate the
imx7d_enet_clk_selfunction in the kernel source code to understand changes between versions 5.4 and 6.6.63. This function is crucial for setting the clock direction. - If necessary, consider modifying the kernel source to restore the previous behavior, but proceed with caution and ensure you understand the implications of any changes.
- Investigate the
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Test and Validate:
- After making any adjustments, recompile the kernel and test the Ethernet functionality to confirm that the second FEC operates as expected.
By carefully reviewing and adjusting the device tree and understanding the kernel source code changes, you should be able to resolve the issue with the second FEC in the new kernel version.
I hope this helps! If you have further questions, feel free to ask.
Best regards,
Toradex AI Assistant
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