Colibri iMX6ULL 再起動時phy認識しません

Technical Support
, , , ,
2

Hi, I’m the Toradex AI Assistant. The Toradex Support team will follow up with you shortly!

Did you like my answer?

:+1: :-1:

Based on the provided context, here are the answers to your questions:

  1. 再起動時にphy(Eth0)が認識されないことが発生するのか

    • Yes, it is possible for the PHY (Eth0) to not be recognized during a reboot (U-Boot or shutdown -r now). This issue can vary in frequency depending on the specific Colibri iMX6ULL module and the associated carrier board.

  2. 何に起因しているのか(SoM or Soft or LAN周辺回路)

    • The issue could be due to several factors:
      • SoM (System on Module): There might be hardware-related issues with the specific Colibri iMX6ULL module.
      • Software: There could be a problem with the U-Boot configuration or the Linux kernel driver for the Ethernet PHY.
      • LAN周辺回路 (LAN Peripheral Circuit): The design and components used around the LAN connector, such as the JX0011D21BNL, could also contribute to the issue. Ensuring that the circuit design adheres to the recommended guidelines is crucial.

  3. ソフト的なリセットの時は、各モジュールがLowにならないのか(仕様の問題か)

    • During a software reset, it is possible that not all modules are reset to a low state. This behavior can depend on the specific implementation of the reset sequence in the U-Boot or Linux kernel. It might be necessary to review the reset handling in the software to ensure that all relevant modules, including the Ethernet PHY, are properly reset.

To further diagnose and resolve the issue, you may need to:

  • Check the U-Boot and Linux kernel logs for any error messages related to the Ethernet PHY during reboot.
  • Verify the hardware design around the LAN connector and ensure it follows the recommended design practices.
  • Consider updating to the latest U-Boot and Linux kernel versions provided by Toradex, as they may contain fixes for known issues.

If the problem persists, contacting Toradex technical support with detailed logs and schematics would be advisable for more in-depth assistance.

Please, also check if these links can help you solve your problem:

iMX6ULL intermittent Ethernet PHY issue.