Interfacing Imx6 with emmc

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To interface an external eMMC with the iMX6 on a Toradex Colibri evaluation board, you need to ensure a few things:

  1. Hardware Connections: Make sure that the eMMC is properly connected to the evaluation board. Since eMMC does not have a card detect pin like SD cards, you need to ensure that the connections for power, ground, and data lines are correctly made.

  2. Power Supply: Ensure that the eMMC is receiving the correct power supply. Check the datasheet of the eMMC (MTFC8GAMALNA-AAT) for the required voltage levels and ensure that these are provided by the evaluation board.

  3. Device Tree Configuration: You may need to modify the device tree to properly configure the eMMC interface. This involves setting up the correct pins and enabling the eMMC interface in the device tree source (DTS) file. You might need to add or modify entries related to the eMMC in the DTS file used for your board.

  4. Kernel Configuration: Ensure that the kernel is configured to support eMMC. This includes enabling the MMC/SD/SDIO support in the kernel configuration.

  5. Driver Support: Verify that the appropriate drivers for eMMC are included in your Linux build. The MMC subsystem should be enabled, and any specific drivers for the iMX6’s MMC interface should be included.

  6. Debugging: Use kernel logs (dmesg) to check for any messages related to the MMC subsystem when the board boots. This can provide clues if the eMMC is being detected at the hardware level but not properly initialized.

  7. External Initialization: If the eMMC requires any specific initialization sequence, ensure that this is handled either in the bootloader (U-Boot) or early in the kernel boot process.

If after checking these aspects the eMMC is still not detected, you may need to consult the technical support or community forums for more specific guidance related to your hardware setup and software configuration.

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

Flash Apalis iMX6 through internal eMMC.