• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 97 subscribers
  • Views 959 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

Linux/TDA2P-ACD: NAND Flash Configiration in U-boot for TDA2p device

Linux/TDA2P-ACD: EMMC Flash Configiration in U-boot for TDA2p device

Swapnil Balpande
Prodigy 180 points
Part Number: TDA2P-ACD

Tool/software: Linux

Hi,

We are trying to enable the eMMC (8 GB) in U-boot for custom board with TDA2PX.

U-boot is unable to detect the eMMC.

Please suggest the changes for 3.3 volts

Note - eMMC  vcc and vio are connected to 3.3 volt  but on evm this is connected to 1.8 v .

Regards,

Swapnil

  • Former Member
    0 Former Member
    Hi,
    Can you tell us how did you write to the eMMC partition?
    Is there any other boot mode through which you verified the booting operation before doing this?

    Regards,
    Somnath
  • 0 in reply to Former Member
    Prodigy 180 points
    Hi Somnath,

    We have successfully boot the uboot from sd card connected to mmc1 . When we type command "mmc list" on uboot console it only shows sd card detected.

    e.g : mmc list
    OMAP SD/MMC: 0 (SD)
    OMAP SD/MMC: 1

    When I try to write on eMMC partitions given in wiki TI

    Command on uboot:
    U-Boot # gpt write mmc 1 ${partitions}
    U-Boot # mmc1 device not found


    In my previous mail I have mentioned that my eMMC connected to 3.3 volts (mmc2) and default configuration in dts file (dra76_evm.dts) is "vmmc-supply = <&vio_1v8>" for mmc2 node. When I try to change the supply to vio_3v3_sd 0r vio_3v3 it won't work.

    So, Please suggest the changes for 3.3 volts.

    Regards,
    Swapnil
  • Former Member
    0 Former Member in reply to Swapnil Balpande
    Hi,
    Can you issue the following set of commands and see what happens?

    U-Boot # mmc dev 1
    U-Boot # gpt write mmc 1 ${partitions}

    Also, please #define and MMC_TRACE in include/configs/dra7xx_evm.h. This will enable more debug information.

    Regards,
    Somnath