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Original question:

AM62L: Emmc Boot failure in some boards

AM62L: eMMC Boot failure

Ninad J S
Prodigy 170 points

Part Number: AM62L

Hello Team,

Alongside the issue with ERROR reset board , In some of the other boards we noticed 
below error when kept for continuous power on and off test---

mmc0(part 0) is current device
SD/MMC found on device 0
## Error: "loadbootscript" not defined
switch to partitions #0, OK
mmc0(part 0) is current device
6788 bytes read in 15 ms (441.4 KiB/s)
Loaded env from uEnv.txt
Importing environment from mmc0 ...
 ** fs_devread read error - block
Failed to load '/boot/Image'
** No partition table - mmc 0 **
Couldn't find partition mmc 0:2
Can't set block device
libfdt fdt_check_header(): FDT_ERR_BADMAGIC
No FDT memory address configured. Please configure
the FDT address via "fdt addr <address>" command.
Aborting!
ERROR: Did not find a cmdline Flattened Device Tree
Could not find a valid device tree
Scanning for bootflows in all bootdevs
Seq  Method       State   Uclass    Part  Name                      Filename
---  -----------  ------  --------  ----  ------------------------  ----------------
Unknown uclass 'ospi' in label
Scanning bootdev 'mmc@fa10000.bootdev':
Scanning bootdev 'mmc@fa00000.bootdev':
MMC: no card present
MMC: no card present
MMC: no card present
No more bootdevs
---  -----------  ------  --------  ----  ------------------------  ----------------
(0 bootflows, 0 valid)
iWave-G69M >


Booting stopped here in some cases .

Is it related to eMMC failure itself ?




  • 0
    TI__Genius 10050 points

    Hi Ninad,

    Thank you for creating this separate thread. I'll add link to the original thread this one stems from.

    Please allow me some time to internally check. I'll get back to you later today.

    Thanks

    Kind Regards

    Anastas Yordanov

  • 0 in reply to Anastas Yordanov
    TI__Genius 10050 points

    Hi Ninad,

    I would like to apologize for my delayed response here.

    I am adding the link to the related thread :

    AM62L: eMMC Boot Failure in some boards

    onto which, as you know, we are still working together with our U-Boot/ Linux eMMC driver expert - Prashant.

    Q1. Can you confirm that the above log (with errors highlighted in orange below) is observed when you tried booting Kernel in U-Boot set to operate at HS200 ?  To me it seems that some of the eMMC read access operations sporadically failed, which caused unsuccessful Linux boot.

    Q2: Is the same issue reproduced after constraining the  eMMC_CLK freq. = 52 MHz in U-Boot ?  

    Thanks

    Best Regards

    Anastas Yordanov