fatload from eMMC general purpose partition

Hi,

using an eMMC I want to load uImage and dtb from a general purpose partition (since these can be configured as pSLC independent of the user data area).
From the kernel I can format and access the GP-partition, in my case
mkfs.vfat. However, U-Boots fatload/extload on the GP-partition do not work or maybe I just give the wrong parameters. Is this implemented at all, any hints?

Regards

Andreas

Hi Andreas,

As far as I remember the FAT related directories are working correctly with some our boards.

Could you share exact output from your console?

Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group

Hi,

below follows some linux console output from writing some file to a gp- and a user data partion (foo/bar). After that trying to see that file from U-Boot...:

[root]# ls /dev/mmcblk3*
/dev/mmcblk3
/dev/mmcblk3boot1
/dev/mmcblk3gp0p1
/dev/mmcblk3p1
/dev/mmcblk3rpmb
/dev/mmcblk3boot0
/dev/mmcblk3gp0
/dev/mmcblk3gp1

Rest of User Data Area
mount /dev/mmcblk3p1 /media/usb0/
touch /media/usb0/foo
umount /media/usb0/

General purpose patition
[root]# mount /dev/mmcblk3gp0p1 /media/usb0/
[root]# touch /media/usb0/bar
[root]# umount /media/usb0/

Start u-boot

Rest of User Data Area
U-Boot =>fatls mmc 2:1 /
0 foo

1 file(s), 0 dir(s)

U-Boot =>fatls mmc 2:2 /
** Invalid partition 2 **
U-Boot =>fatls mmc 2:3 /
** Invalid partition 3 **
U-Boot =>fatls mmc 2:4 /
** Invalid partition 4 **
U-Boot =>fatls mmc 2:5 /
** Invalid partition 5 **
U-Boot =>fatls mmc 2:6 /
** Invalid partition 6 **
U-Boot =>fatls mmc 2:7 /
** Invalid partition 7 **
U-Boot =>fatls mmc 2:8 /
** Invalid partition 8 **
U-Boot =>fatls mmc 2:9 /
** Invalid partition 9 **
U-Boot =>fatls mmc 2:a /
** Invalid partition 10 **
U-Boot =>fatls mmc 2:b /
** Invalid partition 11 **
U-Boot =>fatls mmc 2:c /
** Invalid partition 12 **
U-Boot =>fatls mmc 2:d /
** Invalid partition 13 **
U-Boot =>fatls mmc 2:e /
** Invalid partition 14 **
U-Boot =>fatls mmc 2:f /
** Invalid partition 15 **

Where to find bar ?

regards,
Andreas

Hi Andreas,

I am facing a similar problem not able to access the GP partitions from uboot. Did you have any luck accessing these partitions??

Thanks,
Harsha

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