[U-Boot] uboot env in mmc partition

[Sachin Verma]

Hi Naitik,
On Wed, Sep 3, 2014 at 8:08 PM, Naitik Amin <Naitik.Amin at ametek.com> wrote:

> Below is the layout of my partitions.
>
> [root at IM /root]# cat /proc/partitions
> major minor  #blocks  name
>
>  179        0    3887104 mmcblk0
>  179        1      20480 mmcblk0p1
>  179        2     512000 mmcblk0p2
>  179        3       1024 mmcblk0p3
>  179        4         64 mmcblk0p4
>
> Further explanation
> Partition 1: Partition type: 0xB Fat32 (Holds zImage, dtb, rbf, uboot
> startup script)
> Partition 2: Partititon type: 0x83 ext3 (Holds rootfs)
> Partition 3: Partition type: A2 (raw) MBR looks for preloader at the
> beginning of the A2 partition. (Holds Preloader, followed by uboot)
> Partition 4: Partition type: A3 (raw) To hold the uboot-env (Newly
> created)
>
>
According to your partition layout, your environment offset must be :
(3887104 + 20480 + 512000 + 1024) = 4420608 blocks into the user partition
of eMMC.

So, the offset should be 4420608 * 512 = 2263351296 = 0x86E80000


The offset (0x21900000) you are using seems to be in your very first
partition i.e. mmcblk0 and hence it is corrupting your dtb and other files.

Best Regards,
Sachin Verma.