[meta-freescale] SabreLite can not boot from SD card

[Baodong Chen]

Hi Eric:
Thanks for your reply.
All i want is to have a sdcard image which contains u-boot, kernel and
rootfs all in it.
I have written SD loader to NOR flash already.
So after bitbake, using the following two commands seems work for me, the
u-boot is loaded by SD loader from NOR flash and kernel is loaded by u-boot.

dd if=fsl-image-gui-nitrogen6x.sdcard of=/dev/sdb
dd if=u-boot.imx of=/dev/sdb bs=512 seek=2

Am i right? or am i misunderstaning something?


On Thu, Feb 20, 2014 at 8:58 AM, Eric Nelson <
eric.nelson at boundarydevices.com> wrote:

> Hi Baodong,
>
>
> On 02/19/2014 05:36 PM, Baodong Chen wrote:
>
>> Hi guys:
>> I am using dora branch and MACHINE = "nitrogen6x" for my my SabreLite
>> board, the build is ok. after that, i follow this link:
>> https://wiki.linaro.org/Boards/MX6QSabreLite
>> to write the SD loader to NOR flash.
>>
>> and i "dd if=fsl-image-gui-nitrogen6x.sdcard of=/dev/sdb" to write the
>> image to sdcard and insert the sdcard to SD Slot(not micro SD slot), but
>> can not boot.
>> nothing output from debug serial.
>>
>> if i "dd if=u-boot.imx of=/dev/sdb bs=512 seek=2" and i can see the
>> u-boot message from debug serial, but the kernel can not loaded.
>>
>> does fsl-image-gui-nitrogen6x.sdcard contains u-boot.imx in it?
>>
>>
> Since SABRE Lite and Nitrogen6x boot to SPI-NOR, you don't need
> to do anything weird here.
>
> You can just dd the fsl-image-gui-nitrogen6x.sdcard image to
> the entire SD card.
>
> It should absolutely come up with a partition table, although
> the size of partition 2 may be a bit small (it's very conservative).
>
> You can double-check using fdisk immediately after running the dd
> command if you use "partprobe" to force a re-read of the
> partition table:
>
>         ~/$ sudo dd if=fsl-image-gui-nitrogen6x.sdcard ...
>         ~/$ sync && sudo partprobe
>         ~/$ sudo fdisk /dev/sdx
>
> The u-boot.imx file is installed as a part of the build
> process, but it's placed into a FAT filesystem in partition 1,
> along with an upgrade script named 6x_upgrade that you can
> use to copy it to SPI-NOR if you feel the need.
>
> In general, we suggest that customers only upgrade U-Boot
> when there's some new feature (like upcoming USB OTG support).
>
> Regards,
>
>
> Eric
>
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