[U-Boot] How to program u-boot in eMMC/MMC on iMX

[Otavio Salvador]

On Mon, Feb 23, 2015 at 11:57 AM, Marco Cavallini
<cavallini.koan at gmail.com> wrote:
> 2015-02-23 15:20 GMT+01:00 Fabio Estevam <festevam at gmail.com>:
>> Hi Marco,
>>
>> On Mon, Feb 23, 2015 at 11:11 AM, Marco Cavallini
>> <cavallini.koan at gmail.com> wrote:
>>> Hello,
>>>
>>> I'd like to know if exists a method to store in eMMC a bootolader
>>> without kobs-ng, so without using linux, but simply running a command
>>> from u-boot.
>>> I booted my i.MX28 system (I have the same question for i.MX6 as well)
>>> using the u-boot.sb (u-boot-2015.01 with SPL) file loaded with mxsldr
>>> (or imx-bootlets).
>>> Now I am trying to save it in eMMC with the following command
>>>  loady    (load u-boot.sb with ymodem)
>>>  mmc write ${loadaddr} 0 ${filesize}
>>> but at reboot nothing happens.
>>> Is it possible?
>>
>> You should flash u-boot.sd, not u-boot.sb.
>>
>> Please check doc/README.mxs on how to generate u-boot.sd.
>
>
> Hi Fabio,
> I did the following steps on the host
> $ make u-boot.sb
> $ ./tools/mxsboot sd u-boot.sb u-boot.sd
>
> then in u-boot
>> loady    (load u-boot.sd with ymodem)
>> mmc write ${loadaddr} 0 ${filesize}
>
> but at reboot no output on serial port.
> Maybe do I need to format the eMMC before?

The eMMC is handled as a SD Card so yes you need the partitioning, the
label and all same things you need in the SD. Check the README about
the partitioning details.

-- 
Otavio Salvador                             O.S. Systems
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