[U-Boot] [PATCH] i.mx: i.mx6q: add the initial support for i.mx6q Sabre Lite board

[Dirk Behme <dirk.behme@de.bosch.com>]

On 06.12.2011 09:46, Stefano Babic wrote:
> On 05/12/2011 14:26, Dirk Behme wrote:
>> On 05.12.2011 14:23, Fabio Estevam wrote:
>>> On Mon, Dec 5, 2011 at 10:57 AM, Jason Liu <jason.hui@linaro.org> wrote:
>>>
>>>> +IMAGE_VERSION 2
>>>> +
>>>> +# Boot Device : one of
>>>> +# spi, sd (the board has no nand neither onenand)
>>>> +
>>>> +BOOT_FROM      sd
>>> This board does not boot from sd, only from SPI NOR.
>>>
>>> Could you please let me know how it was tested?
> 
> Hi Dirk,
> 
>> There is a 'workaround/patch' available from Freescale which switches
>> the board to SD boot. It's a small program written to the SPI NOR
>> replacing the U-Boot in SPI NOR, which then itself jumps back to the SD
>> boot routines. From user point of view the boards boots from SD then.
> 
> But if I really understand, the board boots always from SPI NOR, in
> other words the SPI NOR cannot be empty, as it can be if the board boots
> drirectly from SD.

Yes, this is correct. The ~20 line workaround is executed first in the 
SPI NOR and then jumps back to the SD boot routines. Hopefully there 
will be updated/modified boards in the future were the boot mode is 
configurable, again.

>> With a small, invisible indirection via the SPI NOR.
> 
> Then we need a document / README, as remarked by Fabio, to describe this
> process.

Fabio: Do you think you could provide such a readme after your tests?

Many thanks

Dirk