[U-Boot] SPL Dfu update

[Michael Trimarchi]

Hi

On Wed, Oct 30, 2013 at 9:11 PM, Wolfgang Denk <wd at denx.de> wrote:
> Dear Michael Trimarchi,
>
> In message <CAOf5uw=hCkwPaqogCO3KvM1erhS-dvC5BRT4USU3uqKETtTQ7A at mail.gmail.com> you wrote:
>>
>> > This does not answer Stefano's question: why do it in SPL, what's
>> > wrong with loading the real U-Boot for this purpose?
>>
>> Because it's not possible, internal memory size of some cpus. You need
>> to have a way to load the second stage and I'm discussing a general
>> way to do.
>
> I'm not sure that there are many use cases where you have sufficient
> room for all that is needed for DFU (including I/O buffers); and if
> you move to RAM early, you have other options as well.
>

No because you need anyway to have a way to load it and dfu is a way.

>> What is your alternative way?
>
> Depending on your hardware there is a zillion ways to do this.  For
> low to medium volumes good old JTAG is still a very powerful tool; for
> high volumes you will probably just fit pre-programmed NAND on your
> board.  And of course there is the growing number of systems that can
> just boot and install from a SDCard or USB MSD.
>

I accept the lesson even I don't thing that I need a lesson on it. We
are talking that we have only otg.
BTW Forget about it.

> Best regards,
>
> Wolfgang Denk

Michael

>
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