[U-Boot] Mainlining android fastboot support to upstream u-boot

[Zach Pfeffer]

>> So, "Google uses it aside", it seems that being able to boot via USB
>> is a useful thing and fastboot is a particular solution; I'm not
>> entirely sure what other USB u-boot extensions exist apart from those
>
> Well, DFU support is a standard solution, and the LF / CELF has just
> recently assigned resources to adapt the existingout-of-tree port for
> mainline U-boot.

Perhaps John and the LF /CELF resource could work together so both DFU
and fastboot would work?

>> already mentioned. I find u-boot great and think being able to use USB
>> instead of a serial port would help adoption. Perhaps we can do away
>> with fastboot if u-boot had USB support?
>
> U-Boot has this.  We have serial console over USB. We even have
> netconsole over Ethernet over USB.
>
> OK, not on all boards and architectures, butthe gound has been laid
> and there is something to build on.
>
>> Of course part of RERO is "listen to your customers." With the end of
>> native serial port inclusion on most systems and the proliferation of
>> USB, it seems that something could be done to the benefit of all.
>> Actually, it would be kind of cool to have some low level USB config
>> in u-boot.
>
> I cannot really follow this argument.  A plain simple USB serial
> adapter will do the job as well.

I just meant to say that many customers have fastbootable devices and
development stations without native serial. It is easy to get a
converter, but its even easier to just use a USB cable.