Dear David,
In message AC5E1C3367E37D44970B81A6ADD1DA2C087E7893@SDCEXCHANGE01.ad.amcc.com you wrote:
I generated several versions for a remote team to test (I don't have the failing hardware). Only the 100ms version worked every time.
I see :-(
Actually we need the reset prior to Linux boot as well. Otherwise Linux will not discover attached devices. Which is the whole reason for the patch...
No, we don't. Why should we add a delay for all systems, even when neither U-Boot not Linux will ever use any USB? For example ion boards where not even a USB connector is physically present on the hardware?
Please (re-) read the U-Boot Design Principles, item 2 "Keep it fast": http://www.denx.de/wiki/view/U-Boot/DesignPrinciples#2_Keep_it_Fast
If USB is not used in U-Boot itself, U-Boot shall not initialize it at all. And we should never impose restrictions or penalties (delays) on everybody for features that are used only by some.
Best regards,
Wolfgang Denk