[U-Boot] [PATCH 1/1] USB: EHCI: Initialize multiple USB controllers at once

[Wolfgang Denk]

Dear Jim Lin,

In message <4B9C9637D5087840A465BDCB251780E9E2D6EDA3EB at HKMAIL02.nvidia.com> you wrote:
> Add support for command line "usb reset" or "usb start" to initialize
> , "usb stop" to stop multiple USB controllers at once.
> Other commands like "usb tree" also support multiple controllers.

Why would this be needed?

U-Boot is not multi-tasking, so you can always access only a single
USB device at a time ayway.  And it is a decoumented design principle
that U-Boot must not initialize any devices it does not use itself.

So why?

Best regards,

Wolfgang Denk

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