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

Dear Jim Lin,

In message 4B9C9637D5087840A465BDCB251780E9E2D6EDA3EB@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