how to power off an usb device

Hi All,

we have an embedded arm9 linux-2.6.20 system with usb devices conncted
via hubs. The hubs are able to power on/off each device. Is it
possible to power off single devices per software?
(This would be needed if a single device does'nt respond any more)

I searched the kernel sources , but found only functions for suspend
via power management.

Or is this function doable with an usb reset? and how do I do this?

Thanks for any information.

Leopold Faschalek

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