Re: how to power off an usb device

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Tue, 9 Oct 2007, Leopold Faschalek wrote:

> 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.

Check out this web page:

	http://www.gniibe.org/ac-power-by-usb/ac-power-control.html

Alan Stern


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