Re: EHCI Full speed

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On Mon, 25 Jul 2011, Felipe Balbi wrote:

> Hi,
> 
> On Mon, Jul 25, 2011 at 07:04:44PM +0200, Jose Alberto Reguero wrote:
> > Is there a way to limit ehci to Full speed(12 MB), or to disable the load of 
> > ehci when compiled in kernel?

Notice:       ^^^^^^^^^^^^^^^^^^

> 
> EHCI only handles High Speed, Full and low speeds are handled by OHCI.
> So if you remove ehci (modprobe -r ehci_hcd), it will always work on
> full/low speed :-)

If ehci-hcd is compiled into the kernel, you cannot remove it.

However, you can unbind ehci-hcd from the controllers.  Go into 
/sys/bus/pci/drivers/ehci_hcd, and for each of the symbolic device 
links there, write the name to the "unbind" file.  For example:

	echo 0000:00:1d.7 >unbind

Alan Stern

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