Re: [RFC PATCH] USB:XHCI:Modify XHCI driver for USB2.0 controller

[Alan Stern]

On Fri, Feb 26, 2021 at 04:21:37PM +0800, Longfang Liu wrote:
> Our current XHCI hardware controller has been customized to only
> support USB 2.0 ports. When using the current xhci driver, an xhci
> controller device and an ehci controller device will be created
> automatically.

That sentence makes no sense at all.  An EHCI controller device is a 
piece of hardware.  How can an xHCI driver, which is a piece of 
software, create a piece of hardware?

Alan Stern