[PATCH] USB: Add support for Xilinx USB host controller

[Julie Zhu]

Thanks, Grant and Ben,

> > Add bus glue driver for Xilinx USB host controller. The controller can
> be
> > configured as HS only or HS/FS hybrid. The driver uses the device tree
> file
> > to configure the driver according to the setting in the hardware system.
> >
> > This driver has been tested with usbtest using the NET2280 PCI card.
> >
> > Signed-off-by: Julie Zhu <julie.zhu at xilinx.com>
> 
> As Ben said, this is nice tight code.  Two comments below.
> 
> > +/**
> > + * ehci_xilinx_port_handed_over - hand the port out if failed to enable
> it
> > + * @hcd:       Pointer to the usb_hcd device to which the host
> controller bound
> > + * @portnum:Port number to which the device is attached.
> > + *
> > + * This function is used as a place to tell the user that the Xilinx
> USB host
> > + * controller does support LS devices. And in an HS only configuration,
> it
> > + * does not support FS devices neither. It is hoped that this can help
> a
> 
> s/neither/either
> 
> [...]
> > +static struct of_device_id ehci_hcd_xilinx_of_match[] = {
> > +       {
> > +               .compatible = "usb-ehci",
> > +       },
> 
> This looks wrong.  Since this driver only works with Xilinx USB
> controllers,
> it should be binding against "xlnx,xps-usb-host-1.00.a", and the meaning
> of
> that binding needs to be documented in Documentation/powerpc/dts-bindings.
> 

I have changed the compatible to "xlnx,xps-usb-host-1.00.a", thanks for catching this.

Where should I put the binding for Xilinx USB host controller? usb-ehci.txt or xilinx.txt?

Thanks,
Julie.

> Having this driver bind against the generic "usb-ehci" will cause
> conflicts
> with the ehci-ppc-of driver.
> 



> Cheers,
> g.
> 
> --
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.


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