Re: [PATCH 08/12] xhci: Add Intel extended cap / otg phy mux handling

Heikki Krogerus
2018-02-16T13:32:28Z

On Fri, Feb 16, 2018 at 11:47:47AM +0100, Hans de Goede wrote:
> The xHCI controller on various Intel SoCs has an extended cap mmio-range
> which contains registers to control the muxing to the xHCI (host mode)
> or the dwc3 (device mode) and vbus-detection for the otg usb-phy.
>
> Having a role-sw driver included in the xhci code (under drivers/usb/host)
> is not desirable. So this commit adds a simple handler for this extended
> capability, which creates a platform device with the caps mmio region as
> resource, this allows us to write a separate platform role-sw driver for
> the role-switch.
>
> Note this commit adds a call to the new xhci_ext_cap_init() function
> to xhci_pci_probe(), it is added here because xhci_ext_cap_init() must
> be called only once. If in the future we also want to handle ext-caps
> on non pci xHCI HCDs from xhci_ext_cap_init() a call to it should also
> be added to other bus probe paths.
>
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

Thanks,

--
heikki