[4/8] usb: xhci: pci: Only create Intel mux device when it's needed

[Heikki Krogerus <heikki.krogerus@linux.intel.com>]

On Mon, Sep 03, 2018 at 10:01:01AM +0200, Hans de Goede wrote:
> This patch and "[PATCH 3/8] plarform: x86: intel_cht_int33fe: Use the USB role switch conditionally"
> both assume that the mux will be in host mode when Linux boots, so we do not need to
> touch it. I'm not sure that is a valid assumption.
> 
> More over the USB DP- / DP+ lines should be floated when in device
> mode, otherwise USB BC1.2 charger detection will not work, some
> PMIC-s have their mux for the data lines and will decouple them
> from the SoCs usb data lines when doing charger detection, but
> others simply piggy-back on the datalines and are hardwired to
> the DP- / DP+ lines of the SoC, if we then do not float the datalines
> the PMICs BC detection logic sees a USB host and assumes its a SDP
> (standard downstream port) and will limit the charging to 500mA.
> 
> This is at least true for all devices with an AXP288 PMIC, of which
> there are a lot (all recent cheap CHT designs use this PMIC).
> 
> So I believe it is best to drop patches 3 and 4 from this patch-set.

OK, fair enough. I'll drop those.

Thanks,