Re: [PATCH v1 1/1] mux: mux-intel-usb: Add Intel USB Multiplexer driver

[sathyanarayanan kuppuswamy]

Hi Andy,


On 05/30/2017 09:20 AM, Andy Shevchenko wrote:
> On Tue, May 30, 2017 at 3:47 AM,
> <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> wrote:
> > From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
> >
> > In some Intel SOCs, a single USB port is shared between USB device and
> SoCs
>
> > host controller and an internal mux is used to control the selection of
> > port by host/device controllers. This driver adds support for the USB
> > internal mux, and all consumers of this mux can use interfaces provided
> > by mux subsytem to control the state of the internal mux.
> > +config MUX_INTEL_USB
> > +       tristate "Intel USB Mux"
> It's indeed Intel's IP?
Register map to control this MUX comes from Intel vendor defined XHCI 
extended cap region of SOC.
> I would rather believe that it is some 3rd
> party known IP block with platform specific soldering.
I don't think its platform specific support. I believe its a SOC 
specific thing( mainly for CHT and APL SoCs).
>

--
Sathyanarayanan Kuppuswamy
Linux kernel developer