[PATCH 10/12] dt-bindings: usb: mtu3: add a optional property to disable u3ports

Chunfeng Yun
2017-10-09T02:43:47Z

On Thu, 2017-10-05 at 17:31 -0500, Rob Herring wrote:
> On Thu, Sep 28, 2017 at 08:17:18AM +0800, Chunfeng Yun wrote:
> > Add a new optional property to disable u3ports
> >
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> > ---
> > .../devicetree/bindings/usb/mediatek,mtu3.txt | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt b/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
> > index 49f5476..7c611d1 100644
> > --- a/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
> > +++ b/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
> > @@ -44,6 +44,8 @@ Optional properties:
> > - mediatek,enable-wakeup : supports ip sleep wakeup used by host mode
> > - mediatek,syscon-wakeup : phandle to syscon used to access USB wakeup
> > control register, it depends on "mediatek,enable-wakeup".
> > + - mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
> > + bit1 for u3port1, ... etc;
>
> How does this relate to the XHCI change? Same comment applies.

There is a upper layer called IPPC (IP Power and Clock interface) shared
by device IP and host IP (xHCI) to control power and clock of each port.
So I can disable or enable xCHI's ports by IPPC indirectly.