On Sun, Apr 28, 2019 at 08:27:46PM +0800, Chunfeng Yun wrote: > Add a property usb-role-switch to tell Dual-Role controller driver > that use USB Role Switch framework to handle the role switch between > host mode and device mode, it's useful when the driver has already > supported other ways, such as extcon framework etc. > > Cc: Biju Das <biju.das@xxxxxxxxxxxxxx> > Cc: Yu Chen <chenyu56@xxxxxxxxxx> > Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx> > --- > v1: > the property is discussed in: > [v2,2/7] dt-bindings: usb: renesas_usb3: add usb-role-switch property > https://patchwork.kernel.org/patch/10852497/ > > Mediatek and Hisilicon also try to use it: > [v4,3/6] dt-bindings: usb: mtu3: add properties about USB Role Switch > https://patchwork.kernel.org/patch/10918385/ > [v4,6/6] usb: mtu3: register a USB Role Switch for dual role mode > https://patchwork.kernel.org/patch/10918367/ > > [v6,10/13] usb: dwc3: Registering a role switch in the DRD code > https://patchwork.kernel.org/patch/10909981/ > --- > Documentation/devicetree/bindings/usb/generic.txt | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt > index 0a74ab8dfdc2..c73950b72513 100644 > --- a/Documentation/devicetree/bindings/usb/generic.txt > +++ b/Documentation/devicetree/bindings/usb/generic.txt > @@ -30,6 +30,9 @@ Optional properties: > optional for OTG device. > - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is > optional for OTG device. > + - usb-role-switch: tells Dual-Role USB controller driver that we want to use > + USB Role Switch framework to handle the role switch > + between host mode and device mode. Please describe this in terms of h/w functionality, not drivers and Linux things. Rob
