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Date: Wed, 29 May 2019 15:43:39 +0800 From: Chunfeng Yun <chunfeng.yun@...iatek.com> To: Rob Herring <robh+dt@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Heikki Krogerus <heikki.krogerus@...ux.intel.com> CC: Mark Rutland <mark.rutland@....com>, Chunfeng Yun <chunfeng.yun@...iatek.com>, Matthias Brugger <matthias.bgg@...il.com>, Adam Thomson <Adam.Thomson.Opensource@...semi.com>, Li Jun <jun.li@....com>, Badhri Jagan Sridharan <badhri@...gle.com>, Hans de Goede <hdegoede@...hat.com>, Andy Shevchenko <andy.shevchenko@...il.com>, Min Guo <min.guo@...iatek.com>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>, Biju Das <biju.das@...renesas.com>, Linus Walleij <linus.walleij@...aro.org>, Yu Chen <chenyu56@...wei.com> Subject: [PATCH v6 01/10] dt-binding: usb: add usb-role-switch property Add a property usb-role-switch to tell the driver that use USB Role Switch framework to handle the role switch, it's useful when the driver has already supported other ways, such as extcon framework etc. Cc: Biju Das <biju.das@...renesas.com> Cc: Yu Chen <chenyu56@...wei.com> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com> Reviewed-by: Rob Herring <robh@...nel.org> Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com> --- v6: 1. merge into this series patch 2. add Reviewed-by (no v4, v5) v3: add property type, modify description suggested by Heikki v2: describe it in terms of h/w functionality suggested by Rob 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 | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt index 0a74ab8dfdc2..cf5a1ad456e6 100644 --- a/Documentation/devicetree/bindings/usb/generic.txt +++ b/Documentation/devicetree/bindings/usb/generic.txt @@ -30,6 +30,10 @@ 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: boolean, indicates that the device is capable of assigning + the USB data role (USB host or USB device) for a given + USB connector, such as Type-C, Type-B(micro). + see connector/usb-connector.txt. This is an attribute to a USB controller such as: -- 2.21.0
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