[PATCH v7 01/10] dt-binding: usb: add usb-role-switch property

Chunfeng Yun chunfeng.yun at mediatek.com
Tue Jun 11 01:44:31 PDT 2019

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 at bp.renesas.com>
Cc: Yu Chen <chenyu56 at huawei.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun at mediatek.com>
Reviewed-by: Rob Herring <robh at kernel.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus at linux.intel.com>
v7: no changes

    1. merge into this series patch
    2. add Reviewed-by

(no v4, v5)

    add property type, modify description suggested by Heikki

    describe it in terms of h/w functionality suggested by Rob

    the property is discussed in:
    [v2,2/7] dt-bindings: usb: renesas_usb3: add usb-role-switch property

    Mediatek and Hisilicon also try to use it:
    [v4,3/6] dt-bindings: usb: mtu3: add properties about USB Role Switch
    [v4,6/6] usb: mtu3: register a USB Role Switch for dual role mode

    [v6,10/13] usb: dwc3: Registering a role switch in the DRD code
 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:

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