linux-kernel - [PATCH v5 3/6] dt-bindings: usb: mtu3: add properties about USB Role Switch

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Message-ID: <1557823643-8616-4-git-send-email-chunfeng.yun@mediatek.com>
Date:   Tue, 14 May 2019 16:47:20 +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>
Subject: [PATCH v5 3/6] dt-bindings: usb: mtu3: add properties about USB Role Switch

Now the USB Role Switch is supported, so add properties about it,
and modify some description related.

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
v5 changes
 1. modify decription about extcon and vbus-supply properties
 2. make this patch depend on [1]

 [1]: [v3] dt-binding: usb: add usb-role-switch property
      https://patchwork.kernel.org/patch/10934835/

v4: no changes
v3: no changes

v2 changes:
  1. fix typo
  2. refer new binding about connector property
---
 .../devicetree/bindings/usb/mediatek,mtu3.txt          | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt b/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
index 3382b5cb471d..3a8300205cdb 100644
--- a/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
+++ b/Documentation/devicetree/bindings/usb/mediatek,mtu3.txt
@@ -28,8 +28,13 @@ Optional properties:
 	parent's address space
  - extcon : external connector for vbus and idpin changes detection, needed
 	when supports dual-role mode.
+	it's considered valid for compatibility reasons, not allowed for
+	new bindings, and use "usb-role-switch" property instead.
  - vbus-supply : reference to the VBUS regulator, needed when supports
 	dual-role mode.
+	it's considered valid for compatibility reasons, not allowed for
+	new bindings, and put into a usb-connector node.
+	see connector/usb-connector.txt.
  - pinctrl-names : a pinctrl state named "default" is optional, and need be
 	defined if auto drd switch is enabled, that means the property dr_mode
 	is set as "otg", and meanwhile the property "mediatek,enable-manual-drd"
@@ -39,6 +44,8 @@ Optional properties:
 
  - maximum-speed : valid arguments are "super-speed", "high-speed" and
 	"full-speed"; refer to usb/generic.txt
+ - usb-role-switch : use USB Role Switch to support dual-role switch, but
+	not extcon; see usb/generic.txt.
  - enable-manual-drd : supports manual dual-role switch via debugfs; usually
 	used when receptacle is TYPE-A and also wants to support dual-role
 	mode.
@@ -61,6 +68,9 @@ The xhci should be added as subnode to mtu3 as shown in the following example
 if host mode is enabled. The DT binding details of xhci can be found in:
 Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
 
+The port would be added as subnode if use "usb-role-switch" property.
+	see graph.txt
+
 Example:
 ssusb: usb@...71000 {
 	compatible = "mediatek,mt8173-mtu3";
-- 
2.21.0