[lkml]   [2019]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH next v11 03/11] dt-bindings: usb: add binding for USB GPIO based connection detection driver
It's used to support dual role switch via GPIO when use Type-B
receptacle, typically the USB ID pin is connected to an input
GPIO, and also used to enable/disable device when the USB Vbus
pin is connected to an input GPIO.

Signed-off-by: Chunfeng Yun <>
Reviewed-by: Linus Walleij <>
v11 changes:
1. add Reviewed-by Linus
2. change compatible as "gpio-usb-b-connector", and remove label
in example suggested by Rob

v9~v10 no changes

v8 changes:
1. rename the title
2. change the compatible as "linux,usb-conn-gpio" instead of

v7 changes:
1. add description for device only mode

v6 changes:
1. remove status and port nodes in example
2. make vbus-supply as optional property

v5 changes:
1. treat type-B connector as child device of USB controller's, but not
as a separate virtual device, suggested by Rob
2. put connector's port node under connector node, suggested by Rob

v4 no changes

v3 changes:
1. treat type-B connector as a virtual device, but not child device of
USB controller's

v2 changes:
1. new patch to make binding clear suggested by Hans
.../devicetree/bindings/usb/usb-conn-gpio.txt | 30 +++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/usb-conn-gpio.txt

diff --git a/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt b/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt
new file mode 100644
index 000000000000..3d05ae56cb0d
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt
@@ -0,0 +1,30 @@
+USB GPIO Based Connection Detection
+This is typically used to switch dual role mode from the USB ID pin connected
+to an input GPIO, and also used to enable/disable device mode from the USB
+Vbus pin connected to an input GPIO.
+Required properties:
+- compatible : should include "gpio-usb-b-connector" and "usb-b-connector".
+- id-gpios, vbus-gpios : input gpios, either one of them must be present,
+ and both can be present as well.
+ see connector/usb-connector.txt
+Optional properties:
+- vbus-supply : can be present if needed when supports dual role mode.
+ see connector/usb-connector.txt
+- Sub-nodes:
+ - port : can be present.
+ see graph.txt
+&mtu3 {
+ connector {
+ compatible = "gpio-usb-b-connector", "usb-b-connector";
+ type = "micro";
+ id-gpios = <&pio 12 GPIO_ACTIVE_HIGH>;
+ vbus-supply = <&usb_p0_vbus>;
+ };
 \ /
  Last update: 2019-08-29 11:23    [W:0.068 / U:1.988 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site