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dt-bindings: add bindings for USB physical connector

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These bindings allow to describe most known standard USB connectors
and it should be possible to extend it if necessary.
USB connectors, beside USB can be used to route other protocols,
for example UART, Audio, MHL. In such case every device passing data
through the connector should have appropriate graph bindings.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Andrzej Hajda 2018-02-27 08:11:29 +01:00 committed by Chanwoo Choi
parent 7928b2cbe5
commit 593aa2b405
1 changed files with 75 additions and 0 deletions
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75
Documentation/devicetree/bindings/connector/usb-connector.txt Normal file
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USB Connector
=============
USB connector node represents physical USB connector. It should be
a child of USB interface controller.
Required properties:
- compatible: describes type of the connector, must be one of:
"usb-a-connector",
"usb-b-connector",
"usb-c-connector".
Optional properties:
- label: symbolic name for the connector,
- type: size of the connector, should be specified in case of USB-A, USB-B
non-fullsize connectors: "mini", "micro".
Required nodes:
- any data bus to the connector should be modeled using the OF graph bindings
specified in bindings/graph.txt, unless the bus is between parent node and
the connector. Since single connector can have multpile data buses every bus
has assigned OF graph port number as follows:
0: High Speed (HS), present in all connectors,
1: Super Speed (SS), present in SS capable connectors,
2: Sideband use (SBU), present in USB-C.
Examples
--------
1. Micro-USB connector with HS lines routed via controller (MUIC):
muic-max77843@66 {
...
usb_con: connector {
compatible = "usb-b-connector";
label = "micro-USB";
type = "micro";
};
};
2. USB-C connector attached to CC controller (s2mm005), HS lines routed
to companion PMIC (max77865), SS lines to USB3 PHY and SBU to DisplayPort.
DisplayPort video lines are routed to the connector via SS mux in USB3 PHY.
ccic: s2mm005@33 {
...
usb_con: connector {
compatible = "usb-c-connector";
label = "USB-C";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
usb_con_hs: endpoint {
remote-endpoint = <&max77865_usbc_hs>;
};
};
port@1 {
reg = <1>;
usb_con_ss: endpoint {
remote-endpoint = <&usbdrd_phy_ss>;
};
};
port@2 {
reg = <2>;
usb_con_sbu: endpoint {
remote-endpoint = <&dp_aux>;
};
};
};
};
};