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dt-bindings: connector: usb: add altmodes description

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Add description of the USB-C AltModes supported on the particular USB-C
connector. This is required for devices like Qualcomm Robotics RB5,
which have no other way to express alternative modes supported by the
hardware platform.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20231204020303.2287338-2-dmitry.baryshkov@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Baryshkov 2023-12-04 04:03:00 +02:00 committed by Greg Kroah-Hartman
parent 7516f86aa5
commit d1756ac67e
1 changed files with 33 additions and 0 deletions
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33
Documentation/devicetree/bindings/connector/usb-connector.yaml
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@ -171,6 +171,32 @@ properties:
offer the power, Capability Mismatch is set. Required for power sink and
power dual role.
altmodes:
type: object
description: List of Alternative Modes supported by the schematics on the
particular device. This is only necessary if there are no other means to
discover supported alternative modes (e.g. through the UCSI firmware
interface).
additionalProperties: false
patternProperties:
"^(displayport)$":
type: object
description:
A single USB-C Alternative Mode as supported by the USB-C connector logic.
additionalProperties: false
properties:
svid:
$ref: /schemas/types.yaml#/definitions/uint16
description: Unique value assigned by USB-IF to the Vendor / AltMode.
enum: [ 0xff01 ]
vdo:
$ref: /schemas/types.yaml#/definitions/uint32
description: VDO returned by Discover Modes USB PD command.
port:
$ref: /schemas/graph.yaml#/properties/port
description: OF graph bindings modeling a data bus to the connector, e.g.
@ -289,6 +315,13 @@ examples:
compatible = "usb-c-connector";
label = "USB-C";
altmodes {
displayport {
svid = /bits/ 16 <0xff01>;
vdo = <0x00001c46>;
};
};
ports {
#address-cells = <1>;
#size-cells = <0>;