From 5ed132db5ad4f58156ae9d28219396b6f764a9cb Mon Sep 17 00:00:00 2001 From: Badhri Jagan Sridharan Date: Tue, 20 Oct 2020 02:36:18 -0700 Subject: dt-bindings: connector: Add property to set initial current cap for FRS This change adds frs-typec-current which allows setting the initial current capability of the new source when vSafe5V is applied during PD3.0 sink Fast Role Swap. Signed-off-by: Badhri Jagan Sridharan Reviewed-by: Rob Herring Link: https://lore.kernel.org/r/20201020093627.256885-2-badhri@google.com Signed-off-by: Greg Kroah-Hartman --- .../devicetree/bindings/connector/usb-connector.yaml | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'Documentation/devicetree/bindings/connector') diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml index 728f82db073d..62781518aefc 100644 --- a/Documentation/devicetree/bindings/connector/usb-connector.yaml +++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml @@ -147,6 +147,25 @@ properties: required: - port@0 + new-source-frs-typec-current: + description: Initial current capability of the new source when vSafe5V + is applied during PD3.0 Fast Role Swap. "Table 6-14 Fixed Supply PDO - Sink" + of "USB Power Delivery Specification Revision 3.0, Version 1.2" provides the + different power levels and "6.4.1.3.1.6 Fast Role Swap USB Type-C Current" + provides a detailed description of the field. The sink PDO from current source + reflects the current source's(i.e. transmitter of the FRS signal) power + requirement during fr swap. The current sink (i.e. receiver of the FRS signal), + a.k.a new source, should check if it will be able to satisfy the current source's, + new sink's, requirement during frswap before enabling the frs signal reception. + This property refers to maximum current capability that the current sink can + satisfy. During FRS, VBUS voltage is at 5V, as the partners are in implicit + contract, hence, the power level is only a function of the current capability. + "1" refers to default USB power level as described by "Table 6-14 Fixed Supply PDO - Sink". + "2" refers to 1.5A@5V. + "3" refers to 3.0A@5V. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [1, 2, 3] + required: - compatible -- cgit v1.2.3