Commit 5ed132db authored by Badhri Jagan Sridharan's avatar Badhri Jagan Sridharan Committed by Greg Kroah-Hartman
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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: default avatarBadhri Jagan Sridharan <badhri@google.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201020093627.256885-2-badhri@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 96eea587

Documentation/devicetree/bindings/connector/usb-connector.yaml

+19 −0
Original line number Diff line number Diff line
@@ -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

include/dt-bindings/usb/pd.h

+8 −0
Original line number Diff line number Diff line
@@ -85,4 +85,12 @@ 
	 PDO_PPS_APDO_MIN_VOLT(min_mv) | PDO_PPS_APDO_MAX_VOLT(max_mv) |	\

	 PDO_PPS_APDO_MAX_CURR(max_ma))



 /*

  * Based on "Table 6-14 Fixed Supply PDO - Sink" of "USB Power Delivery Specification Revision 3.0,

  * Version 1.2"

  * Initial current capability of the new source when vSafe5V is applied.

  */

#define FRS_DEFAULT_POWER      1

#define FRS_5V_1P5A            2

#define FRS_5V_3A              3

 #endif /* __DT_POWER_DELIVERY_H */