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    Subject[PATCH v10 05/15] dt-bindings: connector: Add property to set initial current cap for FRS
    From
    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 <badhri@google.com>
    ---
    Changes since v1:
    - Changing patch version to v6 to fix version number confusion.

    Changes since v6:
    - Removed the redundant usb-connector.txt that I created by mistake.
    - Moved to yaml.

    Changes since v7:
    - Rebase

    Changes since v8:
    - Redefine new-source-frs-typec-current as string enums to address
    Rob Herring's comment.

    Changes since v9:
    - Removed FRS constants from usb bindings.
    ---
    .../bindings/connector/usb-connector.yaml | 26 +++++++++++++++++++
    1 file changed, 26 insertions(+)

    diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml
    index 9bd52e63c935..d9f65e81065e 100644
    --- a/Documentation/devicetree/bindings/connector/usb-connector.yaml
    +++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml
    @@ -142,6 +142,32 @@ 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.
    + "not-supported" implies sink to source fast role swap not supported.
    + "default" refers to default USB power level as described by
    + "Table 6-14 Fixed Supply PDO - Sink".
    + "1.5A" refers to 1.5A@5V.
    + "3.0A" refers to 3.0A@5V.
    +
    + $ref: /schemas/types.yaml#/definitions/string
    + enum:
    + - not-supported
    + - default
    + - 1.5A
    + - 3.0A
    +
    required:
    - compatible

    --
    2.28.0.806.g8561365e88-goog
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