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| author | Badhri Jagan Sridharan <badhri@google.com> | 2020-10-20 02:36:18 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-28 13:06:58 +0100 |
| commit | 5ed132db5ad4f58156ae9d28219396b6f764a9cb (patch) | |
| tree | 77273efa07b1ba6144c6557a26ffd3b8954a35d0 /Documentation/devicetree/bindings/connector | |
| parent | 96eea5876eb01c35f6eda225f0cdc752a59b6615 (diff) | |
| download | lwn-5ed132db5ad4f58156ae9d28219396b6f764a9cb.tar.gz lwn-5ed132db5ad4f58156ae9d28219396b6f764a9cb.zip | |
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 <badhri@google.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201020093627.256885-2-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/connector')
| -rw-r--r-- | Documentation/devicetree/bindings/connector/usb-connector.yaml | 19 |
1 files changed, 19 insertions, 0 deletions
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 |