Commit ca0584c4 authored by Badhri Jagan Sridharan's avatar Badhri Jagan Sridharan Committed by Greg Kroah-Hartman
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dt-bindings: connector: Add slow-charger-loop definition 



Allows PMIC charger loops which are slow(i.e. cannot meet the
15ms deadline) to still comply to pSnkStby i.e Maximum power
that can be consumed by sink while in Sink Standby state as defined
in 7.4.2 Sink Electrical Parameters of USB Power Delivery Specification
Revision 3.0, Version 1.2.

This patch introduces slow-charger-loop which when set makes
the port request PD_P_SNK_STDBY_MW(2.5W i.e 500mA@5V) upon entering
SNK_DISCOVERY (instead of 3A or the 1.5A during SNK_DISCOVERY) and the
actual currrent limit after RX of PD_CTRL_PSRDY for PD link or during
SNK_READY for non-pd link.

Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarBadhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210414142656.63749-3-badhri@google.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2e5db2c0

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

+10 −0
Original line number Diff line number Diff line
@@ -197,6 +197,16 @@ properties: 
    $ref: /schemas/types.yaml#/definitions/uint32

    enum: [1, 2, 3]



  slow-charger-loop:

    description: Allows PMIC charger loops which are slow(i.e. cannot meet the 15ms deadline) to

      still comply to pSnkStby i.e Maximum power that can be consumed by sink while in Sink Standby

      state as defined in 7.4.2 Sink Electrical Parameters of USB Power Delivery Specification

      Revision 3.0, Version 1.2. When the property is set, the port requests pSnkStby(2.5W -

      5V@500mA) upon entering SNK_DISCOVERY(instead of 3A or the 1.5A, Rp current advertised, during

      SNK_DISCOVERY) and the actual currrent limit after reception of PS_Ready for PD link or during

      SNK_READY for non-pd link.

    type: boolean



required:

  - compatible