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dt-bindings: connector: Add slow-charger-loop definition

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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: Rob Herring <robh@kernel.org>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210414142656.63749-3-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Badhri Jagan Sridharan 2021-04-14 07:26:56 -07:00 committed by Greg Kroah-Hartman
parent 2e5db2c0e5
commit ca0584c40a
1 changed files with 10 additions and 0 deletions
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10
Documentation/devicetree/bindings/connector/usb-connector.yaml
View file

@ -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