dt-bindings: usb: fsa4480: Add data-lanes property to endpoint

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Allow specifying data-lanes to reverse the muxing orientation between
AUX+/- and SBU1/2 where necessary by the hardware design.

In the mux there's a switch that needs to be controlled from the OS, and
it either connects AUX+ -> SBU1 and AUX- -> SBU2, or the reverse: AUX+
-> SBU2 and AUX- -> SBU1, depending on the orientation of how the USB-C
connector is plugged in.

With this data-lanes property we can now specify that AUX+ and AUX-
connections are swapped between the SoC and the mux, therefore the OS
needs to consider this and reverse the direction of this switch in the
mux.

_______          _______
      |          |     |
      |-- HP   --|     |
      |-- MIC  --|     |or
SoC   |          | MUX |-- SBU1 --->  To the USB-C
Codec |-- AUX+ --|     |-- SBU2 --->  connected
      |-- AUX- --|     |
______|          |_____|

(thanks to Neil Armstrong for this ASCII art)

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231020-fsa4480-swap-v2-1-9a7f9bb59873@fairphone.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Luca Weiss 2023-10-20 11:33:18 +02:00 • committed by Greg Kroah-Hartman

parent 4987daf86c

commit fad89aa14c

1 changed files with 28 additions and 1 deletions

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Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml

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