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| author | Luca Weiss <luca.weiss@fairphone.com> | 2023-10-20 12:33:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-27 13:54:29 +0300 |
| commit | fad89aa14c35f469ea7d3bf49ee1d5840eea0375 (patch) | |
| tree | 883a3085c28d35b64956b393f680620a552753ce /Documentation/devicetree/bindings/usb | |
| parent | 4987daf86c152ff882d51572d154ad12e4ff3a4b (diff) | |
| download | linux-fad89aa14c35f469ea7d3bf49ee1d5840eea0375.tar.xz | |
dt-bindings: usb: fsa4480: Add data-lanes property to endpoint
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>
Diffstat (limited to 'Documentation/devicetree/bindings/usb')
| -rw-r--r-- | Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml b/Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml index f6e7a5c1ff0b..86f6d633c2fb 100644 --- a/Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml +++ b/Documentation/devicetree/bindings/usb/fcs,fsa4480.yaml @@ -32,10 +32,37 @@ properties: type: boolean port: - $ref: /schemas/graph.yaml#/properties/port + $ref: /schemas/graph.yaml#/$defs/port-base description: A port node to link the FSA4480 to a TypeC controller for the purpose of handling altmode muxing and orientation switching. + unevaluatedProperties: false + + properties: + endpoint: + $ref: /schemas/graph.yaml#/$defs/endpoint-base + unevaluatedProperties: false + + properties: + data-lanes: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + Specifies how the AUX+/- lines are connected to SBU1/2. + oneOf: + - items: + - const: 0 + - const: 1 + description: | + Default AUX/SBU layout + - AUX+ connected to SBU2 + - AUX- connected to SBU1 + - items: + - const: 1 + - const: 0 + description: | + Swapped AUX/SBU layout + - AUX+ connected to SBU1 + - AUX- connected to SBU2 required: - compatible |