| Message ID | 20231020-fsa4480-swap-v2-1-9a7f9bb59873@fairphone.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Handle reversed SBU orientation for FSA4480 | expand |
On Fri, 20 Oct 2023 11:33:18 +0200, Luca Weiss wrote: > 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> > --- > .../devicetree/bindings/usb/fcs,fsa4480.yaml | 29 +++++++++++++++++++++- > 1 file changed, 28 insertions(+), 1 deletion(-) > Reviewed-by: Rob Herring <robh@kernel.org>
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
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> --- .../devicetree/bindings/usb/fcs,fsa4480.yaml | 29 +++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-)