lkml.org 
[lkml]   [2023]   [Oct]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
Subject[PATCH v2 1/3] 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>
---
.../devicetree/bindings/usb/fcs,fsa4480.yaml | 29 +++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)

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
--
2.42.0

\
 
 \ /
  Last update: 2023-10-20 12:11    [W:2.909 / U:1.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site