linux-kernel - [PATCH v4 3/7] dt-bindings: usb: Add Type-C switch binding

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Message-Id: <20220615172129.1314056-4-pmalani@chromium.org>
Date:   Wed, 15 Jun 2022 17:20:19 +0000
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Cc:     bleung@...omium.org, swboyd@...omium.org,
        heikki.krogerus@...ux.intel.com,
        Prashant Malani <pmalani@...omium.org>,
        Nícolas F . R . A . Prado 
        <nfraprado@...labora.com>, Andrzej Hajda <andrzej.hajda@...el.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS),
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS),
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Jonas Karlman <jonas@...boo.se>,
        José Expósito <jose.exposito89@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Maxime Ripard <maxime@...no.tech>,
        Neil Armstrong <narmstrong@...libre.com>,
        Pin-Yen Lin <treapking@...omium.org>,
        Robert Foss <robert.foss@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Xin Ji <xji@...logixsemi.com>
Subject: [PATCH v4 3/7] dt-bindings: usb: Add Type-C switch binding

Introduce a binding which represents a component that can control the
routing of USB Type-C data lines as well as address data line
orientation (based on CC lines' orientation).

Reviewed-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Signed-off-by: Prashant Malani <pmalani@...omium.org>
---

Changes since v3:
- No changes.

Changes since v2:
- Added Reviewed-by and Tested-by tags.

Changes since v1:
- Removed "items" from compatible.
- Fixed indentation in example.

 .../devicetree/bindings/usb/typec-switch.yaml | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/typec-switch.yaml

diff --git a/Documentation/devicetree/bindings/usb/typec-switch.yaml b/Documentation/devicetree/bindings/usb/typec-switch.yaml
new file mode 100644
index 000000000000..78b0190c8543
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/typec-switch.yaml
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/typec-switch.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: USB Type-C Switch
+
+maintainers:
+  - Prashant Malani <pmalani@...omium.org>
+
+description:
+  A USB Type-C switch represents a component which routes USB Type-C data
+  lines to various protocol host controllers (e.g USB, VESA DisplayPort,
+  Thunderbolt etc.) depending on which mode the Type-C port, port partner
+  and cable are operating in. It can also modify lane routing based on
+  the orientation of a connected Type-C peripheral.
+
+properties:
+  compatible:
+    const: typec-switch
+
+  mode-switch:
+    type: boolean
+    description: Specify that this switch can handle alternate mode switching.
+
+  orientation-switch:
+    type: boolean
+    description: Specify that this switch can handle orientation switching.
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    description: OF graph binding modelling data lines to the Type-C switch.
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Link between the switch and a Type-C connector.
+
+    required:
+      - port@0
+
+required:
+  - compatible
+  - ports
+
+anyOf:
+  - required:
+      - mode-switch
+  - required:
+      - orientation-switch
+
+additionalProperties: true
+
+examples:
+  - |
+    drm-bridge {
+        usb-switch {
+            compatible = "typec-switch";
+            mode-switch;
+            orientation-switch;
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+                    anx_ep: endpoint {
+                        remote-endpoint = <&typec_controller>;
+                    };
+                };
+            };
+        };
+    };
-- 
2.36.1.476.g0c4daa206d-goog