linux-kernel - [PATCH 03/22] dt-bindings: usb: Add downstream facing ports to realtek binding

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Date: Fri,  9 Feb 2024 23:09:14 -0800
From: Stephen Boyd <swboyd@...omium.org>
To: chrome-platform@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org,
	patches@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	Douglas Anderson <dianders@...omium.org>,
	Pin-yen Lin <treapking@...omium.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Kaehlcke <mka@...omium.org>,
	linux-usb@...r.kernel.org,
	maciek swiech <drmasquatch@...gle.com>
Subject: [PATCH 03/22] dt-bindings: usb: Add downstream facing ports to realtek binding

Add a graph with 4 output endpoints to this hub binding to support the
scenario where a downstream facing port is connected to a device that
isn't a connector or a USB device with a VID:PID. This will be used to
connect downstream facing ports to USB type-c switches so the USB
superspeed and high speed lanes can be put onto USB connectors.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: Conor Dooley <conor+dt@...nel.org>
Cc: Matthias Kaehlcke <mka@...omium.org>
Cc: <linux-usb@...r.kernel.org>
Cc: <devicetree@...r.kernel.org>
Cc: Pin-yen Lin <treapking@...omium.org>
Cc: maciek swiech <drmasquatch@...gle.com>
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
 .../bindings/usb/realtek,rts5411.yaml         | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml b/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml
index f0784d2e86da..5480a31698be 100644
--- a/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml
+++ b/Documentation/devicetree/bindings/usb/realtek,rts5411.yaml
@@ -21,6 +21,12 @@ properties:
 
   reg: true
 
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
   vdd-supply:
     description:
       phandle to the regulator that provides power to the hub.
@@ -30,6 +36,36 @@ properties:
     description:
       phandle to the peer hub on the controller.
 
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description:
+          1st downstream facing USB port
+
+      port@2:
+        $ref: /schemas/graph.yaml#/properties/port
+        description:
+          2nd downstream facing USB port
+
+      port@3:
+        $ref: /schemas/graph.yaml#/properties/port
+        description:
+          3rd downstream facing USB port
+
+      port@4:
+        $ref: /schemas/graph.yaml#/properties/port
+        description:
+          4th downstream facing USB port
+
+patternProperties:
+  "^.*@[1-4]$":
+    description: The hard wired USB devices
+    type: object
+    $ref: /schemas/usb/usb-device.yaml
+
 required:
   - peer-hub
   - compatible
@@ -50,6 +86,11 @@ examples:
             reg = <1>;
             vdd-supply = <&pp3300_hub>;
             peer-hub = <&hub_3_0>;
+            /* USB 2.0 device on port 2 */
+            device@2 {
+                compatible = "usb123,4567";
+                reg = <2>;
+            };
         };
 
         /* 3.0 hub on port 2 */
@@ -58,5 +99,14 @@ examples:
             reg = <2>;
             vdd-supply = <&pp3300_hub>;
             peer-hub = <&hub_2_0>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                port@0 {
+                    reg = <0>;
+                    remote-endpoint = <&usb_a0_ss>;
+                };
+            };
         };
     };
-- 
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