[PATCH 1/4] dt-bindings: usb: add Realtek RTS5453H Type-C port controller

[Gary Yang <gary.yang@cixtech.com>]

Document the Realtek RTS5453H stand-alone USB Type-C port controller.
The controller is connected over I2C and manages a single USB Type-C
connector, described with the generic USB connector binding.

The connector's OF graph links to the Type-C orientation switch and
mode mux provided by the platform PHY.

Signed-off-by: Gary Yang <gary.yang@cixtech.com>
---
 .../bindings/usb/realtek,rts5453h.yaml        | 126 ++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/realtek,rts5453h.yaml

diff --git a/Documentation/devicetree/bindings/usb/realtek,rts5453h.yaml b/Documentation/devicetree/bindings/usb/realtek,rts5453h.yaml
new file mode 100644
index 000000000000..535aa2379427
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/realtek,rts5453h.yaml
@@ -0,0 +1,126 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/realtek,rts5453h.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek RTS5453H USB Type-C port controller
+
+description: |
+  The RTS5453H is a stand-alone USB Type-C port controller with USB
+  Power Delivery support. It is controlled over I2C and reports
+  changes of the port state through an interrupt line.
+
+  Orientation switching and USB/DisplayPort lane muxing are performed by
+  the platform PHY. The controller finds the Type-C switch and mux
+  through the OF graph of its connector node.
+
+maintainers:
+  - Gary Yang <gary.yang@cixtech.com>
+
+properties:
+  compatible:
+    const: realtek,rts5453h
+
+  reg:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  interrupts:
+    maxItems: 1
+
+patternProperties:
+  '^connector@[0-9a-f]+$':
+    type: object
+    $ref: /schemas/connector/usb-connector.yaml#
+    unevaluatedProperties: false
+    description:
+      The USB Type-C connector managed by this controller.
+
+    required:
+      - reg
+      - data-role
+      - power-role
+      - try-power-role
+
+required:
+  - compatible
+  - reg
+  - '#address-cells'
+  - '#size-cells'
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        typec@30 {
+            compatible = "realtek,rts5453h";
+            reg = <0x30>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+            interrupt-parent = <&gpio0>;
+            interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
+
+            connector@0 {
+                compatible = "usb-c-connector";
+                reg = <0>;
+                data-role = "host";
+                power-role = "source";
+                try-power-role = "source";
+
+                ports {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+
+                    port@0 {
+                        reg = <0>;
+
+                        typec_hs_ep: endpoint {
+                            remote-endpoint = <&usb_hs_ep>;
+                        };
+                    };
+
+                    port@1 {
+                        reg = <1>;
+
+                        typec_ss_ep: endpoint {
+                            remote-endpoint = <&usb_ss_ep>;
+                        };
+                    };
+                };
+            };
+        };
+    };
+
+    usb {
+        usb-role-switch;
+
+        port {
+            usb_hs_ep: endpoint {
+                remote-endpoint = <&typec_hs_ep>;
+            };
+        };
+    };
+
+    usb-mux {
+        orientation-switch;
+        mode-switch;
+
+        port {
+            usb_ss_ep: endpoint {
+                remote-endpoint = <&typec_ss_ep>;
+            };
+        };
+    };
-- 
2.50.1