[PATCH v4 1/2] dt-bindings: usb: Add binding for discrete onboard USB hubs

[Matthias Kaehlcke]

Discrete onboard USB hubs (an example for such a hub is the Realtek
RTS5411) need to be powered and may require initialization of other
resources (like GPIOs or clocks) to work properly. This adds a device
tree binding for these hubs.

Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
---

(no changes since v3)

Changes in v3:
- updated commit message
- removed recursive reference to $self
- adjusted 'compatible' definition to support multiple entries
- changed USB controller phandle to be a node

Changes in v2:
- removed 'wakeup-source' and 'power-off-in-suspend' properties
- consistently use spaces for indentation in example

 .../bindings/usb/onboard_usb_hub.yaml         | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml

diff --git a/Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml b/Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml
new file mode 100644
index 000000000000..c9783da3e75c
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/onboard_usb_hub.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/onboard_usb_hub.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Binding for onboard USB hubs
+
+maintainers:
+  - Matthias Kaehlcke <mka@xxxxxxxxxxxx>
+
+properties:
+  compatible:
+    items:
+      - enum:
+        - realtek,rts5411
+      - const: onboard-usb-hub
+
+  vdd-supply:
+    description:
+      phandle to the regulator that provides power to the hub.
+
+required:
+  - compatible
+  - vdd-supply
+
+examples:
+  - |
+    usb_hub: usb-hub {
+        compatible = "realtek,rts5411", "onboard-usb-hub";
+        vdd-supply = <&pp3300_hub>;
+    };
+
+    usb_controller {
+        dr_mode = "host";
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* 2.0 hub on port 1 */
+        hub@1 {
+            compatible = "usbbda,5411";
+            reg = <1>;
+            hub = <&usb_hub>;
+        };
+
+        /* 3.0 hub on port 2 */
+        hub@2 {
+            compatible = "usbbda,411";
+            reg = <2>;
+            hub = <&usb_hub>;
+        };
+    };
+
+...
-- 
2.28.0.709.gb0816b6eb0-goog