[PATCH 1/1] dt-bindings: usb: add layerscape super speed usb support

[Frank Li <Frank.Li@nxp.com>]

Add missed binding doc for layerscape dwc3 usb controller.

Fix below warning:
arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-kbox-a-230-ls.dtb: /soc/usb@3100000:
	failed to match any schema with compatible: ['fsl,ls1028a-dwc3', 'snps,dwc3']

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 .../devicetree/bindings/usb/fsl,ls1028a.yaml  | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/fsl,ls1028a.yaml

diff --git a/Documentation/devicetree/bindings/usb/fsl,ls1028a.yaml b/Documentation/devicetree/bindings/usb/fsl,ls1028a.yaml
new file mode 100644
index 0000000000000..a44bdf391887f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/fsl,ls1028a.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/fsl,ls1028a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale layerscape SuperSpeed DWC3 USB SoC controller
+
+maintainers:
+  - Frank Li <Frank.Li@nxp.com>
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - fsl,ls1028a-dwc3
+  required:
+    - compatible
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - fsl,ls1028a-dwc3
+      - const: snps,dwc3
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: snps,dwc3.yaml#
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    usb@fe800000 {
+        compatible = "fsl,ls1028a-dwc3", "snps,dwc3";
+        reg = <0xfe800000 0x100000>;
+        interrupts = <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>;
+    };
-- 
2.34.1