dt-bindings: usb: dwc3: add support for StarFive JHB100

Add support for the USB 2.0 Dual-Role Device (DRD) controller embedded
in the StarFive JHB100 SoC. The controller is based on the Synopsys
DesignWare Core USB 3 (DWC3) IP.

Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260410112500.90432-2-minda.chen@starfivetech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/usb/starfive,jhb100-dwc3.yaml b/Documentation/devicetree/bindings/usb/starfive,jhb100-dwc3.yaml
new file mode 100644
index 000000000000..fbabe99e9d5c
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/starfive,jhb100-dwc3.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/starfive,jhb100-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JHB100 DWC3 USB SoC Controller
+
+maintainers:
+  - Minda Chen <minda.chen@starfivetech.com>
+
+description:
+  The USB DRD controller on JHB100 BMC SoC.
+
+allOf:
+  - $ref: snps,dwc3-common.yaml#
+
+properties:
+  compatible:
+    const: starfive,jhb100-dwc3
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: USB main enable clk
+      - description: DWC3 bus early clock
+      - description: DWC3 ref clock
+
+  clock-names:
+    items:
+      - const: main
+      - const: bus_early
+      - const: ref
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    usb@11800000 {
+        compatible = "starfive,jhb100-dwc3";
+        reg = <0x11800000 0x10000>;
+        clocks = <&usbcrg 9>,
+                 <&usbcrg 5>,
+                 <&usbcrg 6>;
+        clock-names = "main", "bus_early", "ref";
+        resets = <&usbcrg 4>;
+        interrupts = <105>;
+        dr_mode = "host";
+    };