[PATCH v1 2/2] doc: dt: bindings: usb: realtek,dwc3: Add Realtek DHC RTD SoC DWC3 USB

[Stanley Chang <stanley_chang@realtek.com>]

Document the DWC3 USB bindings for Realtek SoCs.

Signed-off-by: Stanley Chang <stanley_chang@realtek.com>
---
 .../devicetree/bindings/usb/realtek,dwc3.yaml | 107 ++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/realtek,dwc3.yaml

diff --git a/Documentation/devicetree/bindings/usb/realtek,dwc3.yaml b/Documentation/devicetree/bindings/usb/realtek,dwc3.yaml
new file mode 100644
index 000000000000..74d388809924
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/realtek,dwc3.yaml
@@ -0,0 +1,107 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Realtek Semiconductor Corporation
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/usb/realtek,dwc3.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Realtek DWC3 USB SoC Controller Glue
+
+maintainers:
+  - Stanley Chang <stanley_chang@realtek.com>
+
+description:
+  The Realtek DHC SoC embeds a DWC3 USB IP Core configured for USB 2.0
+  and USB 3.0 in host or dual-role mode.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - realtek,rtd1295-dwc3
+          - realtek,rtd1315e-dwc3
+          - realtek,rtd1319-dwc3
+          - realtek,rtd1319d-dwc3
+          - realtek,rtd1395-dwc3
+          - realtek,rtd1619-dwc3
+          - realtek,rtd1619b-dwc3
+      - const: realtek,rtd-dwc3
+
+  reg:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+  ranges: true
+
+  realtek,unlink-usb3-port:
+    description: Disable link between USB 3.0 PHY and USB mac.
+      Only for RTD1619 SoC, if the board design support maximum 2.0 speed.
+    type: boolean
+
+  realtek,disable-usb3-phy:
+    description: Close USB 3.0 PHY if the board design not support USB 3.0.
+    type: boolean
+
+  realtek,enable-l4icg:
+    description: Enable the power saving feature l4icg by hardware clock.
+      gating.
+    type: boolean
+
+patternProperties:
+  "^usb@[0-9a-f]+$":
+    $ref: snps,dwc3.yaml#
+    description: Required child node
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+
+allOf:
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - realtek,rtd1619-dwc3
+    then:
+      properties:
+        realtek,unlink-usb3-port: false
+
+additionalProperties: false
+
+examples:
+  - |
+    usb@98013e00 {
+        compatible = "realtek,rtd1319d-dwc3", "realtek,rtd-dwc3";
+        reg = <0x98013e00 0x200>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+        status = "okay";
+        realtek,disable-usb3-phy;
+        realtek,enable-l4icg;
+
+        usb@98050000 {
+            compatible = "snps,dwc3";
+            reg = <0x98050000 0x9000>;
+            interrupts = <0 94 4>;
+            phys = <&usb2phy &usb3phy>;
+            phy-names = "usb2-phy", "usb3-phy";
+            dr_mode = "otg";
+            usb-role-switch;
+            role-switch-default-mode = "host";
+            snps,dis_u2_susphy_quirk;
+            snps,parkmode-disable-ss-quirk;
+            snps,parkmode-disable-hs-quirk;
+            maximum-speed = "high-speed";
+        };
+    };
-- 
2.34.1