[PATCH v3 1/2] dt-bindings: usb: dwc3: Document Renesas R-Car Gen5 DWC3 xHCI USB controller

The Renesas R-Car Gen5 SoC contains multiple instances of DWC3 USB
controller with glue logic wrapper around them. Document the glue
logic and DWC3 controller.

Signed-off-by: Marek Vasut <[email protected]>
---
Cc: Conor Dooley <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Krzysztof Kozlowski <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Thinh Nguyen <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
---
V2: Rework to use flat bindings for generic plat driver
V3: - Support one or two PHYs to correctly describe the hardware
    - Make maximum-speed optional
---
 .../bindings/usb/renesas,rcar-gen5-dwc3.yaml  | 81 +++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/renesas,rcar-gen5-dwc3.yaml

diff --git a/Documentation/devicetree/bindings/usb/renesas,rcar-gen5-dwc3.yaml b/Documentation/devicetree/bindings/usb/renesas,rcar-gen5-dwc3.yaml
new file mode 100644
index 0000000000000..37944a7d5be04
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/renesas,rcar-gen5-dwc3.yaml
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/renesas,rcar-gen5-dwc3.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car Gen5 DWC3 xHCI USB controller
+
+maintainers:
+  - Marek Vasut <[email protected]>
+
+properties:
+  compatible:
+    items:
+      - const: renesas,r8a78000-dwc3
+      - const: renesas,rcar-gen5-dwc3
+
+  reg:
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: dwc3
+      - const: glue
+
+  clocks:
+    maxItems: 1
+
+  dr_mode:
+    enum: [ host, otg, peripheral ]
+
+  interrupts:
+    maxItems: 1
+
+  maximum-speed:
+    enum: [ super-speed-plus, super-speed, high-speed ]
+
+  phys:
+    minItems: 1
+    maxItems: 2
+
+  phy-names:
+    minItems: 1
+    items:
+      - const: usb2-phy
+      - const: usb3-phy
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - clocks
+  - interrupts
+  - phys
+  - phy-names
+  - power-domains
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    usb@c8800000 {
+        compatible = "renesas,r8a78000-dwc3", "renesas,rcar-gen5-dwc3";
+        reg = <0xc8800000 0x100000>, <0xc9c54000 0x2000>;
+        reg-names = "dwc3", "glue";
+        clocks = <&scmi_clk 336>;
+        interrupts = <GIC_SPI 795 IRQ_TYPE_LEVEL_HIGH>;
+        phys = <&usb30_phy>, <&mp_phy 2>;
+        phy-names = "usb2-phy", "usb3-phy";
+        power-domains = <&scmi_devpd 16>;
+        resets = <&scmi_reset 336>;
+    };
-- 
2.53.0