dts: arm: st: stm32u3: Add USB DTS node

Add USB DTS node for STM32U3 series SoCs.

Signed-off-by: Will McGloughlin <[email protected]>

Author: wymcg

dts/arm/st/u3/stm32u3.dtsi

@@ -401,6 +401,25 @@
 				STM32_DMA_16BITS)>;
 			status = "disabled";
 		};
+
+		usb: usb@40016000 {
+			compatible = "st,stm32-usb";
+			reg = <0x40016000 0x400>;
+			interrupts = <73 0>;
+			interrupt-names = "usb";
+			num-bidir-endpoints = <8>;
+			ram-size = <2048>;
+			maximum-speed = "full-speed";
+			clocks = <&rcc STM32_CLOCK(APB2, 24)>,
+				 <&rcc STM32_SRC_HSI48 ICLK_SEL(0)>;
+			phys = <&usb_fs_phy>;
+			status = "disabled";
+		};
+	};
+	
+	usb_fs_phy: usb_fs_phy {
+		compatible = "usb-nop-xceiv";
+		#phy-cells = <0>;
 	};
 };