dts: bindings: apollo4p: Add USB Nodes

Add USB node to apollo4p qualifier, and apollo4p_evb board to enable
USB support on the MCU and its EVB.

Signed-off-by: Chew Zeh Yang <[email protected]>

Author: zeonchew

boards/ambiq/apollo4p_evb/apollo4p_evb.dts

@@ -141,6 +141,12 @@ compatible = "ambiq,adc";
 	};
 };
 
+zephyr_udc0: &usb {
+	vddusb33-gpios = <&gpio96_127 7 (GPIO_PULL_UP)>;
+	vddusb0p9-gpios = <&gpio96_127 5 (GPIO_PULL_UP)>;
+	status = "okay";
+};
+
 &gpio0_31 {
 	status = "okay";
 };

dts/arm/ambiq/ambiq_apollo4p.dtsi

@@ -338,6 +338,16 @@
 			status = "disabled";
 		};
 
+		usb: usb@400b0000 {
+			compatible = "ambiq,usb";
+			reg = <0x400B0000 0x4100>;
+			interrupts = <27 0>;
+			num-bidir-endpoints = <6>;
+			maximum-speed = "full-speed";
+			status = "disabled";
+			ambiq,pwrcfg = <&pwrcfg 0x4 0x400000>;
+		};
+
 		pinctrl: pin-controller@40010000 {
 			compatible = "ambiq,apollo4-pinctrl";
 			reg = <0x40010000 0x800>;