boards: st: stm32n6570_dk: Enable OTG HS peripheral

Enable the USB OTG HS node of the stm32n6570_dk board

Signed-off-by: IBEN EL HADJ MESSAOUD Marwa <marwa.ibenelhadjmessaoud-ext@st.com>

Author: marwaiehm-st

boards/st/stm32n6570_dk/doc/index.rst

@@ -66,6 +66,36 @@ Supported Features
 
 .. zephyr:board-supported-hw::
 
+USB
+===
+
+The USB pin assignments on the STM32N657XX microcontroller are immutable. This means that the specific
+pins designated for USB functionality are fixed and cannot be changed or reassigned to other functions,
+ensuring consistent and reliable USB communication.
+
+USB PIN (IOs)
+=============
+
++------------------+--------------------------------------+
+| Name             | Description                          |
++==================+======================================+
+| OTG1_HSDM        | USB OTG1 High-Speed Data- (negative) |
++------------------+--------------------------------------+
+| OTG1_HSDP        | USB OTG1 High-Speed Data+ (positive) |
++------------------+--------------------------------------+
+| OTG1_ID          | USB OTG1 ID Pin                      |
++------------------+--------------------------------------+
+| OTG1_TXRTUNE     | USB OTG1 Transmit Retune             |
++------------------+--------------------------------------+
+| OTG2_HSDM        | USB OTG2 High-Speed Data- (negative) |
++------------------+--------------------------------------+
+| OTG2_HSDP        | USB OTG2 High-Speed Data+ (positive) |
++------------------+--------------------------------------+
+| OTG2_ID          | USB OTG2 ID Pin                      |
++------------------+--------------------------------------+
+| OTG2_TXRTUNE     | USB OTG2 Transmit Retune             |
++------------------+--------------------------------------+
+
 Connections and IOs
 ===================
 

boards/st/stm32n6570_dk/stm32n6570_dk_common.dtsi

@@ -45,6 +45,12 @@
 	};
 };
 
+&clk_hse {
+	hse-div2;
+	clock-frequency = <DT_FREQ_M(48)>;
+	status = "okay";
+};
+
 &clk_hsi {
 	hsi-div = <1>;
 	status = "okay";
@@ -191,6 +197,9 @@
 	pinctrl-0 = <&usart2_tx_pd5 &usart2_rx_pf6>;
 	pinctrl-names = "default";
 	current-speed = <115200>;
+};
+
+zephyr_udc0: &usbotg_hs1 {
 	status = "okay";
 };
 

boards/st/stm32n6570_dk/twister.yaml

@@ -16,6 +16,7 @@ supported:
   - memc
   - spi
   - uart
+  - usb_device
 variants:
   stm32n6570_dk/stm32n657xx:
     twister: false