metro rp2350: Enable USB host by default

ports/raspberrypi/boards/adafruit_metro_rp2350/board.c

@@ -4,6 +4,33 @@
 //
 // SPDX-License-Identifier: MIT
 
+#include "common-hal/microcontroller/Pin.h"
+#include "hardware/gpio.h"
+#include "shared-bindings/usb_host/Port.h"
 #include "supervisor/board.h"
 
 // Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.
+
+
+#if defined(DEFAULT_USB_HOST_5V_POWER)
+bool board_reset_pin_number(uint8_t pin_number) {
+    if (pin_number == DEFAULT_USB_HOST_5V_POWER->number) {
+        // doing this (rather than gpio_init) in this specific order ensures no
+        // glitch if pin was already configured as a high output. gpio_init() temporarily
+        // configures the pin as an input, so the power enable value would potentially
+        // glitch.
+        gpio_put(pin_number, 1);
+        gpio_set_dir(pin_number, GPIO_OUT);
+        gpio_set_function(pin_number, GPIO_FUNC_SIO);
+
+        return true;
+    }
+    return false;
+}
+#endif
+
+#if defined(DEFAULT_USB_HOST_DATA_PLUS)
+void board_init(void) {
+    common_hal_usb_host_port_construct(DEFAULT_USB_HOST_DATA_PLUS, DEFAULT_USB_HOST_DATA_MINUS);
+}
+#endif

ports/raspberrypi/boards/adafruit_metro_rp2350/mpconfigboard.h

@@ -22,4 +22,7 @@
 // #define CIRCUITPY_CONSOLE_UART_RX DEFAULT_UART_BUS_RX
 // #define CIRCUITPY_CONSOLE_UART_TX DEFAULT_UART_BUS_TX
 
+#define DEFAULT_USB_HOST_DATA_PLUS (&pin_GPIO32)
+#define DEFAULT_USB_HOST_DATA_MINUS (&pin_GPIO33)
+#define DEFAULT_USB_HOST_5V_POWER (&pin_GPIO29)
 #define CIRCUITPY_PSRAM_CHIP_SELECT (&pin_GPIO47)