DISCO_L475VG_IOT01A: Add a list of restricted GPIO pins for testing

Author: mprse

targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L475xG/TARGET_DISCO_L475VG_IOT01A/PeripheralPins.c

@@ -31,3 +31,23 @@
 #include "PeripheralPins.h"
 #include "mbed_toolchain.h"
 #include "PeripheralPinMaps.h"
+
+// List of GPIOs with limited functionality
+const PinList *pinmap_gpio_restricted_pins()
+{
+    static const PinName pins[] = {
+        PB_8,  // fixed pull-up (for I2C)
+        PB_9,  // fixed pull-up (for I2C)
+        PB_10, // fixed pull-up (for I2C)
+        PB_11, // fixed pull-up (for I2C)
+        PC_14, // OSC32_IN
+        PC_15, // OSC32_OUT
+        PH_0,  // OSC_IN
+        PH_1   // OSC_OUT
+    };
+    static const PinList pin_list = {
+        sizeof(pins) / sizeof(pins[0]),
+        pins
+    };
+    return &pin_list;
+}