Import Mbed OS hard-float snapshot

targets/TARGET_Silicon_Labs/TARGET_EFM32/pinmap_function.c

@@ -0,0 +1,63 @@
+/***************************************************************************//**
+ * @file pinmap_function.c
+ *******************************************************************************
+ * @section License
+ * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
+ *******************************************************************************
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************/
+
+#include "pinmap_function.h"
+#include "PinNames.h"
+#include "mbed_error.h"
+
+/**
+ * Get the value of the function field for a pin in a pinmap
+ * @param pin A pin
+ * @param map A pinmap for a given peripheral
+ * @return Content of function field in pinmap for the given pin
+ */
+uint32_t pinmap_get_function_field(PinName pin, const PinMap *map)
+{
+    while (map->pin != NC) {
+        if (map->pin == pin) {
+            return map->function;
+        }
+        map++;
+    }
+    return (uint32_t) NC;
+}
+
+/**
+ * Get the location a given peripheral is routed to from pin
+ * This is stored in the function field of the pinmap
+ * @param pin The pin
+ * @param map Pinmap for the given peripheral
+ * @return uint32 describing location (0, 1, 2, ...)
+ */
+uint32_t pin_location(PinName pin, const PinMap *map)
+{
+    if (pin == (PinName) NC) {
+        return (uint32_t) NC;
+    }
+
+    uint32_t location = pinmap_get_function_field(pin, map);
+    if ((uint32_t) NC == location) { // no mapping available
+        error("location not found for pin");
+    }
+    return location;
+}