diff --git a/arch/arm/src/efm32/efm32_rtc.h b/arch/arm/src/efm32/efm32_rtc.h
new file mode 100644
index 0000000000..ba86e2da2c
--- /dev/null
+++ b/arch/arm/src/efm32/efm32_rtc.h
@@ -0,0 +1,96 @@
+/*****************************************************************************
+ * arch/arm/src/efm32/efm32_rtc.h
+ *
+ *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_EFM32_EFM32_RTC_H
+#define __ARCH_ARM_SRC_EFM32_EFM32_RTC_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/* The form of an alarm callback */
+
+typedef void (*alarmcb_t)(void);
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/************************************************************************************
+ * Name: efm32_rtc_setalarm
+ *
+ * Description:
+ *   Set up an alarm.
+ *
+ * Input Parameters:
+ *   tp - the time to set the alarm
+ *   callback - the function to call when the alarm expires.
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno on failure
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_RTC_ALARM
+struct timespec;
+int efm32_rtc_setalarm(FAR const struct timespec *tp, alarmcb_t callback);
+#endif
+
+/************************************************************************************
+ * Name: efm32_rtc_cancelalarm
+ *
+ * Description:
+ *   Cancel a pending alarm alarm
+ *
+ * Input Parameters:
+ *   none
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno on failure
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_RTC_ALARM
+int efm32_rtc_cancelalarm(void);
+#endif
+
+#endif /* __ARCH_ARM_SRC_EFM32_EFM32_RTC_H */
+