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diff --git a/tos/platforms/mulle/chips/rv8564/HplRV8564P.nc b/tos/platforms/mulle/chips/rv8564/HplRV8564P.nc
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+/*
+ * Copyright (c) 2009 Communication Group and Eislab at
+ * Lulea University of Technology
+ *
+ * Contact: Laurynas Riliskis, LTU
+ * Mail: laurynas.riliskis@ltu.se
+ * All rights reserved.
+ *
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - 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.
+ * - Neither the name of Communication Group at Lulea University of Technology
+ *   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 STANFORD
+ * UNIVERSITY OR ITS 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.
+ */
+
+/**
+ * Implementation of the RV-8564-C2 real time clock.
+ *
+ * @author Henrik Makitaavola <henrik.makitaavola@gmail.com>
+ */
+
+#include "rv8564.h"
+#include "I2C.h"
+module HplRV8564P
+{
+  provides interface HplRV8564 as RTC;
+  provides interface Init;
+
+  uses interface GeneralIO as CLKOE;
+  uses interface GeneralIO as CLKOUT;
+  uses interface GeneralIO;
+  uses interface GpioInterrupt;
+  uses interface I2CPacket<TI2CBasicAddr> as I2C;
+  uses interface Resource as I2CResource;
+}
+implementation
+{
+
+  enum
+  {
+    S_IDLE,
+    S_READING,
+    S_WRITING
+  };
+  norace uint8_t m_state = S_IDLE;
+  uint8_t m_buf[2];
+
+  command error_t Init.init()
+  {
+    call CLKOUT.makeInput();
+    call CLKOE.clr();
+    call CLKOE.makeOutput();
+  }
+
+  command void RTC.enableCLKOUT()
+  {
+    call CLKOE.set();
+  }
+
+  command void RTC.disableCLKOUT()
+  {
+    call CLKOE.clr();
+  }
+
+  command void RTC.enableInterrupt()
+  {
+    call GpioInterrupt.enableFallingEdge();
+  }
+
+  command void RTC.disableInterrupt()
+  {
+    call GpioInterrupt.disable();
+  }
+
+  command error_t RTC.readRegister(uint8_t reg)
+  {
+    if (m_state != S_IDLE)
+    {	
+      return EBUSY;
+    }
+    m_state = S_READING;
+    m_buf[0] = reg;
+    if (call I2CResource.request() == SUCCESS)
+    {
+      return SUCCESS;
+    }
+    else
+    {
+      m_state = S_IDLE;
+      return FAIL;
+    }
+    return SUCCESS;
+  }
+
+  command error_t RTC.writeRegister(uint8_t reg, uint8_t value)
+  { 
+    if (m_state != S_IDLE)
+    {
+      return FAIL;
+    }
+    m_state = S_WRITING;
+    atomic m_buf[0] = reg;
+    atomic m_buf[1] = value;
+    if (call I2CResource.request() == SUCCESS)
+    {
+      return SUCCESS;
+    }
+    else
+    {
+      m_state = S_IDLE;
+      return FAIL;
+    }
+  }
+
+  event void I2CResource.granted()
+  {
+    atomic
+    {
+      if (m_state == S_READING)
+      {
+        call I2C.write(I2C_START | I2C_STOP, RV8564_ADDR, 1, m_buf);
+      }
+      else if (m_state == S_WRITING)
+      {
+        call I2C.write(I2C_START | I2C_STOP, RV8564_ADDR, 2, m_buf);    
+      }
+    }	
+  }
+
+  async event void GpioInterrupt.fired()
+  {
+    signal RTC.fired();
+  }
+
+  async event void I2C.readDone(error_t error, uint16_t addr, uint8_t length, uint8_t* data)
+  {
+    atomic
+    {
+      if (m_state == S_READING && data == m_buf)
+      {
+        call I2CResource.release();
+        m_state = S_IDLE;
+        signal RTC.readRegisterDone(error, m_buf[0], m_buf[1]);
+      }	
+    }
+  }
+
+  async event void I2C.writeDone(error_t error, uint16_t addr, uint8_t length, uint8_t* data)
+  {
+    if (m_state == S_READING)
+    {
+      if (error != SUCCESS)
+      {
+        call I2CResource.release();
+        m_state = S_IDLE;
+        signal RTC.readRegisterDone(error, m_buf[0], 0);
+        return;
+      }
+      else
+      {
+        call I2C.read(I2C_START | I2C_STOP, RV8564_ADDR, 1, m_buf + 1);
+      }
+    }
+    else if (m_state == S_WRITING)
+    {
+      call I2CResource.release();
+      m_state = S_IDLE;
+      signal RTC.writeRegisterDone(error, m_buf[0]);
+    }
+  }
+}