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diff --git a/nuttx/arch/arm/src/stm32/stm32f40xxx_rcc.c b/nuttx/arch/arm/src/stm32/stm32f40xxx_rcc.c
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+/****************************************************************************
+ * arch/arm/src/stm32/stm32f40xxx_rcc.c
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: rcc_reset
+ *
+ * Description:
+ * Put all RCC registers in reset state
+ *
+ ****************************************************************************/
+
+static inline void rcc_reset(void)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: rcc_enableahb1
+ *
+ * Description:
+ * Enable selected AHB1 peripherals
+ *
+ ****************************************************************************/
+
+static inline void rcc_enableahb1(void)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: rcc_enableahb2
+ *
+ * Description:
+ * Enable selected AHB2 peripherals
+ *
+ ****************************************************************************/
+
+static inline void rcc_enableahb2(void)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: rcc_enableahb3
+ *
+ * Description:
+ * Enable selected AHB3 peripherals
+ *
+ ****************************************************************************/
+
+static inline void rcc_enableahb3(void)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: rcc_enableapb1
+ *
+ * Description:
+ * Enable selected APB1 peripherals
+ *
+ ****************************************************************************/
+
+static inline void rcc_enableapb1(void)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: rcc_enableapb2
+ *
+ * Description:
+ * Enable selected APB2 peripherals
+ *
+ ****************************************************************************/
+
+static inline void rcc_enableapb2(void)
+{
+#warning "Missing logic"
+}
+
+/****************************************************************************
+ * Name: stm32_stdclockconfig
+ *
+ * Description:
+ * Called to change to new clock based on settings in board.h
+ *
+ * NOTE: This logic would need to be extended if you need to select low-
+ * power clocking modes!
+ ****************************************************************************/
+
+#ifndef CONFIG_ARCH_BOARD_STM32_CUSTOM_CLOCKCONFIG
+static inline void stm32_stdclockconfig(void)
+{
+#warning "Missing logic"
+}
+#endif
+
+/****************************************************************************
+ * Name: rcc_enableperiphals
+ ****************************************************************************/
+
+static inline void rcc_enableperipherals(void)
+{
+ rcc_enableahb1();
+ rcc_enableahb2();
+ rcc_enableahb3();
+ rcc_enableapb1();
+ rcc_enableapb2();
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/