From 0dc70108b8dc5915e701dd5356be99c8aa5fb794 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sat, 21 Feb 2015 17:51:03 -0600
Subject: [PATCH] STM32: Fix for compilation introduced by last backup RAM
 change.  Not sure it it is correct, be now things do compile

---
 arch/arm/src/stm32/stm32_pwr.c | 2 ++
 arch/arm/src/stm32/stm32_pwr.h | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/arch/arm/src/stm32/stm32_pwr.c b/arch/arm/src/stm32/stm32_pwr.c
index 73febc5180b..e535ae2bc81 100644
--- a/arch/arm/src/stm32/stm32_pwr.c
+++ b/arch/arm/src/stm32/stm32_pwr.c
@@ -131,6 +131,7 @@ void stm32_pwr_enablebkp(bool writable)
  *
  ************************************************************************************/
 
+#if defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F40XX)
 void stm32_pwr_enablebreg(bool regon)
 {
   uint16_t regval;
@@ -145,6 +146,7 @@ void stm32_pwr_enablebreg(bool regon)
       while ((stm32_pwr_getreg(STM32_PWR_CSR_OFFSET) & PWR_CSR_BRR) == 0);
     }
 }
+#endif
 
 /************************************************************************************
  * Name: stm32_pwr_setvos
diff --git a/arch/arm/src/stm32/stm32_pwr.h b/arch/arm/src/stm32/stm32_pwr.h
index 7559531a0e3..46efb06a0b2 100644
--- a/arch/arm/src/stm32/stm32_pwr.h
+++ b/arch/arm/src/stm32/stm32_pwr.h
@@ -102,7 +102,11 @@ void stm32_pwr_enablebkp(bool writable);
  *
  ************************************************************************************/
 
+#if defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F40XX)
 void stm32_pwr_enablebreg(bool regon);
+#else
+#  define stm32_pwr_enablebreg(regon)
+#endif
 
 /************************************************************************************
  * Name: stm32_pwr_setvos