From 5b46df9c49b690eee77a281d2b0aee49a7df0141 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 29 Jul 2015 17:37:35 -0600
Subject: [PATCH] Fix compile error from last ADC change

---
 arch/arm/src/stm32/stm32_adc.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm/src/stm32/stm32_adc.c b/arch/arm/src/stm32/stm32_adc.c
index c84c0d1527..a0434cdb08 100644
--- a/arch/arm/src/stm32/stm32_adc.c
+++ b/arch/arm/src/stm32/stm32_adc.c
@@ -1217,6 +1217,9 @@ static void adc_enable(FAR struct stm32_dev_s *priv, bool enable)
 
   avdbg("enable: %d\n", (enable ? 1 : 0));
 
+  /* Not all STM32 parts prove the SR ADONS bit */
+
+#ifdef ADC_SR_ADONS
   regval = adc_getreg(priv, STM32_ADC_SR_OFFSET);
 
   if (!(regval & ADC_SR_ADONS) && enable)
@@ -1230,6 +1233,18 @@ static void adc_enable(FAR struct stm32_dev_s *priv, bool enable)
       regval &= ~ADC_CR2_ADON;
     }
 
+#else
+  regval  = adc_getreg(priv, STM32_ADC_CR2_OFFSET);
+  if (enable)
+    {
+      regval |= ADC_CR2_ADON;
+    }
+  else
+    {
+      regval &= ~ADC_CR2_ADON;
+    }
+#endif
+
   adc_putreg(priv, STM32_ADC_CR2_OFFSET, regval);
 }