Don't initialize SDRAM if it is not being used

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2456 42af7a65-404d-4744-a932-0658087f49c3

configs/ea3131/src/ea3131_internal.h

@@ -82,7 +82,9 @@
  *
  ****************************************************************************/
 
+#ifdef CONFIG_LPC313X_EXTSDRAM
 extern void lpc313x_sdraminitialize(void);
+#endif
 
 /************************************************************************************
  * Name: lpc313x_spiinitialize

configs/ea3131/src/up_boot.c

@@ -75,7 +75,9 @@ void lpc313x_boardinitialize(void)
 {
   /* Configure Micron MT48LC32M16A2 SDRAM on the EA3131 board */
 
+#ifdef CONFIG_LPC313X_EXTSDRAM
   lpc313x_sdraminitialize();
+#endif
 
   /* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function
    * lpc313x_spiinitialize() has been brought into the link.

configs/ea3131/src/up_sdram.c

@@ -55,6 +55,8 @@
 #include "lpc313x_cgudrvr.h"
 #include "ea3131_internal.h"
 
+#ifdef CONFIG_LPC313X_EXTSDRAM
+
 /****************************************************************************
  * Definitions
  ****************************************************************************/
@@ -265,3 +267,4 @@ void lpc313x_sdraminitialize(void)
 
   putreg32((MPMC_DYNCONTROL_INORMAL|MPMC_DYNCONTROL_CS), LPC313X_MPMC_DYNCONTROL);
 }
+#endif /* CONFIG_LPC313X_EXTSDRAM */