powerpc/8xxx: Move fsl_is_spd() into generic 8xxx ddr code

Move the parsing of hwconfig to determine if to use spd into common code
so we can share it across all boards instead of duplicating it
everywhere.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/cpu/mpc8xxx/ddr/options.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008, 2010 Freescale Semiconductor, Inc.
+ * Copyright 2008, 2010-2011 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
@@ -387,3 +387,23 @@ void check_interleaving_options(fsl_ddr_info_t *pinfo)
 				"Memory controller interleaving disabled.\n");
 	}
 }
+
+int fsl_use_spd(void)
+{
+	int use_spd = 0;
+
+#ifdef CONFIG_DDR_SPD
+	/* if hwconfig is not enabled, or "sdram" is not defined, use spd */
+	if (hwconfig_sub("fsl_ddr", "sdram")) {
+		if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "spd"))
+			use_spd = 1;
+		else if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "fixed"))
+			use_spd = 0;
+		else
+			use_spd = 1;
+	} else
+		use_spd = 1;
+#endif
+
+	return use_spd;
+}

arch/powerpc/include/asm/fsl_ddr_sdram.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008-2010 Freescale Semiconductor, Inc.
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -213,6 +213,7 @@ typedef struct memctl_options_s {
 } memctl_options_t;
 
 extern phys_size_t fsl_ddr_sdram(void);
+extern int fsl_use_spd(void);
 
 /*
  * The 85xx boards have a common prototype for fixed_sdram so put the

board/freescale/corenet_ds/ddr.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2010 Freescale Semiconductor, Inc.
+ * Copyright 2009-2011 Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -288,24 +288,10 @@ void fsl_ddr_board_options(memctl_options_t *popts,
 phys_size_t initdram(int board_type)
 {
 	phys_size_t dram_size;
-	int use_spd = 0;
 
 	puts("Initializing....");
 
-#ifdef CONFIG_DDR_SPD
-	/* if hwconfig is not enabled, or "sdram" is not defined, use spd */
-	if (hwconfig_sub("fsl_ddr", "sdram")) {
-		if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "spd"))
-			use_spd = 1;
-		else if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "fixed"))
-			use_spd = 0;
-		else
-			use_spd = 1;
-	} else
-		use_spd = 1;
-#endif
-
-	if (use_spd) {
+	if (fsl_use_spd()) {
 		puts("using SPD\n");
 		dram_size = fsl_ddr_sdram();
 	} else {