diff --git a/Makefile b/Makefile
index 55ee25d8ab..9c5b2a5c9a 100644
--- a/Makefile
+++ b/Makefile
@@ -2535,14 +2535,7 @@ PM856_config:	unconfig
 sbc8540_config \
 sbc8540_33_config \
 sbc8540_66_config:	unconfig
-	@mkdir -p $(obj)include
-	@if [ "$(findstring _66_,$@)" ] ; then \
-		echo "#define CONFIG_PCI_66"	>>$(obj)include/config.h ; \
-		$(XECHO) "... 66 MHz PCI" ; \
-	else \
-		$(XECHO) "... 33 MHz PCI" ; \
-	fi
-	@$(MKCONFIG) -a SBC8540 ppc mpc85xx sbc8560
+	@$(MKCONFIG) -t $(@:_config=) SBC8540 ppc mpc85xx sbc8560
 
 sbc8548_config \
 sbc8548_PCI_33_config \
@@ -2554,14 +2547,7 @@ sbc8548_PCI_66_PCIE_config: unconfig
 sbc8560_config \
 sbc8560_33_config \
 sbc8560_66_config:	unconfig
-	@mkdir -p $(obj)include
-	@if [ "$(findstring _66_,$@)" ] ; then \
-		echo "#define CONFIG_PCI_66"	>>$(obj)include/config.h ; \
-		$(XECHO) "... 66 MHz PCI" ; \
-	else \
-		$(XECHO) "... 33 MHz PCI" ; \
-	fi
-	@$(MKCONFIG) -a sbc8560 ppc mpc85xx sbc8560
+	@$(MKCONFIG) -t $(@:_config=) sbc8560 ppc mpc85xx sbc8560
 
 socrates_config:	unconfig
 	@$(MKCONFIG) $(@:_config=) ppc mpc85xx socrates
diff --git a/include/configs/SBC8540.h b/include/configs/SBC8540.h
index 272b5dd56c..7cde39bf2a 100644
--- a/include/configs/SBC8540.h
+++ b/include/configs/SBC8540.h
@@ -24,22 +24,25 @@
  * MA 02111-1307 USA
  */
 
-/* mpc8560ads board configuration file */
-/* please refer to doc/README.mpc85xx for more info */
-/* make sure you change the MAC address and other network params first,
- * search for CONFIG_ETHADDR,CONFIG_SERVERIP,etc in this file
+/*
+ * sbc8540 board configuration file.
  */
 
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#if XXX
-#define DEBUG		      /* General debug */
-#define ET_DEBUG
+/*
+ * Top level Makefile configuration choices
+ */
+#ifdef CONFIG_MK_66
+#define CONFIG_PCI_66
 #endif
+
 #define TSEC_DEBUG
 
-/* High Level Configuration Options */
+/*
+ * High Level Configuration Options
+ */
 #define CONFIG_BOOKE		1	/* BOOKE			*/
 #define CONFIG_E500		1	/* BOOKE e500 family		*/
 #define CONFIG_MPC85xx		1	/* MPC8540/MPC8560		*/
diff --git a/include/configs/sbc8560.h b/include/configs/sbc8560.h
index 46c94bf16b..a6b15f74c9 100644
--- a/include/configs/sbc8560.h
+++ b/include/configs/sbc8560.h
@@ -24,16 +24,23 @@
  * MA 02111-1307 USA
  */
 
-/* sbc8560 board configuration file */
-/* please refer to doc/README.sbc8560 for more info */
-/* make sure you change the MAC address and other network params first,
- * search for CONFIG_ETHADDR,CONFIG_SERVERIP,etc in this file
+/*
+ * sbc8560 board configuration file.
  */
 
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-/* High Level Configuration Options */
+/*
+ * Top level Makefile configuration choices
+ */
+#ifdef CONFIG_MK_66
+#define CONFIG_PCI_66
+#endif
+
+/*
+ * High Level Configuration Options
+ */
 #define CONFIG_BOOKE		1	/* BOOKE			*/
 #define CONFIG_E500		1	/* BOOKE e500 family		*/
 #define CONFIG_MPC85xx		1	/* MPC8540/MPC8560		*/