mtd: nand: split out ECC module

This way drivers could use ecc routines without depedency on whole nand
Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/Kconfig

@@ -307,8 +307,9 @@ config SSFDC
 
 config SM_FTL
 	tristate "SmartMedia/xD new translation layer"
-	depends on EXPERIMENTAL && BLOCK && MTD_NAND
+	depends on EXPERIMENTAL && BLOCK
 	select MTD_BLKDEVS
+	select MTD_NAND_ECC
 	help
 	  This enables new and very EXPERMENTAL support for SmartMedia/xD
 	  FTL (Flash translation layer).

drivers/mtd/nand/Kconfig

@@ -2,11 +2,23 @@ menuconfig MTD_NAND
 	tristate "NAND Device Support"
 	depends on MTD
 	select MTD_NAND_IDS
+	select MTD_NAND_ECC
 	help
 	  This enables support for accessing all type of NAND flash
 	  devices. For further information see
 	  <http://www.linux-mtd.infradead.org/doc/nand.html>.
 
+config MTD_NAND_ECC
+	tristate
+
+config MTD_NAND_ECC_SMC
+	bool "NAND ECC Smart Media byte order"
+	depends on MTD_NAND_ECC
+	default n
+	help
+	  Software ECC according to the Smart Media Specification.
+	  The original Linux implementation had byte 0 and 1 swapped.
+
 if MTD_NAND
 
 config MTD_NAND_VERIFY_WRITE
@@ -18,13 +30,6 @@ config MTD_NAND_VERIFY_WRITE
 	  device thinks the write was successful, a bit could have been
 	  flipped accidentally due to device wear or something else.
 
-config MTD_NAND_ECC_SMC
-	bool "NAND ECC Smart Media byte order"
-	default n
-	help
-	  Software ECC according to the Smart Media Specification.
-	  The original Linux implementation had byte 0 and 1 swapped.
-
 config MTD_SM_COMMON
 	tristate
 	default n

drivers/mtd/nand/Makefile

@@ -2,7 +2,8 @@
 # linux/drivers/nand/Makefile
 #
 
-obj-$(CONFIG_MTD_NAND)			+= nand.o nand_ecc.o
+obj-$(CONFIG_MTD_NAND)			+= nand.o
+obj-$(CONFIG_MTD_NAND_ECC)		+= nand_ecc.o
 obj-$(CONFIG_MTD_NAND_IDS)		+= nand_ids.o
 obj-$(CONFIG_MTD_SM_COMMON) 		+= sm_common.o