[MTD] Driver for AT26Fxxx dataflash devices

Add support for AT26Fxxx dataflash devices. These devices have a quite different
commandset than the AT45xxx chips, which are handled by at91_dataflash.c, so a
combined driver turned out to be more ugly than useful.

Tested only on AT26F004.
Signed-off-by: Hans-Jürgen Koch <hjk@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

drivers/mtd/devices/Kconfig

@@ -60,6 +60,14 @@ config MTD_DATAFLASH
 	  Sometimes DataFlash chips are packaged inside MMC-format
 	  cards; at this writing, the MMC stack won't handle those.
 
+config MTD_DATAFLASH26
+	tristate "AT91RM9200 DataFlash AT26xxx"
+	depends on MTD && ARCH_AT91RM9200 && AT91_SPI
+	help
+	  This enables access to the DataFlash chip (AT26xxx) on an
+	  AT91RM9200-based board.
+	  If you have such a board and such a DataFlash, say 'Y'.
+
 config MTD_M25P80
 	tristate "Support for M25 SPI Flash"
 	depends on MTD && SPI_MASTER && EXPERIMENTAL

drivers/mtd/devices/Makefile

@@ -16,4 +16,5 @@ obj-$(CONFIG_MTD_MTDRAM)	+= mtdram.o
 obj-$(CONFIG_MTD_LART)		+= lart.o
 obj-$(CONFIG_MTD_BLOCK2MTD)	+= block2mtd.o
 obj-$(CONFIG_MTD_DATAFLASH)	+= mtd_dataflash.o
+obj-$(CONFIG_MTD_DATAFLASH26)	+= at91_dataflash26.o
 obj-$(CONFIG_MTD_M25P80)	+= m25p80.o