[MTD] of_device-based physmap driver

inlined below is the patch that adds physmap driver for of_device.
It's an MTD part of the two-part support for flash/ROM devices based
on Open Firmware descriptions. The arch part (currently only PowerPC
which is no surprise) was introduced to powerpc folks earlier and
recently the older version of the powerpc part has been included into
the powerpc.git tree
(see http://www.kernel.org/git/?p=linux/kernel/git/paulus/powerpc.git;a=commitdiff;h=28f9ec349ae47c91768b7bc5607db4442c818e11).

 drivers/mtd/maps/Kconfig      |    9 +
 drivers/mtd/maps/Makefile     |    1
 drivers/mtd/maps/physmap_of.c |  255 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 265 insertions(+)

Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: Sergey Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index fa7466886fd6..4a51a3d639be 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -60,6 +60,15 @@ config MTD_PHYSMAP_BANKWIDTH
           Ignore this option if you use run-time physmap configuration
           (i.e., run-time calling physmap_configure()).
 
+config MTD_PHYSMAP_OF
+        tristate "Flash device in physical memory map based on OF descirption"
+        depends on PPC_OF && (MTD_CFI || MTD_JEDECPROBE || MTD_ROM)
+        help
+          This provides a 'mapping' driver which allows the NOR Flash and
+          ROM driver code to communicate with chips which are mapped
+          physically into the CPU's memory. The mapping description here is
+          taken from OF device tree.
+
 config MTD_SUN_UFLASH
         tristate "Sun Microsystems userflash support"
         depends on SPARC && MTD_CFI