rtc: driver for Marvell's SoCs 88F6281 and 88F6192

Driver for the on-chip RTC found in some of Marvell's SoCs such as the
Kirkwood 88F6281 and 88F6192 devices.

Signed-off-by: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index e374bf0..4ad831d 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -712,4 +712,15 @@
 	  Driver for the internal RTC (Realtime Clock) module found on
 	  Toshiba TX4939 SoC.
 
+config RTC_DRV_MV
+	tristate "Marvell SoC RTC"
+	depends on ARCH_KIRKWOOD
+	help
+	  If you say yes here you will get support for the in-chip RTC
+	  that can be found in some of Marvell's SoC devices, such as
+	  the Kirkwood 88F6281 and 88F6192.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-mv.
+
 endif # RTC_CLASS