rtc: AB3100 RTC support

This adds support for the RTC found inside the AB3100 Mixed Signal chip.
The symbols used for communicating with the chip is found in the
mfd/ab3100-core.c driver that also provides the platform device.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Alessandro Zummo <alessandro.zummo@towertech.it>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index b136299a237e..73771b09fbd3 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -545,6 +545,15 @@ config RTC_DRV_PCF50633
           If you say yes here you get support for the RTC subsystem of the
           NXP PCF50633 used in embedded systems.
 
+config RTC_DRV_AB3100
+        tristate "ST-Ericsson AB3100 RTC"
+        depends on AB3100_CORE
+        default y if AB3100_CORE
+        help
+          Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
+          support. This chip contains a battery- and capacitor-backed RTC.
+
+
 comment "on-CPU RTC drivers"
 
 config RTC_DRV_OMAP