rtc: Add a driver for Micro Crystal RV8803

This driver supports the following functions:
 - reading and settings time
 - alarms when connected to an IRQ
 - reading and clearing the voltage low flags
 - nvram

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 57c2dbc..2a52424 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -593,6 +593,15 @@
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-rv3029c2.
 
+config RTC_DRV_RV8803
+	tristate "Micro Crystal RV8803"
+	help
+	  If you say yes here you get support for the Micro Crystal
+	  RV8803 RTC chips.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-rv8803.
+
 config RTC_DRV_S5M
 	tristate "Samsung S2M/S5M series"
 	depends on MFD_SEC_CORE