mfd: Add rtc support to 88pm860x

Enable rtc function in 88pm860x PMIC.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/include/linux/mfd/88pm860x.h b/include/linux/mfd/88pm860x.h
index 8fba797..63b4fb8 100644
--- a/include/linux/mfd/88pm860x.h
+++ b/include/linux/mfd/88pm860x.h
@@ -330,6 +330,11 @@
 	unsigned long	flags;
 };
 
+struct pm860x_rtc_pdata {
+	int		(*sync)(unsigned int ticks);
+	int		vrtc;
+};
+
 struct pm860x_touch_pdata {
 	int		gpadc_prebias;
 	int		slot_cycle;
@@ -349,6 +354,7 @@
 struct pm860x_platform_data {
 	struct pm860x_backlight_pdata	*backlight;
 	struct pm860x_led_pdata		*led;
+	struct pm860x_rtc_pdata		*rtc;
 	struct pm860x_touch_pdata	*touch;
 	struct pm860x_power_pdata	*power;
 	struct regulator_init_data	*regulator;