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>

drivers/mfd/88pm860x-core.c

@@ -90,6 +90,10 @@ static struct resource charger_resources[] __devinitdata = {
 	{PM8607_IRQ_VCHG, PM8607_IRQ_VCHG, "vchg voltage",    IORESOURCE_IRQ,},
 };
 
+static struct resource rtc_resources[] __devinitdata = {
+	{PM8607_IRQ_RTC, PM8607_IRQ_RTC, "rtc", IORESOURCE_IRQ,},
+};
+
 static struct mfd_cell bk_devs[] = {
 	{"88pm860x-backlight", 0,},
 	{"88pm860x-backlight", 1,},
@@ -143,6 +147,10 @@ static struct mfd_cell power_devs[] = {
 	{"88pm860x-charger", -1,},
 };
 
+static struct mfd_cell rtc_devs[] = {
+	{"88pm860x-rtc", -1,},
+};
+
 static struct pm860x_backlight_pdata bk_pdata[ARRAY_SIZE(bk_devs)];
 static struct pm860x_led_pdata led_pdata[ARRAY_SIZE(led_devs)];
 static struct regulator_init_data regulator_pdata[ARRAY_SIZE(regulator_devs)];
@@ -635,6 +643,26 @@ static void __devinit device_regulator_init(struct pm860x_chip *chip,
 	return;
 }
 
+static void __devinit device_rtc_init(struct pm860x_chip *chip,
+				      struct i2c_client *i2c,
+				      struct pm860x_platform_data *pdata)
+{
+	int ret;
+
+	if ((pdata == NULL))
+		return;
+
+	rtc_devs[0].platform_data = pdata->rtc;
+	rtc_devs[0].pdata_size = sizeof(struct pm860x_rtc_pdata);
+	rtc_devs[0].num_resources = ARRAY_SIZE(rtc_resources);
+	rtc_devs[0].resources = &rtc_resources[0];
+	ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
+			      ARRAY_SIZE(rtc_devs), &rtc_resources[0],
+			      chip->irq_base);
+	if (ret < 0)
+		dev_err(chip->dev, "Failed to add rtc subdev\n");
+}
+
 static void __devinit device_touch_init(struct pm860x_chip *chip,
 					struct i2c_client *i2c,
 					struct pm860x_platform_data *pdata)
@@ -770,6 +798,7 @@ static void __devinit device_8607_init(struct pm860x_chip *chip,
 		goto out;
 
 	device_regulator_init(chip, i2c, pdata);
+	device_rtc_init(chip, i2c, pdata);
 	device_onkey_init(chip, i2c, pdata);
 	device_touch_init(chip, i2c, pdata);
 	device_power_init(chip, i2c, pdata);

drivers/rtc/Kconfig

@@ -125,6 +125,16 @@ comment "I2C RTC drivers"
 
 if I2C
 
+config RTC_DRV_88PM860X
+	tristate "Marvell 88PM860x"
+	depends on RTC_CLASS && I2C && MFD_88PM860X
+	help
+	  If you say yes here you get support for RTC function in Marvell
+	  88PM860x chips.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called rtc-88pm860x.
+
 config RTC_DRV_DS1307
 	tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
 	help

drivers/rtc/Makefile

@@ -15,6 +15,7 @@ rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o
 
 # Keep the list ordered.
 
+obj-$(CONFIG_RTC_DRV_88PM860X)  += rtc-88pm860x.o
 obj-$(CONFIG_RTC_DRV_AB3100)	+= rtc-ab3100.o
 obj-$(CONFIG_RTC_DRV_AB8500)	+= rtc-ab8500.o
 obj-$(CONFIG_RTC_DRV_AT32AP700X)+= rtc-at32ap700x.o

include/linux/mfd/88pm860x.h

@@ -330,6 +330,11 @@ struct pm860x_led_pdata {
 	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_power_pdata {
 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;