rtc: tps65910: Added rtc time init support

Added support for initializing rtc time
Fixed IRQ numbers in header file
Changed module name fro rtc-tps65910 to tps65910-rtc

Bug 1055083

Change-Id: I067a52ef21e58eb03331d25417062f53e45b082d
Signed-off-by: Sumit Sharma <sumsharma@nvidia.com>
Reviewed-on: http://git-master/r/144765
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>

1 files changed, 50 insertions, 4 deletions

diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 691ab967bfcb..1200930211b1 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -34,6 +34,10 @@ struct tps65910_rtc {
 /* Total number of RTC registers needed to set time*/
 #define NUM_TIME_REGS	(TPS65910_YEARS - TPS65910_SECONDS + 1)
 
+#define OS_REF_YEAR 1900
+
+#define RTC_YEAR_OFFSET 100
+
 static int tps65910_rtc_alarm_irq_enable(struct device *dev, unsigned enabled)
 {
 	struct tps65910 *tps = dev_get_drvdata(dev->parent);
@@ -45,6 +49,21 @@ static int tps65910_rtc_alarm_irq_enable(struct device *dev, unsigned enabled)
 	return regmap_write(tps->regmap, TPS65910_RTC_INTERRUPTS, val);
 }
 
+static int tps65910_rtc_valid_tm(struct rtc_time *tm)
+{
+	if (tm->tm_year >= (RTC_YEAR_OFFSET + 99)
+		|| tm->tm_year < (RTC_YEAR_OFFSET)
+		|| tm->tm_mon >= 12
+		|| tm->tm_mday < 1
+		|| tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + OS_REF_YEAR)
+		|| tm->tm_hour >= 24
+		|| tm->tm_min >= 60
+		|| tm->tm_sec >= 60)
+		return -EINVAL;
+	return 0;
+}
+
+
 /*
  * Gets current tps65910 RTC time and date parameters.
  *
@@ -230,6 +249,7 @@ static int __devinit tps65910_rtc_probe(struct platform_device *pdev)
 	int ret;
 	int irq;
 	u32 rtc_reg;
+	struct rtc_time tm;
 
 	tps65910 = dev_get_drvdata(pdev->dev.parent);
 
@@ -261,16 +281,43 @@ static int __devinit tps65910_rtc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	irq += TPS65910_IRQ_RTC_ALARM;
+	irq += platform_get_irq(pdev, 0);
+
+	rtc_reg = INT_MSK_RTC_ALARM_IT_MSK_MASK;
+	ret = regmap_write(tps65910->regmap, TPS65910_RTC_STATUS, rtc_reg);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "unable to program RTC_STATUS reg\n");
+		return ret;
+	}
+
+	rtc_reg = TPS65910_RTC_INTERRUPTS_IT_ALARM;
+	ret = regmap_write(tps65910->regmap, TPS65910_RTC_INTERRUPTS, rtc_reg);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "unable to program Interrupt Mask reg\n");
+		return ret;
+	}
+
 	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 		tps65910_rtc_interrupt, IRQF_TRIGGER_LOW,
-		"rtc-tps65910", &pdev->dev);
+		"tps65910-rtc", &pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "IRQ is not free.\n");
 		return ret;
 	}
 	device_init_wakeup(&pdev->dev, 1);
 
+	tps65910_rtc_read_time(&pdev->dev, &tm);
+
+	if (tps65910_rtc_valid_tm(&tm) < 0) {
+		if (pmic_plat_data->time.tm_year < 2000 || pmic_plat_data->time.tm_year >= 2100) {
+			memset(&pmic_plat_data->time, 0, sizeof(pmic_plat_data->time));
+			pmic_plat_data->time.tm_year = 2000;
+			pmic_plat_data->time.tm_mday = 1;
+		}
+		pmic_plat_data->time.tm_year -= OS_REF_YEAR;
+		tps65910_rtc_set_time(&pdev->dev, &pmic_plat_data->time);
+	}
+
 	tps_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
 		&tps65910_rtc_ops, THIS_MODULE);
 	if (IS_ERR(tps_rtc->rtc)) {
@@ -341,8 +388,7 @@ static struct platform_driver tps65910_rtc_driver = {
 	.remove		= __devexit_p(tps65910_rtc_remove),
 	.driver		= {
 		.owner	= THIS_MODULE,
-		.name	= "rtc-tps65910",
-		.pm	= DEV_PM_OPS,
+		.name	= "tps65910-rtc",
 	},
 };