rtc: explicitly set tm_sec = 0 for drivers with minute accurancy

Since all time members of the alarm data is initialized to -1 the drivers
are responsible to set the tm_sec member to 0.

Fixes: d68778b80dd7 ("rtc: initialize output parameter for read alarm to "uninitialized"")
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

drivers/rtc/rtc-da9052.c

@@ -85,6 +85,7 @@ static int da9052_read_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
 			rtc_tm->tm_mday = v[0][2] & DA9052_RTC_DAY;
 			rtc_tm->tm_hour = v[0][1] & DA9052_RTC_HOUR;
 			rtc_tm->tm_min  = v[0][0] & DA9052_RTC_MIN;
+			rtc_tm->tm_sec = 0;
 
 			ret = rtc_valid_tm(rtc_tm);
 			return ret;

drivers/rtc/rtc-da9055.c

@@ -74,6 +74,7 @@ static int da9055_read_alarm(struct da9055 *da9055, struct rtc_time *rtc_tm)
 	rtc_tm->tm_mday = v[2] & DA9055_RTC_ALM_DAY;
 	rtc_tm->tm_hour = v[1] & DA9055_RTC_ALM_HOUR;
 	rtc_tm->tm_min  = v[0] & DA9055_RTC_ALM_MIN;
+	rtc_tm->tm_sec = 0;
 
 	return rtc_valid_tm(rtc_tm);
 }

drivers/rtc/rtc-davinci.c

@@ -388,6 +388,8 @@ static int davinci_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 	u8 day0, day1;
 	unsigned long flags;
 
+	alm->time.tm_sec = 0;
+
 	spin_lock_irqsave(&davinci_rtc_lock, flags);
 
 	davinci_rtcss_calendar_wait(davinci_rtc);

drivers/rtc/rtc-pcf8563.c

@@ -341,6 +341,7 @@ static int pcf8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm)
 		"%s: raw data is min=%02x, hr=%02x, mday=%02x, wday=%02x\n",
 		__func__, buf[0], buf[1], buf[2], buf[3]);
 
+	tm->time.tm_sec = 0;
 	tm->time.tm_min = bcd2bin(buf[0] & 0x7F);
 	tm->time.tm_hour = bcd2bin(buf[1] & 0x3F);
 	tm->time.tm_mday = bcd2bin(buf[2] & 0x3F);

drivers/rtc/rtc-rc5t583.c

@@ -128,6 +128,7 @@ static int rc5t583_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 		return ret;
 	}
 
+	alm->time.tm_sec = 0;
 	alm->time.tm_min = bcd2bin(alarm_data[0]);
 	alm->time.tm_hour = bcd2bin(alarm_data[1]);
 	alm->time.tm_mday = bcd2bin(alarm_data[2]);