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[v1,2/3] rtc: da9052: Add constraints to set valid year

Message ID cb6d2528ac81589cd6d816ef1745daa6ca1e0610.1425490310.git.adam.ward.opensource@diasemi.com
State Accepted
Headers show

Commit Message

Adam Ward March 4, 2015, 4:13 p.m. UTC 
Signed-off-by: Adam Ward <adam.ward.opensource@diasemi.com>
Tested-by: Adam Ward <adam.ward.opensource@diasemi.com>
---
 drivers/rtc/rtc-da9052.c | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c
index ead02fa..acc3e5a 100644
--- a/drivers/rtc/rtc-da9052.c
+++ b/drivers/rtc/rtc-da9052.c
@@ -206,6 +206,10 @@  static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	uint8_t v[6];
 	int ret;

+	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
+	if ((tm->tm_year < 100) || (tm->tm_year > 163))
+		return -EINVAL;
+
 	rtc = dev_get_drvdata(dev);

 	v[0] = tm->tm_sec;
@@ -243,6 +247,10 @@  static int da9052_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 	struct rtc_time *tm = &alrm->time;
 	struct da9052_rtc *rtc = dev_get_drvdata(dev);

+	/* DA9052 only has 6 bits for year - to represent 2000-2063 */
+	if ((tm->tm_year < 100) || (tm->tm_year > 163))
+		return -EINVAL;
+
 	ret = da9052_rtc_enable_alarm(rtc, 0);
 	if (ret < 0)
 		return ret;