linux-kernel - [PATCH v1 2/3] rtc: da9052: Add constraints to set valid year

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Date:	Wed, 4 Mar 2015 16:13:13 +0000
From:	Adam Ward <adam.ward.opensource@...semi.com>
To:	Alessandro Zummo <a.zummo@...ertech.it>
CC:	Support Opensource <support.opensource@...semi.com>,
	<rtc-linux@...glegroups.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 2/3] rtc: da9052: Add constraints to set valid year

Signed-off-by: Adam Ward <adam.ward.opensource@...semi.com>
Tested-by: Adam Ward <adam.ward.opensource@...semi.com>
---
 drivers/rtc/rtc-da9052.c | 8 ++++++++
 1 file changed, 8 insertions(+)

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;
-- 
end-of-patch for rtc: da9052: Corrections to access, validation and capability

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