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authorBenjamin Gaignard <benjamin.gaignard@linaro.org>2017-06-19 12:36:22 +0300
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2017-07-09 23:32:18 +0300
commitf4b82d39e40fc9c3493826abb49c64c37c7025b9 (patch)
tree3d6ea46760fa2dd1b789b20e6ab7e419c80dc6db /drivers/rtc
parent69c31226fc9f887dcd5c27a91f5cc0f244a6953e (diff)
downloadlinux-f4b82d39e40fc9c3493826abb49c64c37c7025b9.tar.xz
rtc: st-lpc: make it robust against y2038/2106 bug
Make driver use u64 variables and functions to be sure that it will support dates after year 2038. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Acked-by: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-st-lpc.c19
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 74c0a336ceea..82b0af159a28 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -99,7 +99,7 @@ static int st_rtc_read_time(struct device *dev, struct rtc_time *tm)
lpt = ((unsigned long long)lpt_msb << 32) | lpt_lsb;
do_div(lpt, rtc->clkrate);
- rtc_time_to_tm(lpt, tm);
+ rtc_time64_to_tm(lpt, tm);
return 0;
}
@@ -107,13 +107,10 @@ static int st_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int st_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct st_rtc *rtc = dev_get_drvdata(dev);
- unsigned long long lpt;
- unsigned long secs, flags;
- int ret;
+ unsigned long long lpt, secs;
+ unsigned long flags;
- ret = rtc_tm_to_time(tm, &secs);
- if (ret)
- return ret;
+ secs = rtc_tm_to_time64(tm);
lpt = (unsigned long long)secs * rtc->clkrate;
@@ -161,13 +158,13 @@ static int st_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct st_rtc *rtc = dev_get_drvdata(dev);
struct rtc_time now;
- unsigned long now_secs;
- unsigned long alarm_secs;
+ unsigned long long now_secs;
+ unsigned long long alarm_secs;
unsigned long long lpa;
st_rtc_read_time(dev, &now);
- rtc_tm_to_time(&now, &now_secs);
- rtc_tm_to_time(&t->time, &alarm_secs);
+ now_secs = rtc_tm_to_time64(&now);
+ alarm_secs = rtc_tm_to_time64(&t->time);
/* Invalid alarm time */
if (now_secs > alarm_secs)