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Subject[PATCH v2 3/3] rtc: st-lpc: make it robust against y2038/2106 bug
Date
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>
---
drivers/rtc/rtc-st-lpc.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 74c0a33..82b0af1 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)
--
1.9.1
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