On some !ARM 32bits platforms, the following compilation error happens
because of the division on a 64bits value in mtk_rtc_read_time():
drivers/built-in.o: In function `mtk_rtc_read_time':
rtc-mt6397.c:(.text+0x265d13f): undefined reference to `__divdi3'
rtc-mt6397.c:(.text+0x265d150): undefined reference to `__moddi3'
Use div_s64() as done in rtc_time64_to_tm() to solve that.
Reported-by: kbuild test robot <fengguang...@intel.com>
Signed-off-by: Alexandre Belloni <alexandre.bell...@free-electrons.com>
---
drivers/rtc/rtc-mt6397.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c
index 8bed852e4961..c0090b698ff3 100644
--- a/drivers/rtc/rtc-mt6397.c
+++ b/drivers/rtc/rtc-mt6397.c
@@ -150,7 +150,7 @@ static int mtk_rtc_read_time(struct device *dev, struct
rtc_time *tm)
{
time64_t time;
struct mt6397_rtc *rtc = dev_get_drvdata(dev);
- int sec, ret;
+ int days, sec, ret;
do {
ret = __mtk_rtc_read_time(rtc, tm, &sec);
@@ -171,7 +171,8 @@ static int mtk_rtc_read_time(struct device *dev, struct
rtc_time *tm)
/* rtc_tm_to_time64 covert Gregorian date to seconds since
* 01-01-1970 00:00:00, and this date is Thursday.
*/
- tm->tm_wday = (time / 86400 + 4) % 7;
+ days = div_s64(time, 86400);
+ tm->tm_wday = (days + 4) % 7;
exit:
return ret;
--
2.1.4
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