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rtc: mt6397: fix build on some 32bits platforms

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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 <[email protected]>
Acked-by: Eddie Huang <[email protected]>
Signed-off-by: Alexandre Belloni <[email protected]>
This commit is contained in:
Alexandre Belloni 2015-05-14 22:39:06 +02:00
commit 9393996761
1 changed files with 3 additions and 2 deletions
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5
drivers/rtc/rtc-mt6397.c
View file

@ -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;