iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

rtc: ds1511: drop useless computation

Browse Source 
All the callers of ds1511_rtc_set_time will use the same epoch for tm_year
which is defined as the number of years minus 1900 since POSIX.1-2001.

Link: https://lore.kernel.org/r/20240227230431.1837717-2-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2024-02-28 00:04:17 +01:00
parent f4282a4303
commit 4e7a9e2ea2
1 changed files with 1 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/rtc/rtc-ds1511.c
View File

@ -166,24 +166,13 @@ ds1511_wdog_disable(void)
}
#endif
/*
* set the rtc chip's idea of the time.
* stupidly, some callers call with year unmolested;
* and some call with year = year - 1900. thanks.
*/
static int ds1511_rtc_set_time(struct device *dev, struct rtc_time *rtc_tm)
{
u8 mon, day, dow, hrs, min, sec, yrs, cen;
unsigned long flags;
/*
* won't have to change this for a while
*/
if (rtc_tm->tm_year < 1900)
rtc_tm->tm_year += 1900;
yrs = rtc_tm->tm_year % 100;
cen = rtc_tm->tm_year / 100;
cen = 19 + rtc_tm->tm_year / 100;
mon = rtc_tm->tm_mon + 1; /* tm_mon starts at zero */
day = rtc_tm->tm_mday;
dow = rtc_tm->tm_wday & 0x7; /* automatic BCD */