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Revert "Revert "rtc: fix year calculation in max77851 pmic rtc""

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This reverts commit 40b9876e2f277472677c22b947da7260cf39626e.

Reason for revert:
Initial change to fix year calculation is correct.
We do not need to blindly add +100 in year value. RTC_YEAR
register can accomodate values from 0..199. Being year base 1900
and valid rtc time being 1970, valid year values are 1970..2099.

Bug 4911320

Change-Id: Ic4183f4d85e4612b6a5a7ab53baf0483b7b6acad
Signed-off-by: Shubhi Garg <shgarg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3283957
Reviewed-by: Evan Wei <evwei@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
This commit is contained in:
Shubhi Garg
2025-01-15 06:30:03 +00:00
committed by Jon Hunter
parent ee357025ee
commit c3fdf73467
1 changed files with 4 additions and 1 deletions
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5
drivers/rtc/rtc-max77851.c
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@@ -242,9 +242,12 @@ static void max77851_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
tm->tm_wday = ffs(data[RTC_WEEKDAY] & mask) - 1; tm->tm_wday = ffs(data[RTC_WEEKDAY] & mask) - 1;
tm->tm_mday = data[RTC_DATE] & 0x1f; tm->tm_mday = data[RTC_DATE] & 0x1f;
tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1; tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
tm->tm_year = (data[RTC_YEAR] & mask) + 100; tm->tm_year = (data[RTC_YEAR] & mask);
tm->tm_yday = 0; tm->tm_yday = 0;
tm->tm_isdst = 0; tm->tm_isdst = 0;
if (!info->drv_data->alarm_enable_reg)
tm->tm_year += 100;
} }
static int max77851_rtc_tm_to_data(struct rtc_time *tm, u8 *data, static int max77851_rtc_tm_to_data(struct rtc_time *tm, u8 *data,