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rtc: fix year calculation in max77851 pmic rtc

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Add +100 to year only if PMIC does not have separate alarm
enable registers. Since MAX77851 has separate alarm enable register
, MAX77851 RTC supports year calculation from 0..199 so we do not need
to add 100 on reading RTC YEAR register. Currently, default, driver is
adding +100 which is wrong. This change fixes rtc year calculation.

Bug 200749982

Change-Id: Ibaf1d2fb81e59cc21c22d509cf9ffc7b6005916c
Signed-off-by: Shubhi Garg <shgarg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.10/+/2727859
(cherry picked from commit b43364942c67fdf7958a42bfad5fe02725da00e3)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-5.10/+/2728926
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2947785
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Tested-by: Bitan Biswas <bbiswas@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Shubhi Garg
2022-06-13 10:31:45 +00:00
committed by mobile promotions
parent 5b1a5fc4b6
commit b60b757d9c
1 changed files with 4 additions and 1 deletions
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5
drivers/rtc/rtc-max77851.c
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@@ -240,9 +240,12 @@ 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,