MTK_RTC_TM_YR_OFFSET
tm->tm_year = year + MTK_RTC_TM_YR_OFFSET;
year = tm->tm_year - MTK_RTC_TM_YR_OFFSET;
#define MTK_RTC_TM_YR_L (MTK_RTC_TM_YR_OFFSET + 1)
#define MTK_RTC_TM_YR_H (MTK_RTC_TM_YR_OFFSET + MTK_RTC_HW_YR_LIMIT)