RTC_TIME
mv_rtc_reg_write(sc, RTC_TIME, 0);
mv_rtc_reg_write(sc, RTC_TIME, 0);
val = mv_rtc_reg_read(sc, RTC_TIME);
val_check = mv_rtc_reg_read(sc, RTC_TIME);
mv_rtc_reg_write(sc, RTC_TIME, ts->tv_sec);