+int update_persistent_clock(struct timespec now)
+{
+ return set_rtc_mmss(now.tv_sec);
+}
+
+void read_persistent_clock(struct timespec *ts)
+{
+ unsigned int year, mon, day, hour, min, sec, epoch;
+
+ sec = CMOS_READ(RTC_SECONDS);
+ min = CMOS_READ(RTC_MINUTES);
+ hour = CMOS_READ(RTC_HOURS);
+ day = CMOS_READ(RTC_DAY_OF_MONTH);
+ mon = CMOS_READ(RTC_MONTH);
+ year = CMOS_READ(RTC_YEAR);
+
+ if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+ sec = bcd2bin(sec);
+ min = bcd2bin(min);
+ hour = bcd2bin(hour);
+ day = bcd2bin(day);
+ mon = bcd2bin(mon);
+ year = bcd2bin(year);
+ }
+
+ /* PC-like is standard; used for year >= 70 */
+ epoch = 1900;
+ if (year < 20)
+ epoch = 2000;
+ else if (year >= 20 && year < 48)
+ /* NT epoch */
+ epoch = 1980;
+ else if (year >= 48 && year < 70)
+ /* Digital UNIX epoch */
+ epoch = 1952;
+
+ printk(KERN_INFO "Using epoch = %d\n", epoch);
+
+ if ((year += epoch) < 1970)
+ year += 100;
+
+ ts->tv_sec = mktime(year, mon, day, hour, min, sec);
+}
+
+
+