1 files changed, 13 insertions, 145 deletions

diff --git a/arch/cris/kernel/time.c b/arch/cris/kernel/time.c
index 074fe7dea96..fe6acdabbc8 100644
--- a/arch/cris/kernel/time.c
+++ b/arch/cris/kernel/time.c
@@ -21,7 +21,6 @@
  *
  */
 
-#include <asm/rtc.h>
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/param.h>
@@ -32,169 +31,38 @@
 #include <linux/profile.h>
 #include <linux/sched.h>	/* just for sched_clock() - funny that */
 
-int have_rtc;  /* used to remember if we have an RTC or not */;
+
+#define D(x)
 
 #define TICK_SIZE tick
 
 extern unsigned long loops_per_jiffy; /* init/main.c */
 unsigned long loops_per_usec;
 
-extern unsigned long do_slow_gettimeoffset(void);
-static unsigned long (*do_gettimeoffset)(void) = do_slow_gettimeoffset;
-
-/*
- * This version of gettimeofday has near microsecond resolution.
- *
- * Note: Division is quite slow on CRIS and do_gettimeofday is called
- *       rather often. Maybe we should do some kind of approximation here
- *       (a naive approximation would be to divide by 1024).
- */
-void do_gettimeofday(struct timeval *tv)
+int set_rtc_mmss(unsigned long nowtime)
 {
-	unsigned long flags;
-	signed long usec, sec;
-	local_irq_save(flags);
-	usec = do_gettimeoffset();
-
-        /*
-	 * If time_adjust is negative then NTP is slowing the clock
-	 * so make sure not to go into next possible interval.
-	 * Better to lose some accuracy than have time go backwards..
-	 */
-	if (unlikely(time_adjust < 0) && usec > tickadj)
-		usec = tickadj;
-
-	sec = xtime.tv_sec;
-	usec += xtime.tv_nsec / 1000;
-	local_irq_restore(flags);
-
-	while (usec >= 1000000) {
-		usec -= 1000000;
-		sec++;
-	}
-
-	tv->tv_sec = sec;
-	tv->tv_usec = usec;
+	D(printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime));
+	return 0;
 }
 
-EXPORT_SYMBOL(do_gettimeofday);
-
-int do_settimeofday(struct timespec *tv)
+/* grab the time from the RTC chip */
+unsigned long get_cmos_time(void)
 {
-	time_t wtm_sec, sec = tv->tv_sec;
-	long wtm_nsec, nsec = tv->tv_nsec;
-
-	if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
-		return -EINVAL;
-
-	write_seqlock_irq(&xtime_lock);
-	/*
-	 * This is revolting. We need to set "xtime" correctly. However, the
-	 * value in this location is the value at the most recent update of
-	 * wall time.  Discover what correction gettimeofday() would have
-	 * made, and then undo it!
-	 */
-	nsec -= do_gettimeoffset() * NSEC_PER_USEC;
-
-	wtm_sec  = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
-	wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
-
-	set_normalized_timespec(&xtime, sec, nsec);
-	set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
-
-	ntp_clear();
-	write_sequnlock_irq(&xtime_lock);
-	clock_was_set();
 	return 0;
 }
 
-EXPORT_SYMBOL(do_settimeofday);
 
-
-/*
- * BUG: This routine does not handle hour overflow properly; it just
- *      sets the minutes. Usually you'll only notice that after reboot!
- */
-
-int set_rtc_mmss(unsigned long nowtime)
+int update_persistent_clock(struct timespec now)
 {
-	int retval = 0;
-	int real_seconds, real_minutes, cmos_minutes;
-
-	printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime);
-
-	if(!have_rtc)
-		return 0;
-
-	cmos_minutes = CMOS_READ(RTC_MINUTES);
-	cmos_minutes = bcd2bin(cmos_minutes);
-
-	/*
-	 * since we're only adjusting minutes and seconds,
-	 * don't interfere with hour overflow. This avoids
-	 * messing with unknown time zones but requires your
-	 * RTC not to be off by more than 15 minutes
-	 */
-	real_seconds = nowtime % 60;
-	real_minutes = nowtime / 60;
-	if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
-		real_minutes += 30;		/* correct for half hour time zone */
-	real_minutes %= 60;
-
-	if (abs(real_minutes - cmos_minutes) < 30) {
-		real_seconds = bin2bcd(real_seconds);
-		real_minutes = bin2bcd(real_minutes);
-		CMOS_WRITE(real_seconds,RTC_SECONDS);
-		CMOS_WRITE(real_minutes,RTC_MINUTES);
-	} else {
-		printk(KERN_WARNING
-		       "set_rtc_mmss: can't update from %d to %d\n",
-		       cmos_minutes, real_minutes);
-		retval = -1;
-	}
-
-	return retval;
+	return set_rtc_mmss(now.tv_sec);
 }
 
-/* grab the time from the RTC chip */
-
-unsigned long
-get_cmos_time(void)
+void read_persistent_clock(struct timespec *ts)
 {
-	unsigned int year, mon, day, hour, min, sec;
-
-	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);
-
-	sec = bcd2bin(sec);
-	min = bcd2bin(min);
-	hour = bcd2bin(hour);
-	day = bcd2bin(day);
-	mon = bcd2bin(mon);
-	year = bcd2bin(year);
-
-	if ((year += 1900) < 1970)
-		year += 100;
-
-	return mktime(year, mon, day, hour, min, sec);
+	ts->tv_sec = 0;
+	ts->tv_nsec = 0;
 }
 
-/* update xtime from the CMOS settings. used when /dev/rtc gets a SET_TIME.
- * TODO: this doesn't reset the fancy NTP phase stuff as do_settimeofday does.
- */
-
-void
-update_xtime_from_cmos(void)
-{
-	if(have_rtc) {
-		xtime.tv_sec = get_cmos_time();
-		xtime.tv_nsec = 0;
-	}
-}
 
 extern void cris_profile_sample(struct pt_regs* regs);
 
@@ -213,7 +81,7 @@ cris_do_profile(struct pt_regs* regs)
 
 unsigned long long sched_clock(void)
 {
-	return (unsigned long long)jiffies * (1000000000 / HZ) +
+	return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ) +
 		get_ns_in_jiffie();
 }