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authorSebastian Siewior <bigeasy@linutronix.de>2008-04-28 05:43:01 -0400
committerGreg Ungerer <gerg@uclinux.org>2008-07-23 01:11:28 -0400
commit95469bd64a7a9ab405b566deb8c81d4aaf67ed9e (patch)
tree737b6971940e46bba0467e9808f6b101ce3cdb37 /arch/m68knommu/kernel/time.c
parent0df185f5a1430ab8b437be402d286ee0728ef9f8 (diff)
m68knommu: complete generic time
do_set_rtc() isn't required because the work that is handled is allready served if read_persistent_clock() & update_persistent_clock() are implemented and CONFIG_GENERIC_CMOS_UPDATE is. sync_cmos_clock() looks very familiar :) Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68knommu/kernel/time.c')
-rw-r--r--arch/m68knommu/kernel/time.c38
1 files changed, 10 insertions, 28 deletions
diff --git a/arch/m68knommu/kernel/time.c b/arch/m68knommu/kernel/time.c
index d33ed9a84cc7..67944aa27280 100644
--- a/arch/m68knommu/kernel/time.c
+++ b/arch/m68knommu/kernel/time.c
@@ -33,27 +33,6 @@ static inline int set_rtc_mmss(unsigned long nowtime)
33 return -1; 33 return -1;
34} 34}
35 35
36static inline void do_set_rtc(void)
37{
38 /* last time the cmos clock got updated */
39 static long last_rtc_update=0;
40
41 /*
42 * If we have an externally synchronized Linux clock, then update
43 * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
44 * called as close as possible to 500 ms before the new second starts.
45 */
46 if (ntp_synced() &&
47 xtime.tv_sec > last_rtc_update + 660 &&
48 (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 &&
49 (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) {
50 if (set_rtc_mmss(xtime.tv_sec) == 0)
51 last_rtc_update = xtime.tv_sec;
52 else
53 last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
54 }
55}
56
57/* 36/*
58 * timer_interrupt() needs to keep up the real-time clock, 37 * timer_interrupt() needs to keep up the real-time clock,
59 * as well as call the "do_timer()" routine every clocktick 38 * as well as call the "do_timer()" routine every clocktick
@@ -68,8 +47,6 @@ irqreturn_t arch_timer_interrupt(int irq, void *dummy)
68 47
69 do_timer(1); 48 do_timer(1);
70 49
71 do_set_rtc();
72
73 write_sequnlock(&xtime_lock); 50 write_sequnlock(&xtime_lock);
74 51
75#ifndef CONFIG_SMP 52#ifndef CONFIG_SMP
@@ -93,12 +70,17 @@ static unsigned long read_rtc_mmss(void)
93 return mktime(year, mon, day, hour, min, sec);; 70 return mktime(year, mon, day, hour, min, sec);;
94} 71}
95 72
96void time_init(void) 73unsigned long read_persistent_clock(void)
74{
75 return read_rtc_mmss();
76}
77
78int update_persistent_clock(struct timespec now)
97{ 79{
98 xtime.tv_sec = read_rtc_mmss(); 80 return set_rtc_mmss(now.tv_sec);
99 xtime.tv_nsec = 0; 81}
100 wall_to_monotonic.tv_sec = -xtime.tv_sec;
101 82
83void time_init(void)
84{
102 hw_timer_init(); 85 hw_timer_init();
103} 86}
104