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authorLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 15:17:19 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 15:17:19 -0400
commit3fde80e94c2bbffbb13f5faa3340cf438440ebea (patch)
tree43eeac74dc34596772b9d9883e9208da8ae84184 /arch/m68knommu/kernel/time.c
parentac9f80ad16e6e934b6c1f12f82d27889c0f9abcc (diff)
parent9b0e74102494971ca37a425c63031fea68bb5b79 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68knommu: put ColdFire head code into .text.head section m68knommu: remove last use of CONFIG_FADS and CONFIG_RPXCLASSIC m68knommu: remove RPXCLASSIC from the m68k tree m68knommu: fec: remove FADS m68knommu: MCF5307 PIT GENERIC_CLOCKEVENTS support m68knommu: add read_barrier_depends() and irqs_disabled_flags() m68knommu: add byteswap assembly opcode for ISA A+ m68knommu: add ffs and __ffs plattform which support ISA A+ or ISA C m68knommu: add sched_clock() for the DMA timer m68knommu: complete generic time m68knommu: move code within time.c m68knommu: m68knommu: add old stack trace method m68knommu: Add Coldfire DMA Timer support m68knommu: defconfig for M5407C3 board m68knommu: defconfig for M5307C3 board m68knommu: defconfig for M5275EVB board m68knommu: defconfig for M5249EVB board m68knommu: change to a configs directory for board configurations
Diffstat (limited to 'arch/m68knommu/kernel/time.c')
-rw-r--r--arch/m68knommu/kernel/time.c40
1 files changed, 18 insertions, 22 deletions
diff --git a/arch/m68knommu/kernel/time.c b/arch/m68knommu/kernel/time.c
index 0ccfb2ad6380..d182b2f72211 100644
--- a/arch/m68knommu/kernel/time.c
+++ b/arch/m68knommu/kernel/time.c
@@ -33,14 +33,13 @@ static inline int set_rtc_mmss(unsigned long nowtime)
33 return -1; 33 return -1;
34} 34}
35 35
36#ifndef CONFIG_GENERIC_CLOCKEVENTS
36/* 37/*
37 * timer_interrupt() needs to keep up the real-time clock, 38 * timer_interrupt() needs to keep up the real-time clock,
38 * as well as call the "do_timer()" routine every clocktick 39 * as well as call the "do_timer()" routine every clocktick
39 */ 40 */
40irqreturn_t arch_timer_interrupt(int irq, void *dummy) 41irqreturn_t arch_timer_interrupt(int irq, void *dummy)
41{ 42{
42 /* last time the cmos clock got updated */
43 static long last_rtc_update=0;
44 43
45 if (current->pid) 44 if (current->pid)
46 profile_tick(CPU_PROFILING); 45 profile_tick(CPU_PROFILING);
@@ -49,21 +48,6 @@ irqreturn_t arch_timer_interrupt(int irq, void *dummy)
49 48
50 do_timer(1); 49 do_timer(1);
51 50
52 /*
53 * If we have an externally synchronized Linux clock, then update
54 * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
55 * called as close as possible to 500 ms before the new second starts.
56 */
57 if (ntp_synced() &&
58 xtime.tv_sec > last_rtc_update + 660 &&
59 (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 &&
60 (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) {
61 if (set_rtc_mmss(xtime.tv_sec) == 0)
62 last_rtc_update = xtime.tv_sec;
63 else
64 last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
65 }
66
67 write_sequnlock(&xtime_lock); 51 write_sequnlock(&xtime_lock);
68 52
69#ifndef CONFIG_SMP 53#ifndef CONFIG_SMP
@@ -71,8 +55,9 @@ irqreturn_t arch_timer_interrupt(int irq, void *dummy)
71#endif 55#endif
72 return(IRQ_HANDLED); 56 return(IRQ_HANDLED);
73} 57}
58#endif
74 59
75void time_init(void) 60static unsigned long read_rtc_mmss(void)
76{ 61{
77 unsigned int year, mon, day, hour, min, sec; 62 unsigned int year, mon, day, hour, min, sec;
78 63
@@ -83,10 +68,21 @@ void time_init(void)
83 68
84 if ((year += 1900) < 1970) 69 if ((year += 1900) < 1970)
85 year += 100; 70 year += 100;
86 xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
87 xtime.tv_nsec = 0;
88 wall_to_monotonic.tv_sec = -xtime.tv_sec;
89 71
90 hw_timer_init(); 72 return mktime(year, mon, day, hour, min, sec);;
73}
74
75unsigned long read_persistent_clock(void)
76{
77 return read_rtc_mmss();
91} 78}
92 79
80int update_persistent_clock(struct timespec now)
81{
82 return set_rtc_mmss(now.tv_sec);
83}
84
85void time_init(void)
86{
87 hw_timer_init();
88}