diff options
Diffstat (limited to 'arch/blackfin/kernel/time.c')
| -rw-r--r-- | arch/blackfin/kernel/time.c | 56 |
1 files changed, 15 insertions, 41 deletions
diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c index 13c1ee3e640..3126b920a4a 100644 --- a/arch/blackfin/kernel/time.c +++ b/arch/blackfin/kernel/time.c @@ -25,7 +25,6 @@ static struct irqaction bfin_timer_irq = { .name = "Blackfin Timer Tick", - .flags = IRQF_DISABLED }; #if defined(CONFIG_IPIPE) @@ -51,7 +50,7 @@ void __init setup_core_timer(void) u32 tcount; /* power up the timer, but don't enable it just yet */ - bfin_write_TCNTL(1); + bfin_write_TCNTL(TMPWR); CSYNC(); /* the TSCALE prescaler counter */ @@ -64,7 +63,7 @@ void __init setup_core_timer(void) /* now enable the timer */ CSYNC(); - bfin_write_TCNTL(7); + bfin_write_TCNTL(TAUTORLD | TMREN | TMPWR); } #endif @@ -86,7 +85,7 @@ time_sched_init(irqreturn_t(*timer_routine) (int, void *)) /* * Should return useconds since last timer tick */ -u32 arch_gettimeoffset(void) +static u32 blackfin_gettimeoffset(void) { unsigned long offset; unsigned long clocks_per_jiffy; @@ -112,44 +111,16 @@ u32 arch_gettimeoffset(void) } #endif -static inline int set_rtc_mmss(unsigned long nowtime) -{ - return 0; -} - /* * timer_interrupt() needs to keep up the real-time clock, - * as well as call the "do_timer()" routine every clocktick + * as well as call the "xtime_update()" routine every clocktick */ #ifdef CONFIG_CORE_TIMER_IRQ_L1 __attribute__((l1_text)) #endif irqreturn_t timer_interrupt(int irq, void *dummy) { - /* last time the cmos clock got updated */ - static long last_rtc_update; - - write_seqlock(&xtime_lock); - do_timer(1); - - /* - * If we have an externally synchronized Linux clock, then update - * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be - * called as close as possible to 500 ms before the new second starts. - */ - if (ntp_synced() && - xtime.tv_sec > last_rtc_update + 660 && - (xtime.tv_nsec / NSEC_PER_USEC) >= - 500000 - ((unsigned)TICK_SIZE) / 2 - && (xtime.tv_nsec / NSEC_PER_USEC) <= - 500000 + ((unsigned)TICK_SIZE) / 2) { - if (set_rtc_mmss(xtime.tv_sec) == 0) - last_rtc_update = xtime.tv_sec; - else - /* Do it again in 60s. */ - last_rtc_update = xtime.tv_sec - 600; - } - write_sequnlock(&xtime_lock); + xtime_update(1); #ifdef CONFIG_IPIPE update_root_process_times(get_irq_regs()); @@ -161,9 +132,18 @@ irqreturn_t timer_interrupt(int irq, void *dummy) return IRQ_HANDLED; } -void __init time_init(void) +void read_persistent_clock(struct timespec *ts) { time_t secs_since_1970 = (365 * 37 + 9) * 24 * 60 * 60; /* 1 Jan 2007 */ + ts->tv_sec = secs_since_1970; + ts->tv_nsec = 0; +} + +void __init time_init(void) +{ +#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET + arch_gettimeoffset = blackfin_gettimeoffset; +#endif #ifdef CONFIG_RTC_DRV_BFIN /* [#2663] hack to filter junk RTC values that would cause @@ -176,11 +156,5 @@ void __init time_init(void) } #endif - /* Initialize xtime. From now on, xtime is updated with timer interrupts */ - xtime.tv_sec = secs_since_1970; - xtime.tv_nsec = 0; - - wall_to_monotonic.tv_sec = -xtime.tv_sec; - time_sched_init(timer_interrupt); } |