From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 20 May 2010 00:10:06 +0000 (-0700)
Subject: Merge branch 'timers-for-linus-cleanups' of git://git.kernel.org/pub/scm/linux/kernel... 
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7d02093e29de9efc4a72d5e93baae9506969b789;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Merge branch 'timers-for-linus-cleanups' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'timers-for-linus-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  avr32: Fix typo in read_persistent_clock()
  sparc: Convert sparc to use read/update_persistent_clock
  cris: Convert cris to use read/update_persistent_clock
  m68k: Convert m68k to use read/update_persistent_clock
  m32r: Convert m32r to use read/update_peristent_clock
  blackfin: Convert blackfin to use read/update_persistent_clock
  ia64: Convert ia64 to use read/update_persistent_clock
  avr32: Convert avr32 to use read/update_persistent_clock
  h8300: Convert h8300 to use read/update_persistent_clock
  frv: Convert frv to use read/update_persistent_clock
  mn10300: Convert mn10300 to use read/update_persistent_clock
  alpha: Convert alpha to use read/update_persistent_clock
  xtensa: Fix unnecessary setting of xtime
  time: Clean up direct xtime usage in xen
---

7d02093e29de9efc4a72d5e93baae9506969b789
diff --cc arch/blackfin/kernel/time-ts.c
index cb7a01d4f009,08dd3e83c187..8c9a43daf80f
--- a/arch/blackfin/kernel/time-ts.c
+++ b/arch/blackfin/kernel/time-ts.c
@@@ -304,58 -305,58 +304,64 @@@ void bfin_coretmr_init(void
  	CSYNC();
  }
  
 -static unsigned long  __init bfin_clockevent_check(void)
 -{
 -	setup_irq(IRQ_CORETMR, &bfin_timer_irq);
 -	return get_cclk() / TIME_SCALE;
 -}
 -
 -void __init setup_core_timer(void)
 +#ifdef CONFIG_CORE_TIMER_IRQ_L1
 +__attribute__((l1_text))
 +#endif
 +irqreturn_t bfin_coretmr_interrupt(int irq, void *dev_id)
  {
 -	bfin_timer_init();
 -	bfin_timer_set_mode(CLOCK_EVT_MODE_PERIODIC, NULL);
 -}
 -#endif /* CONFIG_TICKSOURCE_GPTMR0 */
 +	int cpu = smp_processor_id();
 +	struct clock_event_device *evt = &per_cpu(coretmr_events, cpu);
  
 -/*
 - * timer_interrupt() needs to keep up the real-time clock,
 - * as well as call the "do_timer()" routine every clocktick
 - */
 -irqreturn_t timer_interrupt(int irq, void *dev_id)
 -{
 -	struct clock_event_device *evt = dev_id;
  	smp_mb();
  	evt->event_handler(evt);
 -	bfin_timer_ack();
 -	return IRQ_HANDLED;
 -}
 -
 -static int __init bfin_clockevent_init(void)
 -{
 -	unsigned long timer_clk;
  
 -	timer_clk = bfin_clockevent_check();
 +	touch_nmi_watchdog();
  
 -	bfin_timer_init();
 +	return IRQ_HANDLED;
 +}
  
 -	clockevent_bfin.mult = div_sc(timer_clk, NSEC_PER_SEC, clockevent_bfin.shift);
 -	clockevent_bfin.max_delta_ns = clockevent_delta2ns(-1, &clockevent_bfin);
 -	clockevent_bfin.min_delta_ns = clockevent_delta2ns(100, &clockevent_bfin);
 -	clockevent_bfin.cpumask = cpumask_of(0);
 -	clockevents_register_device(&clockevent_bfin);
 +static struct irqaction coretmr_irq = {
 +	.name		= "Blackfin CoreTimer",
 +	.flags		= IRQF_DISABLED | IRQF_TIMER | \
 +			  IRQF_IRQPOLL | IRQF_PERCPU,
 +	.handler	= bfin_coretmr_interrupt,
 +};
  
 -	return 0;
 +void bfin_coretmr_clockevent_init(void)
 +{
 +	unsigned long clock_tick;
 +	unsigned int cpu = smp_processor_id();
 +	struct clock_event_device *evt = &per_cpu(coretmr_events, cpu);
 +
 +	evt->name = "bfin_core_timer";
 +	evt->rating = 350;
 +	evt->irq = -1;
 +	evt->shift = 32;
 +	evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
 +	evt->set_next_event = bfin_coretmr_set_next_event;
 +	evt->set_mode = bfin_coretmr_set_mode;
 +
 +	clock_tick = get_cclk() / TIME_SCALE;
 +	evt->mult = div_sc(clock_tick, NSEC_PER_SEC, evt->shift);
 +	evt->max_delta_ns = clockevent_delta2ns(-1, evt);
 +	evt->min_delta_ns = clockevent_delta2ns(100, evt);
 +
 +	evt->cpumask = cpumask_of(cpu);
 +
 +	clockevents_register_device(evt);
  }
 +#endif /* CONFIG_TICKSOURCE_CORETMR */
 +
  
- 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_RTC_DRV_BFIN
  	/* [#2663] hack to filter junk RTC values that would cause
@@@ -368,28 -369,7 +374,23 @@@
  	}
  #endif
  
- 	/* Initialize xtime. From now on, xtime is updated with timer interrupts */
- 	xtime.tv_sec = secs_since_1970;
- 	xtime.tv_nsec = 0;
- 	set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec);
- 
  	bfin_cs_cycles_init();
  	bfin_cs_gptimer0_init();
 -	bfin_clockevent_init();
 +
 +#if defined(CONFIG_TICKSOURCE_CORETMR)
 +	bfin_coretmr_init();
 +	setup_irq(IRQ_CORETMR, &coretmr_irq);
 +	bfin_coretmr_clockevent_init();
 +#endif
 +
 +#if defined(CONFIG_TICKSOURCE_GPTMR0)
 +	bfin_gptmr0_init();
 +	setup_irq(IRQ_TIMER0, &gptmr0_irq);
 +	gptmr0_irq.dev_id = &clockevent_gptmr0;
 +	bfin_gptmr0_clockevent_init(&clockevent_gptmr0);
 +#endif
 +
 +#if !defined(CONFIG_TICKSOURCE_CORETMR) && !defined(CONFIG_TICKSOURCE_GPTMR0)
 +# error at least one clock event device is required
 +#endif
  }