ARM: clockevents: fix IOP clock events initialization

Ensure that no interrupt is pending before registering the clock
event device, and properly initialize the periodic tick in the
->set_mode callback.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 3 deletions

diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c
index 85d3e55ca4a9..d615e6fbe502 100644
--- a/arch/arm/plat-iop/time.c
+++ b/arch/arm/plat-iop/time.c
@@ -87,6 +87,7 @@ static void iop_set_mode(enum clock_event_mode mode,
         case CLOCK_EVT_MODE_PERIODIC:
                 write_tmr0(tmr & ~IOP_TMR_EN);
                 write_tcr0(ticks_per_jiffy - 1);
+                write_trr0(ticks_per_jiffy - 1);
                 tmr |= (IOP_TMR_RELOAD | IOP_TMR_EN);
                 break;
         case CLOCK_EVT_MODE_ONESHOT:
@@ -152,6 +153,7 @@ void __init iop_init_time(unsigned long tick_rate)
          * Set up interrupting clockevent timer 0.
          */
         write_tmr0(timer_ctl & ~IOP_TMR_EN);
+        write_tisr(1);
         setup_irq(IRQ_IOP_TIMER0, &iop_timer_irq);
         clockevents_calc_mult_shift(&iop_clockevent,
                                     tick_rate, IOP_MIN_RANGE);
@@ -161,9 +163,6 @@ void __init iop_init_time(unsigned long tick_rate)
                 clockevent_delta2ns(0xf, &iop_clockevent);
         iop_clockevent.cpumask = cpumask_of(0);
         clockevents_register_device(&iop_clockevent);
-        write_trr0(ticks_per_jiffy - 1);
-        write_tcr0(ticks_per_jiffy - 1);
-        write_tmr0(timer_ctl);
 
         /*
          * Set up free-running clocksource timer 1.