diff options
Diffstat (limited to 'arch/arm/plat-iop/time.c')
| -rw-r--r-- | arch/arm/plat-iop/time.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c index 558cdfaf76b6..07f23bb42bed 100644 --- a/arch/arm/plat-iop/time.c +++ b/arch/arm/plat-iop/time.c @@ -17,6 +17,7 @@ #include <linux/interrupt.h> #include <linux/time.h> #include <linux/init.h> +#include <linux/sched.h> #include <linux/timex.h> #include <linux/sched.h> #include <linux/io.h> @@ -24,6 +25,7 @@ #include <linux/clockchips.h> #include <mach/hardware.h> #include <asm/irq.h> +#include <asm/sched_clock.h> #include <asm/uaccess.h> #include <asm/mach/irq.h> #include <asm/mach/time.h> @@ -50,15 +52,21 @@ static struct clocksource iop_clocksource = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +static DEFINE_CLOCK_DATA(cd); + /* * IOP sched_clock() implementation via its clocksource. */ -unsigned long long sched_clock(void) +unsigned long long notrace sched_clock(void) { - cycle_t cyc = iop_clocksource_read(NULL); - struct clocksource *cs = &iop_clocksource; + u32 cyc = 0xffffffffu - read_tcr1(); + return cyc_to_sched_clock(&cd, cyc, (u32)~0); +} - return clocksource_cyc2ns(cyc, cs->mult, cs->shift); +static void notrace iop_update_sched_clock(void) +{ + u32 cyc = 0xffffffffu - read_tcr1(); + update_sched_clock(&cd, cyc, (u32)~0); } /* @@ -88,6 +96,7 @@ 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: @@ -143,6 +152,8 @@ void __init iop_init_time(unsigned long tick_rate) { u32 timer_ctl; + init_sched_clock(&cd, iop_update_sched_clock, 32, tick_rate); + ticks_per_jiffy = DIV_ROUND_CLOSEST(tick_rate, HZ); iop_tick_rate = tick_rate; @@ -153,6 +164,7 @@ 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); @@ -162,9 +174,6 @@ 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. @@ -172,7 +181,5 @@ void __init iop_init_time(unsigned long tick_rate) write_trr1(0xffffffff); write_tcr1(0xffffffff); write_tmr1(timer_ctl); - clocksource_calc_mult_shift(&iop_clocksource, tick_rate, - IOP_MIN_RANGE); - clocksource_register(&iop_clocksource); + clocksource_register_hz(&iop_clocksource, tick_rate); } |