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Diffstat (limited to 'arch/arm/mach-exynos/mct.c')
-rw-r--r--arch/arm/mach-exynos/mct.c62
1 files changed, 36 insertions, 26 deletions
diff --git a/arch/arm/mach-exynos/mct.c b/arch/arm/mach-exynos/mct.c
index 85b5527..897d9a9 100644
--- a/arch/arm/mach-exynos/mct.c
+++ b/arch/arm/mach-exynos/mct.c
@@ -21,6 +21,7 @@
#include <linux/percpu.h>
#include <asm/hardware/gic.h>
+#include <asm/localtimer.h>
#include <plat/cpu.h>
@@ -29,12 +30,13 @@
#include <mach/regs-mct.h>
#include <asm/mach/time.h>
+#define TICK_BASE_CNT 1
+
enum {
MCT_INT_SPI,
MCT_INT_PPI
};
-static unsigned long clk_cnt_per_tick;
static unsigned long clk_rate;
static unsigned int mct_int_type;
@@ -205,11 +207,14 @@ static int exynos4_comp_set_next_event(unsigned long cycles,
static void exynos4_comp_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
+ unsigned long cycles_per_jiffy;
exynos4_mct_comp0_stop();
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
- exynos4_mct_comp0_start(mode, clk_cnt_per_tick);
+ cycles_per_jiffy =
+ (((unsigned long long) NSEC_PER_SEC / HZ * evt->mult) >> evt->shift);
+ exynos4_mct_comp0_start(mode, cycles_per_jiffy);
break;
case CLOCK_EVT_MODE_ONESHOT:
@@ -248,9 +253,7 @@ static struct irqaction mct_comp_event_irq = {
static void exynos4_clockevent_init(void)
{
- clk_cnt_per_tick = clk_rate / 2 / HZ;
-
- clockevents_calc_mult_shift(&mct_comp_device, clk_rate / 2, 5);
+ clockevents_calc_mult_shift(&mct_comp_device, clk_rate, 5);
mct_comp_device.max_delta_ns =
clockevent_delta2ns(0xffffffff, &mct_comp_device);
mct_comp_device.min_delta_ns =
@@ -258,7 +261,10 @@ static void exynos4_clockevent_init(void)
mct_comp_device.cpumask = cpumask_of(0);
clockevents_register_device(&mct_comp_device);
- setup_irq(IRQ_MCT_G0, &mct_comp_event_irq);
+ if (soc_is_exynos5250())
+ setup_irq(EXYNOS5_IRQ_MCT_G0, &mct_comp_event_irq);
+ else
+ setup_irq(EXYNOS4_IRQ_MCT_G0, &mct_comp_event_irq);
}
#ifdef CONFIG_LOCAL_TIMERS
@@ -314,12 +320,15 @@ static inline void exynos4_tick_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
struct mct_clock_event_device *mevt = this_cpu_ptr(&percpu_mct_tick);
+ unsigned long cycles_per_jiffy;
exynos4_mct_tick_stop(mevt);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
- exynos4_mct_tick_start(clk_cnt_per_tick, mevt);
+ cycles_per_jiffy =
+ (((unsigned long long) NSEC_PER_SEC / HZ * evt->mult) >> evt->shift);
+ exynos4_mct_tick_start(cycles_per_jiffy, mevt);
break;
case CLOCK_EVT_MODE_ONESHOT:
@@ -375,7 +384,7 @@ static struct irqaction mct_tick1_event_irq = {
.handler = exynos4_mct_tick_isr,
};
-static void exynos4_mct_tick_init(struct clock_event_device *evt)
+static int __cpuinit exynos4_local_timer_setup(struct clock_event_device *evt)
{
struct mct_clock_event_device *mevt;
unsigned int cpu = smp_processor_id();
@@ -393,7 +402,7 @@ static void exynos4_mct_tick_init(struct clock_event_device *evt)
evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
evt->rating = 450;
- clockevents_calc_mult_shift(evt, clk_rate / 2, 5);
+ clockevents_calc_mult_shift(evt, clk_rate / (TICK_BASE_CNT + 1), 5);
evt->max_delta_ns =
clockevent_delta2ns(0x7fffffff, evt);
evt->min_delta_ns =
@@ -401,33 +410,27 @@ static void exynos4_mct_tick_init(struct clock_event_device *evt)
clockevents_register_device(evt);
- exynos4_mct_write(0x1, mevt->base + MCT_L_TCNTB_OFFSET);
+ exynos4_mct_write(TICK_BASE_CNT, mevt->base + MCT_L_TCNTB_OFFSET);
if (mct_int_type == MCT_INT_SPI) {
if (cpu == 0) {
mct_tick0_event_irq.dev_id = mevt;
- evt->irq = IRQ_MCT_L0;
- setup_irq(IRQ_MCT_L0, &mct_tick0_event_irq);
+ evt->irq = EXYNOS4_IRQ_MCT_L0;
+ setup_irq(EXYNOS4_IRQ_MCT_L0, &mct_tick0_event_irq);
} else {
mct_tick1_event_irq.dev_id = mevt;
- evt->irq = IRQ_MCT_L1;
- setup_irq(IRQ_MCT_L1, &mct_tick1_event_irq);
- irq_set_affinity(IRQ_MCT_L1, cpumask_of(1));
+ evt->irq = EXYNOS4_IRQ_MCT_L1;
+ setup_irq(EXYNOS4_IRQ_MCT_L1, &mct_tick1_event_irq);
+ irq_set_affinity(EXYNOS4_IRQ_MCT_L1, cpumask_of(1));
}
} else {
- enable_percpu_irq(IRQ_MCT_LOCALTIMER, 0);
+ enable_percpu_irq(EXYNOS_IRQ_MCT_LOCALTIMER, 0);
}
-}
-
-/* Setup the local clock events for a CPU */
-int __cpuinit local_timer_setup(struct clock_event_device *evt)
-{
- exynos4_mct_tick_init(evt);
return 0;
}
-void local_timer_stop(struct clock_event_device *evt)
+static void exynos4_local_timer_stop(struct clock_event_device *evt)
{
unsigned int cpu = smp_processor_id();
evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt);
@@ -437,8 +440,13 @@ void local_timer_stop(struct clock_event_device *evt)
else
remove_irq(evt->irq, &mct_tick1_event_irq);
else
- disable_percpu_irq(IRQ_MCT_LOCALTIMER);
+ disable_percpu_irq(EXYNOS_IRQ_MCT_LOCALTIMER);
}
+
+static struct local_timer_ops exynos4_mct_tick_ops __cpuinitdata = {
+ .setup = exynos4_local_timer_setup,
+ .stop = exynos4_local_timer_stop,
+};
#endif /* CONFIG_LOCAL_TIMERS */
static void __init exynos4_timer_resources(void)
@@ -452,12 +460,14 @@ static void __init exynos4_timer_resources(void)
if (mct_int_type == MCT_INT_PPI) {
int err;
- err = request_percpu_irq(IRQ_MCT_LOCALTIMER,
+ err = request_percpu_irq(EXYNOS_IRQ_MCT_LOCALTIMER,
exynos4_mct_tick_isr, "MCT",
&percpu_mct_tick);
WARN(err, "MCT: can't request IRQ %d (%d)\n",
- IRQ_MCT_LOCALTIMER, err);
+ EXYNOS_IRQ_MCT_LOCALTIMER, err);
}
+
+ local_timer_register(&exynos4_mct_tick_ops);
#endif /* CONFIG_LOCAL_TIMERS */
}