#include <linux/io.h>
#include <linux/irq.h>
#include <linux/sched.h>
-#include <linux/cnt32_to_63.h>
+#include <asm/sched_clock.h>
#include <mach/addr-map.h>
#include <mach/regs-timers.h>
#include <mach/regs-apbc.h>
#define MAX_DELTA (0xfffffffe)
#define MIN_DELTA (16)
-#define TCR2NS_SCALE_FACTOR 10
-
-static unsigned long tcr2ns_scale;
-
-static void __init set_tcr2ns_scale(unsigned long tcr_rate)
-{
- unsigned long long v = 1000000000ULL << TCR2NS_SCALE_FACTOR;
- do_div(v, tcr_rate);
- tcr2ns_scale = v;
- /*
- * We want an even value to automatically clear the top bit
- * returned by cnt32_to_63() without an additional run time
- * instruction. So if the LSB is 1 then round it up.
- */
- if (tcr2ns_scale & 1)
- tcr2ns_scale++;
-}
+static DEFINE_CLOCK_DATA(cd);
/*
* FIXME: the timer needs some delay to stablize the counter capture
return __raw_readl(TIMERS_VIRT_BASE + TMR_CVWR(0));
}
-unsigned long long sched_clock(void)
+unsigned long long notrace sched_clock(void)
{
- unsigned long long v = cnt32_to_63(timer_read());
- return (v * tcr2ns_scale) >> TCR2NS_SCALE_FACTOR;
+ u32 cyc = timer_read();
+ return cyc_to_sched_clock(&cd, cyc, (u32)~0);
+}
+
+static void notrace mmp_update_sched_clock(void)
+{
+ u32 cyc = timer_read();
+ update_sched_clock(&cd, cyc, (u32)~0);
}
static irqreturn_t timer_interrupt(int irq, void *dev_id)
static struct clocksource cksrc = {
.name = "clocksource",
- .shift = 20,
.rating = 200,
.read = clksrc_read,
.mask = CLOCKSOURCE_MASK(32),
{
timer_config();
- set_tcr2ns_scale(CLOCK_TICK_RATE);
+ init_sched_clock(&cd, mmp_update_sched_clock, 32, CLOCK_TICK_RATE);
ckevt.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, ckevt.shift);
ckevt.max_delta_ns = clockevent_delta2ns(MAX_DELTA, &ckevt);
ckevt.min_delta_ns = clockevent_delta2ns(MIN_DELTA, &ckevt);
ckevt.cpumask = cpumask_of(0);
- cksrc.mult = clocksource_hz2mult(CLOCK_TICK_RATE, cksrc.shift);
-
setup_irq(irq, &timer_irq);
- clocksource_register(&cksrc);
+ clocksource_register_hz(&cksrc, CLOCK_TICK_RATE);
clockevents_register_device(&ckevt);
}
-
-static void __init mmp2_timer_init(void)
-{
- unsigned long clk_rst;
-
- __raw_writel(APBC_APBCLK | APBC_RST, APBC_MMP2_TIMERS);
-
- /*
- * enable bus/functional clock, enable 6.5MHz (divider 4),
- * release reset
- */
- clk_rst = APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(1);
- __raw_writel(clk_rst, APBC_MMP2_TIMERS);
-
- timer_init(IRQ_MMP2_TIMER1);
-}
-
-struct sys_timer mmp2_timer = {
- .init = mmp2_timer_init,
-};
-