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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-01-05 19:09:03 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-01-05 19:09:03 +0100
commit58daf18cdcab550262a5f4681e1f1e073e21965a (patch)
tree2096324b947761a567dd451f33664f17ee1de2cd /arch/arm/mach-pxa
parentMerge branches 'mmci' and 'pl011-dma' into devel (diff)
parentARM: vexpress: add sched_clock() for Versatile Express (diff)
downloadlinux-58daf18cdcab550262a5f4681e1f1e073e21965a.tar.xz
linux-58daf18cdcab550262a5f4681e1f1e073e21965a.zip
Merge branch 'clksrc' into devel
Conflicts: arch/arm/mach-vexpress/v2m.c arch/arm/plat-omap/counter_32k.c arch/arm/plat-versatile/Makefile
Diffstat (limited to 'arch/arm/mach-pxa')
-rw-r--r--arch/arm/mach-pxa/time.c35
1 files changed, 10 insertions, 25 deletions
diff --git a/arch/arm/mach-pxa/time.c b/arch/arm/mach-pxa/time.c
index 293e40aeaf29..e7f64d9b4f2d 100644
--- a/arch/arm/mach-pxa/time.c
+++ b/arch/arm/mach-pxa/time.c
@@ -17,11 +17,11 @@
#include <linux/interrupt.h>
#include <linux/clockchips.h>
#include <linux/sched.h>
-#include <linux/cnt32_to_63.h>
#include <asm/div64.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
+#include <asm/sched_clock.h>
#include <mach/regs-ost.h>
/*
@@ -32,29 +32,18 @@
* long as there is always less than 582 seconds between successive
* calls to sched_clock() which should always be the case in practice.
*/
+static DEFINE_CLOCK_DATA(cd);
-#define OSCR2NS_SCALE_FACTOR 10
-
-static unsigned long oscr2ns_scale;
-
-static void __init set_oscr2ns_scale(unsigned long oscr_rate)
+unsigned long long notrace sched_clock(void)
{
- unsigned long long v = 1000000000ULL << OSCR2NS_SCALE_FACTOR;
- do_div(v, oscr_rate);
- oscr2ns_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 (oscr2ns_scale & 1)
- oscr2ns_scale++;
+ u32 cyc = OSCR;
+ return cyc_to_sched_clock(&cd, cyc, (u32)~0);
}
-unsigned long long sched_clock(void)
+static void notrace pxa_update_sched_clock(void)
{
- unsigned long long v = cnt32_to_63(OSCR);
- return (v * oscr2ns_scale) >> OSCR2NS_SCALE_FACTOR;
+ u32 cyc = OSCR;
+ update_sched_clock(&cd, cyc, (u32)~0);
}
@@ -127,7 +116,6 @@ static struct clocksource cksrc_pxa_oscr0 = {
.rating = 200,
.read = pxa_read_oscr,
.mask = CLOCKSOURCE_MASK(32),
- .shift = 20,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@@ -145,7 +133,7 @@ static void __init pxa_timer_init(void)
OIER = 0;
OSSR = OSSR_M0 | OSSR_M1 | OSSR_M2 | OSSR_M3;
- set_oscr2ns_scale(clock_tick_rate);
+ init_sched_clock(&cd, pxa_update_sched_clock, 32, clock_tick_rate);
ckevt_pxa_osmr0.mult =
div_sc(clock_tick_rate, NSEC_PER_SEC, ckevt_pxa_osmr0.shift);
@@ -155,12 +143,9 @@ static void __init pxa_timer_init(void)
clockevent_delta2ns(MIN_OSCR_DELTA * 2, &ckevt_pxa_osmr0) + 1;
ckevt_pxa_osmr0.cpumask = cpumask_of(0);
- cksrc_pxa_oscr0.mult =
- clocksource_hz2mult(clock_tick_rate, cksrc_pxa_oscr0.shift);
-
setup_irq(IRQ_OST0, &pxa_ost0_irq);
- clocksource_register(&cksrc_pxa_oscr0);
+ clocksource_register_hz(&cksrc_pxa_oscr0, clock_tick_rate);
clockevents_register_device(&ckevt_pxa_osmr0);
}