---

yaml --- r: 225837 b: refs/heads/master c: 7ce8301 h: refs/heads/master i: 225835: d8d339c v: v3
git-mirror · Dec 22, 2010 · 3192c4d · 3192c4d
1 parent 0cdf34b
commit 3192c4d
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Showing 3 changed files with 11 additions and 21 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 28bb7bc61a8cd48716d38d9c153fdc524f09870a
+refs/heads/master: 7ce830188199c23aaeaf0c5ccc28b73c32b6df02
diff --git a/trunk/arch/arm/Kconfig b/trunk/arch/arm/Kconfig
@@ -593,6 +593,7 @@ config ARCH_PXA
 	select COMMON_CLKDEV
 	select ARCH_REQUIRE_GPIOLIB
 	select GENERIC_CLOCKEVENTS
+	select HAVE_SCHED_CLOCK
 	select TICK_ONESHOT
 	select PLAT_PXA
 	select SPARSE_IRQ

diff --git a/trunk/arch/arm/mach-pxa/time.c b/trunk/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 notrace 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);
 }
 
 
@@ -144,7 +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);