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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-12-15 21:58:50 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-01-05 11:16:00 +0000
commit0af85dda39d9b673aca8c0ebae004ea70f3efc93 (patch)
treea3fad536f3c5cb4e91291efeb26eca93c2f37fd2 /arch/arm
parent1da0c89c66753860ccfe81eb327c25db46c2a24a (diff)
ARM: vexpress: add sched_clock() for Versatile Express
Add a sched_clock() implementation to Versatile Express using the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/mach-vexpress/v2m.c4
-rw-r--r--arch/arm/plat-versatile/Makefile5
3 files changed, 8 insertions, 2 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 34311f40d71..17b5ff0db1d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -268,6 +268,7 @@ config ARCH_VEXPRESS
select COMMON_CLKDEV
select GENERIC_CLOCKEVENTS
select HAVE_CLK
+ select HAVE_SCHED_CLOCK
select ICST
select PLAT_VERSATILE
help
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index 7eaa232180a..8c283100a9a 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -22,6 +22,8 @@
#include <mach/clkdev.h>
#include <mach/motherboard.h>
+#include <plat/sched_clock.h>
+
#include <plat/timer-sp.h>
#include "core.h"
@@ -50,6 +52,8 @@ void __init v2m_map_io(struct map_desc *tile, size_t num)
static void __init v2m_timer_init(void)
{
+ versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000);
+
writel(0, MMIO_P2V(V2M_TIMER0) + TIMER_CTRL);
writel(0, MMIO_P2V(V2M_TIMER1) + TIMER_CTRL);
diff --git a/arch/arm/plat-versatile/Makefile b/arch/arm/plat-versatile/Makefile
index 5cf88e8427b..8bb6ba6d357 100644
--- a/arch/arm/plat-versatile/Makefile
+++ b/arch/arm/plat-versatile/Makefile
@@ -1,7 +1,8 @@
obj-y := clock.o
obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
-obj-$(CONFIG_ARCH_REALVIEW) += sched-clock.o
-obj-$(CONFIG_ARCH_VERSATILE) += sched-clock.o
+ifneq ($(CONFIG_ARCH_INTEGRATOR),y)
+obj-y += sched-clock.o
+endif
ifeq ($(CONFIG_LEDS_CLASS),y)
obj-$(CONFIG_ARCH_REALVIEW) += leds.o
obj-$(CONFIG_ARCH_VERSATILE) += leds.o