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>
mariux64 · Jan 5, 2011 · 0af85dd · 0af85dd
1 parent 1da0c89
commit 0af85dd
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Showing 3 changed files with 8 additions and 2 deletions.
diff --git 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
@@ -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
@@ -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