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>

1 files changed, 4 insertions, 0 deletions

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);