ARM: 7310/1: integrator: implement sched_clock across all boards

Now that we can select a sched_clock at runtime, let's implement
it for the Integrator AP, default-select the one found in all
other board it for all plat-versatile boards and make the right
clock kick in at runtime.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/mach-integrator/Kconfig b/arch/arm/mach-integrator/Kconfig
index 350e26636a06..5a6148ab6dac 100644
--- a/arch/arm/mach-integrator/Kconfig
+++ b/arch/arm/mach-integrator/Kconfig
@@ -5,6 +5,7 @@ menu "Integrator Options"
 config ARCH_INTEGRATOR_AP
         bool "Support Integrator/AP and Integrator/PP2 platforms"
         select CLKSRC_MMIO
+        select HAVE_SCHED_CLOCK
         select MIGHT_HAVE_PCI
         select SERIAL_AMBA_PL010
         select SERIAL_AMBA_PL010_CONSOLE
diff --git a/arch/arm/mach-integrator/integrator_ap.c b/arch/arm/mach-integrator/integrator_ap.c
index 21a1d6cbef40..4dde28b9dc07 100644
--- a/arch/arm/mach-integrator/integrator_ap.c
+++ b/arch/arm/mach-integrator/integrator_ap.c
@@ -42,6 +42,7 @@
 #include <asm/setup.h>
 #include <asm/param.h>          /* HZ */
 #include <asm/mach-types.h>
+#include <asm/sched_clock.h>
 
 #include <mach/lm.h>
 
@@ -325,6 +326,11 @@ static void __init ap_init(void)
 
 static unsigned long timer_reload;
 
+static u32 notrace integrator_read_sched_clock(void)
+{
+        return -readl((void __iomem *) TIMER2_VA_BASE + TIMER_VALUE);
+}
+
 static void integrator_clocksource_init(unsigned long inrate)
 {
         void __iomem *base = (void __iomem *)TIMER2_VA_BASE;
@@ -341,6 +347,7 @@ static void integrator_clocksource_init(unsigned long inrate)
 
         clocksource_mmio_init(base + TIMER_VALUE, "timer2",
                         rate, 200, 16, clocksource_mmio_readl_down);
+        setup_sched_clock(integrator_read_sched_clock, 16, rate);
 }
 
 static void __iomem * const clkevt_base = (void __iomem *)TIMER1_VA_BASE;