ARM: Realview/Versatile: don't use magic numbers for timer frequency

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/plat-versatile/timer-sp.c b/arch/arm/plat-versatile/timer-sp.c
index d1dbef5..fb0d1c2 100644 (file)
--- a/arch/arm/plat-versatile/timer-sp.c
+++ b/arch/arm/plat-versatile/timer-sp.c
@@ -26,15 +26,13 @@
 
 #include <asm/hardware/arm_timer.h>
 
-#include <mach/platform.h>
-
 #include <plat/timer-sp.h>
 
 /*
- * How long is the timer interval?
+ * These timers are currently always setup to be clocked at 1MHz.
  */
-#define TIMER_RELOAD   (TICKS_PER_uSEC * mSEC_10)
-
+#define TIMER_FREQ_KHZ (1000)
+#define TIMER_RELOAD   (TIMER_FREQ_KHZ * 1000 / HZ)
 
 static void __iomem *clksrc_base;
 
@@ -65,7 +63,7 @@ void __init sp804_clocksource_init(void __iomem *base)
        writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
                clksrc_base + TIMER_CTRL);
 
-       cs->mult = clocksource_khz2mult(1000, cs->shift);
+       cs->mult = clocksource_khz2mult(TIMER_FREQ_KHZ, cs->shift);
        clocksource_register(cs);
 }
 
@@ -149,7 +147,7 @@ void __init sp804_clockevents_init(void __iomem *base, unsigned int timer_irq)
        clkevt_base = base;
 
        evt->irq = timer_irq;
-       evt->mult = div_sc(1000000, NSEC_PER_SEC, evt->shift);
+       evt->mult = div_sc(TIMER_FREQ_KHZ, NSEC_PER_MSEC, evt->shift);
        evt->max_delta_ns = clockevent_delta2ns(0xffffffff, evt);
        evt->min_delta_ns = clockevent_delta2ns(0xf, evt);