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

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-01-15 18:19:56 +00:00
parent fe8e1a57f0
commit 4ce1755275
1 changed files with 5 additions and 7 deletions
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12
arch/arm/plat-versatile/timer-sp.c
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@ -26,15 +26,13 @@
#include <asm/hardware/arm_timer.h> #include <asm/hardware/arm_timer.h>
#include <mach/platform.h>
#include <plat/timer-sp.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; 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, writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
clksrc_base + TIMER_CTRL); clksrc_base + TIMER_CTRL);
cs->mult = clocksource_khz2mult(1000, cs->shift); cs->mult = clocksource_khz2mult(TIMER_FREQ_KHZ, cs->shift);
clocksource_register(cs); clocksource_register(cs);
} }
@ -149,7 +147,7 @@ void __init sp804_clockevents_init(void __iomem *base, unsigned int timer_irq)
clkevt_base = base; clkevt_base = base;
evt->irq = timer_irq; 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->max_delta_ns = clockevent_delta2ns(0xffffffff, evt);
evt->min_delta_ns = clockevent_delta2ns(0xf, evt); evt->min_delta_ns = clockevent_delta2ns(0xf, evt);