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ARM: OMAP: TimerMPU: Remove unused cycles-to-nsec conversions 

These are no longer used and similar conversions are provided
by the clocksource/clockevent code.

Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Kevin Hilman 2007-12-12 18:25:56 -08:00 committed by Tony Lindgren
parent 5c8388e5df
commit caa97963a5
1 changed files with 0 additions and 33 deletions
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33
arch/arm/mach-omap1/time.c
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@ -56,37 +56,6 @@
#define OMAP_MPU_TIMER_BASE OMAP_MPU_TIMER1_BASE
#define OMAP_MPU_TIMER_OFFSET 0x100
/* cycles to nsec conversions taken from arch/i386/kernel/timers/timer_tsc.c,
* converted to use kHz by Kevin Hilman */
/* convert from cycles(64bits) => nanoseconds (64bits)
* basic equation:
* ns = cycles / (freq / ns_per_sec)
* ns = cycles * (ns_per_sec / freq)
* ns = cycles * (10^9 / (cpu_khz * 10^3))
* ns = cycles * (10^6 / cpu_khz)
*
* Then we use scaling math (suggested by george at mvista.com) to get:
* ns = cycles * (10^6 * SC / cpu_khz / SC
* ns = cycles * cyc2ns_scale / SC
*
* And since SC is a constant power of two, we can convert the div
* into a shift.
* -johnstul at us.ibm.com "math is hard, lets go shopping!"
*/
static unsigned long cyc2ns_scale;
#define CYC2NS_SCALE_FACTOR 10 /* 2^10, carefully chosen */
static inline void set_cyc2ns_scale(unsigned long cpu_khz)
{
cyc2ns_scale = (1000000 << CYC2NS_SCALE_FACTOR)/cpu_khz;
}
static inline unsigned long long cycles_2_ns(unsigned long long cyc)
{
return (cyc * cyc2ns_scale) >> CYC2NS_SCALE_FACTOR;
}
typedef struct {
u32 cntl; /* CNTL_TIMER, R/W */
u32 load_tim; /* LOAD_TIM, W */
@ -194,8 +163,6 @@ static struct irqaction omap_mpu_timer1_irq = {
static __init void omap_init_mpu_timer(unsigned long rate)
{
set_cyc2ns_scale(rate / 1000);
setup_irq(INT_TIMER1, &omap_mpu_timer1_irq);
omap_mpu_timer_start(0, (rate / HZ) - 1, 1);