Commit caa97963 authored by Kevin Hilman's avatar Kevin Hilman Committed by Tony Lindgren
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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: default avatarKevin Hilman <khilman@mvista.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 5c8388e5

arch/arm/mach-omap1/time.c

+0 −33
Original line number Diff line number Diff line
@@ -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);