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authorKevin Hilman <khilman@mvista.com>2007-12-12 18:25:56 -0800
committerTony Lindgren <tony@atomide.com>2008-04-14 09:57:13 -0700
commitcaa97963a5d9042af15728bcd22ee5a8900dc0e9 (patch)
tree785315c0b087b15525488f999089d5d234ae884f
parent5c8388e5dfa7bddfca68f16b0ef61933508b716b (diff)
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>
-rw-r--r--arch/arm/mach-omap1/time.c33
1 files changed, 0 insertions, 33 deletions
diff --git a/arch/arm/mach-omap1/time.c b/arch/arm/mach-omap1/time.c
index a4f8b205543..f6cf2b7e52b 100644
--- a/arch/arm/mach-omap1/time.c
+++ b/arch/arm/mach-omap1/time.c
@@ -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);