diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-21 15:40:55 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-21 15:40:55 -0700 |
commit | 85b375a613085b78531ec86369a51c2f3b922f95 (patch) | |
tree | 716437d598de92bbd7acaf24622e9a7d74fc209a /arch/arm/mach-omap1/time.c | |
parent | ec965350bb98bd291eb34f6ecddfdcfc36da1e6e (diff) | |
parent | cf816ecb533ab96b883dfdc0db174598b5b5c4d2 (diff) |
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (212 commits)
[ARM] pxa: Phycore pcm-990-specific code for the PXA270 Quick Capture driver
[ARM] pxa: V4L2 soc_camera driver for PXA270
[ARM] pxa: restrict availability of pxa2xx PCMCIA drivers
[ARM] 5005/1: BAST: Fix kset_name initialiser
[ARM] 4967/1: Adds functions to set clkout rate for Samsung S3C2410
[ARM] 4988/1: Add GPIO lib support to the EP93xx
[ARM] Add initial sparsemem support
[ARM] pxa: initialise PXA devices before platform init code
[ARM] 5002/1: tosa: add two more leds
[ARM] 5004/1: Tosa: make several unreferenced structures static.
[ARM] 5003/1: Shut up sparse warnings
[ARM] 4977/2: soc - pxa2xx-ac97 - Add missing clk_enable()
[ARM] 4976/1: zylonite: Configure GPIO for WM9713 IRQ line
[ARM] 4974/1: Drop unused leds-tosa.
[ARM] 4973/1: Tosa: use leds-gpio driver.
[ARM] 4972/1: Tosa: convert scoop GPIOs usage to generic gpio code
[ARM] 4971/1: pxaficp_ir: provide startup and shutdown hooks
[ARM] pxa: lubbock: move mis-placed SPI info
[ARM] 4970/1: tosa: correct gpio used for wake up.
[ARM] 4966/1: magician: add MFP pin configuration
...
Diffstat (limited to 'arch/arm/mach-omap1/time.c')
-rw-r--r-- | arch/arm/mach-omap1/time.c | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/arch/arm/mach-omap1/time.c b/arch/arm/mach-omap1/time.c index a4f8b2055437..5d2b270935a2 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); @@ -260,22 +227,6 @@ static void __init omap_init_clocksource(unsigned long rate) printk(err, clocksource_mpu.name); } - -/* - * Scheduler clock - returns current time in nanosec units. - */ -unsigned long long sched_clock(void) -{ - unsigned long ticks = 0 - omap_mpu_timer_read(1); - unsigned long long ticks64; - - ticks64 = omap_mpu_timer2_overflows; - ticks64 <<= 32; - ticks64 |= ticks; - - return cycles_2_ns(ticks64); -} - /* * --------------------------------------------------------------------------- * Timer initialization |