diff options
| author | Kevin Hilman <khilman@mvista.com> | 2007-11-12 23:24:03 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2008-04-14 09:57:12 -0700 |
| commit | f258b0c6fa6ca653c7f4e6e2846dbb7ed3af3446 (patch) | |
| tree | a5c89a4c4506ca87f99d4fd155633296302d0215 /arch/arm/plat-omap/common.c | |
| parent | 5a3a388fbefac3705dfcde16c93fc81e6fd9378f (diff) | |
ARM: OMAP: Timer32K: Move 32k-based sched_clock() to common code
Since 32k timer code is moving to OMAP1 specific dir, move the
32k-based sched_clock() into common code where it is based on the 32k
sync counter and can be used even when using MPU timer.
While moving, change the ticks-to-nsecs conversion to use the helper
functions provided by clocksource.h.
Also removed the unused ticks_to_usec, leaving only ticks_to_nsec.
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/common.c')
| -rw-r--r-- | arch/arm/plat-omap/common.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/common.c b/arch/arm/plat-omap/common.c index 4f0f9c4e938e..7f1cae16cfad 100644 --- a/arch/arm/plat-omap/common.c +++ b/arch/arm/plat-omap/common.c @@ -193,6 +193,23 @@ static struct clocksource clocksource_32k = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +/* + * Rounds down to nearest nsec. + */ +unsigned long long omap_32k_ticks_to_nsecs(unsigned long ticks_32k) +{ + return cyc2ns(&clocksource_32k, ticks_32k); +} + +/* + * Returns current time from boot in nsecs. It's OK for this to wrap + * around for now, as it's just a relative time stamp. + */ +unsigned long long sched_clock(void) +{ + return omap_32k_ticks_to_nsecs(omap_32k_read()); +} + static int __init omap_init_clocksource_32k(void) { static char err[] __initdata = KERN_ERR |