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ARM: OMAP: Timer32K: Move 32k-based sched_clock() to common code

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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>
This commit is contained in:
Kevin Hilman
2007-11-12 23:24:03 -08:00
committed by Tony Lindgren
parent 5a3a388fbe
commit f258b0c6fa
2 changed files with 17 additions and 26 deletions
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17
arch/arm/plat-omap/common.c
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@@ -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