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ARM: 5869/1: ixp4xx: implement sched_clock()

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Add a better sched_clock() to the ixp4xx platform,
implemented via its clocksource support.

This is based on the sched_clock() I implemented for
the IOP platform. Tested on a ds101 ixp420 machine.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Mikael Pettersson
2010-01-09 13:03:59 +01:00
committed by Russell King
parent 74d2e4f8d7
commit e00d9d4b17
1 changed files with 11 additions and 0 deletions
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11
arch/arm/mach-ixp4xx/common.c
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@@ -426,6 +426,17 @@ static void __init ixp4xx_clocksource_init(void)
clocksource_register(&clocksource_ixp4xx); clocksource_register(&clocksource_ixp4xx);
} }
/*
* sched_clock()
*/
unsigned long long sched_clock(void)
{
cycle_t cyc = ixp4xx_get_cycles(NULL);
struct clocksource *cs = &clocksource_ixp4xx;
return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
}
/* /*
* clockevents * clockevents
*/ */