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authorMikael Pettersson <mikpe@it.uu.se>2009-10-29 11:46:56 -0700
committerDan Williams <dan.j.williams@intel.com>2009-10-29 11:46:56 -0700
commit345a32296b1f9f6121379e0240915e0e2be2dbf5 (patch)
tree995ad5887af10b11b2cbc48e8936f7f7d9fbb109 /arch/arm/plat-iop/time.c
parent980f2296b5a8dfe589f023fd34229dcfdcf280fa (diff)
iop: implement sched_clock()
This adds a better sched_clock() to the IOP platform, implemented using its new clocksource support. Tested on n2100, compile-tested for all plat-iop machines. [dan.j.williams@intel.com: allow early cp6 access] Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'arch/arm/plat-iop/time.c')
-rw-r--r--arch/arm/plat-iop/time.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c
index aaaef3b4bc6..6c8a02ad98e 100644
--- a/arch/arm/plat-iop/time.c
+++ b/arch/arm/plat-iop/time.c
@@ -66,6 +66,17 @@ static void __init iop_clocksource_set_hz(struct clocksource *cs, unsigned int h
}
/*
+ * IOP sched_clock() implementation via its clocksource.
+ */
+unsigned long long sched_clock(void)
+{
+ cycle_t cyc = iop_clocksource_read(NULL);
+ struct clocksource *cs = &iop_clocksource;
+
+ return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
+}
+
+/*
* IOP clockevents (interrupting timer 0).
*/
static int iop_set_next_event(unsigned long delta,