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>
diff --git a/arch/arm/plat-iop/time.c b/arch/arm/plat-iop/time.c
index aaaef3b..6c8a02a 100644
--- a/arch/arm/plat-iop/time.c
+++ b/arch/arm/plat-iop/time.c
@@ -66,6 +66,17 @@
}
/*
+ * 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,