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-rw-r--r--arch/tile/kernel/time.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/tile/kernel/time.c b/arch/tile/kernel/time.c
index f2e156e4469..49a605be94c 100644
--- a/arch/tile/kernel/time.c
+++ b/arch/tile/kernel/time.c
@@ -224,3 +224,13 @@ int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
+
+/*
+ * Use the tile timer to convert nsecs to core clock cycles, relying
+ * on it having the same frequency as SPR_CYCLE.
+ */
+cycles_t ns2cycles(unsigned long nsecs)
+{
+ struct clock_event_device *dev = &__get_cpu_var(tile_timer);
+ return ((u64)nsecs * dev->mult) >> dev->shift;
+}