MIPS: Octeon: Add sched_clock() to csrc-octeon.c
With the advent of function graph tracing on MIPS, Octeon needs a high
precision sched_clock() implementation. Without it, most timing
numbers are reported as 0.000.
This new sched_clock just uses the 64-bit cycle counter appropriately
scaled.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Patchwork: http://patchwork.linux-mips.org/patch/805/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/cavium-octeon/csrc-octeon.c b/arch/mips/cavium-octeon/csrc-octeon.c
index 96110f2..96df821 100644
--- a/arch/mips/cavium-octeon/csrc-octeon.c
+++ b/arch/mips/cavium-octeon/csrc-octeon.c
@@ -50,6 +50,13 @@
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
+unsigned long long notrace sched_clock(void)
+{
+ return clocksource_cyc2ns(read_c0_cvmcount(),
+ clocksource_mips.mult,
+ clocksource_mips.shift);
+}
+
void __init plat_time_init(void)
{
clocksource_mips.rating = 300;