rk_timer: support sched_clock

diff --git a/arch/arm/plat-rk/rk_timer.c b/arch/arm/plat-rk/rk_timer.c
index 24dc1b508ce8afc1582b7fac6e66a6d38ccd6208..51e5e5934b8d672e00e5caa376e2a6a9db09371b 100644 (file)
--- a/arch/arm/plat-rk/rk_timer.c
+++ b/arch/arm/plat-rk/rk_timer.c
@@ -282,3 +282,18 @@ int local_timer_ack(void)
        return 0;
 }
 #endif
+
+/*
+ * Scheduler clock - returns current time in nanosec units.
+ */
+unsigned long long notrace sched_clock(void)
+{
+       const struct clocksource *cs = &rk_timer_clocksource;
+       cycle_t cyc;
+
+       if (!timer.cs_base)
+               return 0;
+
+       cyc = ~rk_timer_read_current_value(timer.cs_base);
+       return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
+}