PM / devfreq: add tracing for scheduling work

This patch add basic tracing of the devfreq workqueue and delayed work.
It aims to capture changes of the polling intervals and device state.

Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 8928383a1fa1..6b6991f0e873 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -29,6 +29,9 @@
 #include <linux/of.h>
 #include "governor.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/devfreq.h>
+
 static struct class *devfreq_class;
 
 /*
@@ -394,6 +397,8 @@ static void devfreq_monitor(struct work_struct *work)
         queue_delayed_work(devfreq_wq, &devfreq->work,
                                 msecs_to_jiffies(devfreq->profile->polling_ms));
         mutex_unlock(&devfreq->lock);
+
+        trace_devfreq_monitor(devfreq);
 }
 
 /**