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devfreq_cooling: add trace information

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Tracing is useful for debugging and performance tuning.  Add similar
traces to what's present in the cpu cooling device.

Cc: Zhang Rui <[email protected]>
Cc: Eduardo Valentin <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Javi Merino <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
This commit is contained in:
Javi Merino 2015-09-10 18:09:31 +01:00 • committed by Eduardo Valentin
commit 9876b1a443
2 changed files with 59 additions and 0 deletions
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6
drivers/thermal/devfreq_cooling.c
View file

@ -25,6 +25,8 @@
#include <linux/pm_opp.h>
#include <linux/thermal.h>
#include <trace/events/thermal.h>
static DEFINE_MUTEX(devfreq_lock);
static DEFINE_IDR(devfreq_idr);
@ -293,6 +295,9 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd
/* Get static power */
static_power = get_static_power(dfc, freq);
trace_thermal_power_devfreq_get_power(cdev, status, freq, dyn_power,
static_power);
*power = dyn_power + static_power;
return 0;
@ -348,6 +353,7 @@ static int devfreq_cooling_power2state(struct thermal_cooling_device *cdev,
break;
*state = i;
trace_thermal_power_devfreq_limit(cdev, freq, *state, power);
return 0;
}