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| author | Matthias Kaehlcke <mka@chromium.org> | 2020-10-07 22:03:59 +0900 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2020-10-26 10:52:37 +0900 |
| commit | cab477d0d4fbae1ed68d3db0b52cb5449a3c5868 (patch) | |
| tree | 2dc9a7a20020327208af08ef50e32160bccb856d /drivers/devfreq | |
| parent | b4365423bb7adf9feb4659126eaec374dfbde806 (diff) | |
| download | lwn-cab477d0d4fbae1ed68d3db0b52cb5449a3c5868.tar.gz lwn-cab477d0d4fbae1ed68d3db0b52cb5449a3c5868.zip | |
PM / devfreq: Add tracepoint for frequency changes
Add a tracepoint for frequency changes of devfreq devices and
use it.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
[cw00.choi: Move print position of tracepoint and add more information]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/devfreq.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index ab5dd9d5fdc7..1b236b9e4d9e 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -367,6 +367,14 @@ static int devfreq_set_target(struct devfreq *devfreq, unsigned long new_freq, return err; } + /* + * Print devfreq_frequency trace information between DEVFREQ_PRECHANGE + * and DEVFREQ_POSTCHANGE because for showing the correct frequency + * change order of between devfreq device and passive devfreq device. + */ + if (trace_devfreq_frequency_enabled() && new_freq != cur_freq) + trace_devfreq_frequency(devfreq, new_freq, cur_freq); + freqs.new = new_freq; devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE); |