xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pwm: Implement tracing for .get_state() and .apply_state()

Browse Source 
This allows to log all calls to the driver's lowlevel functions which
simplifies debugging in some cases.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Uwe Kleine-König
2019-10-24 10:08:29 +02:00
committed by Thierry Reding
parent af4fab8bed
commit 1188829abc
2 changed files with 66 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/pwm/core.c
View File

@@ -20,6 +20,9 @@
#include <dt-bindings/pwm/pwm.h>
#define CREATE_TRACE_POINTS
#include <trace/events/pwm.h>
#define MAX_PWMS 1024
static DEFINE_MUTEX(pwm_lookup_lock);
@@ -114,8 +117,10 @@ static int pwm_device_request(struct pwm_device *pwm, const char *label)
}
}
if (pwm->chip->ops->get_state)
if (pwm->chip->ops->get_state) {
pwm->chip->ops->get_state(pwm->chip, pwm, &pwm->state);
trace_pwm_get(pwm, &pwm->state);
}
set_bit(PWMF_REQUESTED, &pwm->flags);
pwm->label = label;
@@ -472,6 +477,8 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state)
if (err)
return err;
trace_pwm_apply(pwm, state);
pwm->state = *state;
} else {
/*