diff options
| author |   Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2019-10-24 10:08:29 +0200 |
|---|---|---|
| committer |   Thierry Reding <thierry.reding@gmail.com> | 2020-01-20 12:28:37 +0100 |
| commit | 1188829abc2abbef0da7a082fdb6a315a050a0a0 (patch) | |
| tree | fc535004ec0e6835c14bd9a341a8f615b0f36f6c /drivers/pwm | |
| parent | pwm: rcar: Document inability to set duty_cycle = 0 (diff) | |
| download | linux-dev-1188829abc2abbef0da7a082fdb6a315a050a0a0.tar.xz linux-dev-1188829abc2abbef0da7a082fdb6a315a050a0a0.zip | |
pwm: Implement tracing for .get_state() and .apply_state()
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>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/core.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index e067873c6cc5..5a7f6598c05f 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -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 { /* |