diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2022-12-02 19:35:27 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2022-12-06 12:46:23 +0100 |
| commit | 3dae106f4ca358bb1d8d8708d3289fa130b1ad5b (patch) | |
| tree | a5e835dafe20b348090dbec0616d7185452e3754 /drivers/pwm | |
| parent | 6c452cff79f8bf1c0146fda598d32061cfd25443 (diff) | |
| download | linux-3dae106f4ca358bb1d8d8708d3289fa130b1ad5b.tar.bz2 | |
pwm/tracing: Also record trace events for failed API calls
Record and report an error code for the events. This allows to report
about failed calls without ambiguity and so gives a more complete
picture.
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20221130152148.2769768-3-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/core.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 3a0967209853..61d15510fdd7 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -115,8 +115,8 @@ static int pwm_device_request(struct pwm_device *pwm, const char *label) } if (pwm->chip->ops->get_state) { - pwm->chip->ops->get_state(pwm->chip, pwm, &pwm->state); - trace_pwm_get(pwm, &pwm->state); + err = pwm->chip->ops->get_state(pwm->chip, pwm, &pwm->state); + trace_pwm_get(pwm, &pwm->state, err); if (IS_ENABLED(CONFIG_PWM_DEBUG)) pwm->last = pwm->state; @@ -458,8 +458,8 @@ static void pwm_apply_state_debug(struct pwm_device *pwm, * checks. */ - chip->ops->get_state(chip, pwm, &s1); - trace_pwm_get(pwm, &s1); + err = chip->ops->get_state(chip, pwm, &s1); + trace_pwm_get(pwm, &s1, err); /* * The lowlevel driver either ignored .polarity (which is a bug) or as @@ -515,16 +515,15 @@ static void pwm_apply_state_debug(struct pwm_device *pwm, /* reapply the state that the driver reported being configured. */ err = chip->ops->apply(chip, pwm, &s1); + trace_pwm_apply(pwm, &s1, err); if (err) { *last = s1; dev_err(chip->dev, "failed to reapply current setting\n"); return; } - trace_pwm_apply(pwm, &s1); - - chip->ops->get_state(chip, pwm, last); - trace_pwm_get(pwm, last); + err = chip->ops->get_state(chip, pwm, last); + trace_pwm_get(pwm, last, err); /* reapplication of the current state should give an exact match */ if (s1.enabled != last->enabled || @@ -572,11 +571,10 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state) return 0; err = chip->ops->apply(chip, pwm, state); + trace_pwm_apply(pwm, state, err); if (err) return err; - trace_pwm_apply(pwm, state); - pwm->state = *state; /* |