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| author | Thierry Reding <thierry.reding@gmail.com> | 2016-07-25 16:23:39 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2016-07-25 16:23:39 +0200 |
| commit | bd2686122d3b45db1398776921bd47fedfd6d6a5 (patch) | |
| tree | a4c9e124eefb9da5434e39f628ee732a597d30c5 /drivers/pwm/core.c | |
| parent | 489babeae6b9386af25fe6dc3bc727a51ff5d962 (diff) | |
| parent | 1a366fe9153f445e950a7a344932b7419aa83094 (diff) | |
| download | linux-bd2686122d3b45db1398776921bd47fedfd6d6a5.tar.gz linux-bd2686122d3b45db1398776921bd47fedfd6d6a5.tar.bz2 linux-bd2686122d3b45db1398776921bd47fedfd6d6a5.zip | |
Merge branch 'for-4.8/capture' into for-next
Diffstat (limited to 'drivers/pwm/core.c')
| -rw-r--r-- | drivers/pwm/core.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index ed337a8c34ab..0dbd29e287db 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -526,6 +526,33 @@ int pwm_apply_state(struct pwm_device *pwm, struct pwm_state *state) EXPORT_SYMBOL_GPL(pwm_apply_state); /** + * pwm_capture() - capture and report a PWM signal + * @pwm: PWM device + * @result: structure to fill with capture result + * @timeout: time to wait, in milliseconds, before giving up on capture + * + * Returns: 0 on success or a negative error code on failure. + */ +int pwm_capture(struct pwm_device *pwm, struct pwm_capture *result, + unsigned long timeout) +{ + int err; + + if (!pwm || !pwm->chip->ops) + return -EINVAL; + + if (!pwm->chip->ops->capture) + return -ENOSYS; + + mutex_lock(&pwm_lock); + err = pwm->chip->ops->capture(pwm->chip, pwm, result, timeout); + mutex_unlock(&pwm_lock); + + return err; +} +EXPORT_SYMBOL_GPL(pwm_capture); + +/** * pwm_adjust_config() - adjust the current PWM config to the PWM arguments * @pwm: PWM device * |