diff options
| author | Florian Vaussard <florian.vaussard@epfl.ch> | 2013-01-28 15:00:57 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@avionic-design.de> | 2013-01-30 09:12:18 +0100 |
| commit | 6e69ab1361c44e3ee1398158b56d114b1aef8179 (patch) | |
| tree | 44994b7b6cdfebaf1de44473597bb5a9adf2f912 /drivers/pwm | |
| parent | pwm-backlight: handle BL_CORE_FBBLANK state (diff) | |
| download | linux-6e69ab1361c44e3ee1398158b56d114b1aef8179.tar.xz linux-6e69ab1361c44e3ee1398158b56d114b1aef8179.zip | |
pwm: Add pwm_can_sleep() as exported API to users
Calls to some external PWM chips can sleep. To help users,
add pwm_can_sleep() API.
Cc: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 903138b18842..ffbef95e88dc 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -733,6 +733,18 @@ void devm_pwm_put(struct device *dev, struct pwm_device *pwm) } EXPORT_SYMBOL_GPL(devm_pwm_put); +/** + * pwm_can_sleep() - report whether PWM access will sleep + * @pwm: PWM device + * + * It returns true if accessing the PWM can sleep, false otherwise. + */ +bool pwm_can_sleep(struct pwm_device *pwm) +{ + return pwm->chip->can_sleep; +} +EXPORT_SYMBOL_GPL(pwm_can_sleep); + #ifdef CONFIG_DEBUG_FS static void pwm_dbg_show(struct pwm_chip *chip, struct seq_file *s) { |