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pwm: Add pwm_can_sleep() as exported API to users

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Calls to some external PWM chips can sleep. To help users,
add pwm_can_sleep() API.

Cc: Thierry Reding <[email protected]>
Cc: Peter Ujfalusi <[email protected]>
Signed-off-by: Florian Vaussard <[email protected]>
Reviewed-by: Peter Ujfalusi <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
This commit is contained in:
Florian Vaussard 2013-01-28 15:00:57 +01:00 • committed by Thierry Reding
commit 6e69ab1361
2 changed files with 22 additions and 0 deletions
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12
drivers/pwm/core.c
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@ -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)
{