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authorFlorian Vaussard <florian.vaussard@epfl.ch>2013-01-28 15:00:57 +0100
committerThierry Reding <thierry.reding@avionic-design.de>2013-01-30 09:12:18 +0100
commit6e69ab1361c44e3ee1398158b56d114b1aef8179 (patch)
tree44994b7b6cdfebaf1de44473597bb5a9adf2f912 /drivers/pwm
parent0132267d659107616eb044777f1b0be55381129a (diff)
downloadvexpress-lsk-6e69ab1361c44e3ee1398158b56d114b1aef8179.tar.gz
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.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 903138b1884..ffbef95e88d 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)
{