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authorJacek Anaszewski <j.anaszewski@samsung.com>2013-08-16 14:11:00 +0100
committerJonathan Cameron <jic23@kernel.org>2013-08-17 19:34:52 +0100
commitd536321df392ee0db6a5e92d98f0303020315f40 (patch)
treec3616492e72328c7a76ab22445d61f9bb167628c /include/linux/iio
parent1696f36482e7063051a1dad86a54be83fd847f4f (diff)
downloadop-kernel-dev-d536321df392ee0db6a5e92d98f0303020315f40.zip
op-kernel-dev-d536321df392ee0db6a5e92d98f0303020315f40.tar.gz
iio: trigger: implement devm_iio_trigger_alloc/devm_iio_triger_free
Add a resource managed devm_iio_trigger_alloc()/devm_iio_triger_free() to automatically clean up triggers allocated by IIO drivers, thus leading to simplified IIO drivers code. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Kyunmin Park <kyungmin.park@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'include/linux/iio')
-rw-r--r--include/linux/iio/iio.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 09ebe0a..2103cc3 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -557,6 +557,35 @@ struct iio_dev *devm_iio_device_alloc(struct device *dev, int sizeof_priv);
void devm_iio_device_free(struct device *dev, struct iio_dev *indio_dev);
/**
+ * devm_iio_trigger_alloc - Resource-managed iio_trigger_alloc()
+ * @dev: Device to allocate iio_trigger for
+ * @fmt: trigger name format. If it includes format
+ * specifiers, the additional arguments following
+ * format are formatted and inserted in the resulting
+ * string replacing their respective specifiers.
+ *
+ * Managed iio_trigger_alloc. iio_trigger allocated with this function is
+ * automatically freed on driver detach.
+ *
+ * If an iio_trigger allocated with this function needs to be freed separately,
+ * devm_iio_trigger_free() must be used.
+ *
+ * RETURNS:
+ * Pointer to allocated iio_trigger on success, NULL on failure.
+ */
+struct iio_trigger *devm_iio_trigger_alloc(struct device *dev,
+ const char *fmt, ...);
+
+/**
+ * devm_iio_trigger_free - Resource-managed iio_trigger_free()
+ * @dev: Device this iio_dev belongs to
+ * @iio_trig: the iio_trigger associated with the device
+ *
+ * Free iio_trigger allocated with devm_iio_trigger_alloc().
+ */
+void devm_iio_trigger_free(struct device *dev, struct iio_trigger *iio_trig);
+
+/**
* iio_buffer_enabled() - helper function to test if the buffer is enabled
* @indio_dev: IIO device structure for device
**/
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