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iio: Add iio_device_get() 

This patch add the iio_device_get() function, which increases the reference
count of a iio device. The matching function to decrease the reference count -
iio_device_put() - already exists.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lars-Peter Clausen 2012-06-04 10:50:02 +02:00 committed by Greg Kroah-Hartman
parent 44dd5b0253
commit e4e8b77658
1 changed files with 11 additions and 0 deletions
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include/linux/iio/iio.h
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@ -438,6 +438,17 @@ static inline struct iio_dev *dev_to_iio_dev(struct device *dev)
return container_of(dev, struct iio_dev, dev); return container_of(dev, struct iio_dev, dev);
} }
/**
* iio_device_get() - increment reference count for the device
* @indio_dev: IIO device structure
*
* Returns: The passed IIO device
**/
static inline struct iio_dev *iio_device_get(struct iio_dev *indio_dev)
{
return indio_dev ? dev_to_iio_dev(get_device(&indio_dev->dev)) : NULL;
}
/* Can we make this smaller? */ /* Can we make this smaller? */
#define IIO_ALIGN L1_CACHE_BYTES #define IIO_ALIGN L1_CACHE_BYTES
/** /**