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Commit 2d66f389 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

iio: Introduce iio_device_{set,get}_drvdata() 



Introduce two new helper functions to attach a arbitrary pointer to a IIO
device. This is useful to get access to external non-global data from within a
IIO device callbacks where only the IIO device is available.

Internally these functions use dev_{set,get}_drvdata() on the struct device
embedded in the IIO device.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 49f8812e

include/linux/iio/iio.h

+25 −0
Original line number Diff line number Diff line
@@ -516,6 +516,31 @@ 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;

}





/**

 * iio_device_set_drvdata() - Set device driver data

 * @indio_dev: IIO device structure

 * @data: Driver specific data

 *

 * Allows to attach an arbitrary pointer to an IIO device, which can later be

 * retrieved by iio_device_get_drvdata().

 */

static inline void iio_device_set_drvdata(struct iio_dev *indio_dev, void *data)

{

	dev_set_drvdata(&indio_dev->dev, data);

}



/**

 * iio_device_get_drvdata() - Get device driver data

 * @indio_dev: IIO device structure

 *

 * Returns the data previously set with iio_device_set_drvdata()

 */

static inline void *iio_device_get_drvdata(struct iio_dev *indio_dev)

{

	return dev_get_drvdata(&indio_dev->dev);

}



/* Can we make this smaller? */

#define IIO_ALIGN L1_CACHE_BYTES

/**