diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2012-05-12 15:39:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-14 13:34:31 -0700 |
| commit | 7a7913f11ddf932e20d2bde72bec57f2f7a9b49e (patch) | |
| tree | 8494f244143cae26b4b470aeee59209323ccb0d0 | |
| parent | 7086e6e5baae90047ecfb1416082409634868e66 (diff) | |
iio: Add dev_to_iio_dev() helper function
This patch adds a helper function for retriving a iio_dev struct from a device
struct. Currently we open-code this in two different ways. One is using
dev_get_drvdata on the device and the other is using container_of. The new
helper function uses the container_of solution as it creates slightly smaller
code and also will eventually free up the drvdata pointer for usage by invidual
drivers.
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>
| -rw-r--r-- | include/linux/iio/iio.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 897c6b01d784..3a4f6a3ab80d 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -427,6 +427,17 @@ static inline void iio_device_put(struct iio_dev *indio_dev) put_device(&indio_dev->dev); }; +/** + * dev_to_iio_dev() - Get IIO device struct from a device struct + * @dev: The device embedded in the IIO device + * + * Note: The device must be a IIO device, otherwise the result is undefined. + */ +static inline struct iio_dev *dev_to_iio_dev(struct device *dev) +{ + return container_of(dev, struct iio_dev, dev); +} + /* Can we make this smaller? */ #define IIO_ALIGN L1_CACHE_BYTES /** |