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 <[email protected]> Acked-by: Jonathan Cameron <[email protected]> --- include/linux/iio/iio.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index eff2a39..38baea5 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -412,6 +412,17 @@ int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp); extern struct bus_type iio_bus_type; +/** + * 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 /** -- 1.7.10 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
