diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iio/iio.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index a9ecff191bd9..2c91b7659ce9 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -931,6 +931,18 @@ static inline void *iio_device_get_drvdata(const struct iio_dev *indio_dev) #define IIO_DECLARE_DMA_BUFFER_WITH_TS(type, name, count) \ __IIO_DECLARE_BUFFER_WITH_TS(type, name, count) __aligned(IIO_DMA_MINALIGN) +/** + * IIO_DECLARE_QUATERNION() - Declare a quaternion element + * @type: element type of the individual vectors + * @name: identifier name + * + * Quaternions are a vector composed of 4 elements (W, X, Y, Z). Use this macro + * to declare a quaternion element in a struct to ensure proper alignment in + * an IIO buffer. + */ +#define IIO_DECLARE_QUATERNION(type, name) \ + type name[4] __aligned(sizeof(type) * 4) + struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv); /* The information at the returned address is guaranteed to be cacheline aligned */ |