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| author |   Lars-Peter Clausen <lars@metafoo.de> | 2012-07-09 10:00:00 +0100 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2012-07-09 18:18:15 +0100 |
| commit | 81636632057cc1bece2531220dd5803036f95ea9 (patch) | |
| tree | 6c1d73dbc88d32e49a2c5b44423a972a9b8da0c0 /include/linux/iio/buffer.h | |
| parent | iio: Add callback to check whether a scan mask is valid (diff) | |
| download | linux-dev-81636632057cc1bece2531220dd5803036f95ea9.tar.xz linux-dev-81636632057cc1bece2531220dd5803036f95ea9.zip | |
iio: Introduce iio_validate_scan_mask_onehot
Add a helper function for validating a scan mask for devices where exactly one
channel must be selected during sampling. This is a common case among devices
which have scan mask restrictions so it makes sense to provide this function in
the core.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'include/linux/iio/buffer.h')
| -rw-r--r-- | include/linux/iio/buffer.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 2a2b6b4d8d05..8ba516fc2ec6 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -177,6 +177,9 @@ ssize_t iio_buffer_show_enable(struct device *dev, int iio_sw_buffer_preenable(struct iio_dev *indio_dev); +bool iio_validate_scan_mask_onehot(struct iio_dev *indio_dev, + const unsigned long *mask); + #else /* CONFIG_IIO_BUFFER */ static inline int iio_buffer_register(struct iio_dev *indio_dev, |