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authorLars-Peter Clausen <lars@metafoo.de>2012-07-09 13:00:00 +0400
committerJonathan Cameron <jic23@kernel.org>2012-07-09 21:18:15 +0400
commit81636632057cc1bece2531220dd5803036f95ea9 (patch)
tree6c1d73dbc88d32e49a2c5b44423a972a9b8da0c0 /include/linux/iio
parent939546d1a9f47ed169554c711e1e05965b84ffe1 (diff)
downloadlinux-81636632057cc1bece2531220dd5803036f95ea9.tar.xz
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')
-rw-r--r--include/linux/iio/buffer.h3
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,