iio: add watermark logic to iio read and poll
Currently the IIO buffer blocking read only wait until at least one
data element is available.
This patch makes the reader sleep until enough data is collected before
returning to userspace. This should limit the read() calls count when
trying to get data in batches.
Co-author: Yannick Bedhomme <[email protected]>
Signed-off-by: Josselin Costanzi <[email protected]>
[rebased and remove buffer timeout]
Signed-off-by: Octavian Purdila <[email protected]>
Reviewed-by: Lars-Peter Clausen <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
5 files changed
