iio: allow userspace to flush the hwfifo with non-blocking reads

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This patch changes the semantics of non-blocking reads so that a
hardware fifo flush is triggered if the available data in the device
buffer is less then the requested size.

This allows userspace to accurately generate hardware fifo flushes, by
doing a non-blocking read with a size greater then the sum of the
device buffer and hardware fifo size.

Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

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Octavian Purdila 2015-06-05 15:56:47 +03:00 • committed by Jonathan Cameron

parent e20008ed93

commit c6f67a1f55

1 changed files with 9 additions and 9 deletions

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18

drivers/iio/industrialio-buffer.c

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