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Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-iio')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 580b3f85437b..0b6f0abf3370 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -1280,3 +1280,18 @@ Contact: linux-iio@vger.kernel.org Description: Specifies number of seconds in which we compute the steps that occur in order to decide if the consumer is making steps. + +What: /sys/bus/iio/devices/iio:deviceX/buffer/watermark +KernelVersion: 4.2 +Contact: linux-iio@vger.kernel.org +Description: + A single positive integer specifying the maximum number of scan + elements to wait for. + Poll will block until the watermark is reached. + Blocking read will wait until the minimum between the requested + read amount or the low water mark is available. + Non-blocking read will retrieve the available samples from the + buffer even if there are less samples then watermark level. This + allows the application to block on poll with a timeout and read + the available samples after the timeout expires and thus have a + maximum delay guarantee. |