iio: buffer: Expose data available

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Add a sysfs attribute that exposes buffer data available to userspace.
This attribute can be checked at runtime to determine the overall buffer
fill level (across all allocated buffers).

Signed-off-by: Matt Fornero <matt.fornero@mathworks.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Matt Fornero 2017-12-06 14:43:30 -05:00 • committed by Greg Kroah-Hartman

parent 80e3f0103e

commit 350f6c75f6

2 changed files with 25 additions and 0 deletions

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10

Documentation/ABI/testing/sysfs-bus-iio

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15

drivers/iio/industrialio-buffer.c

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