kernel/Documentation/ABI/testing/sysfs-bus-counter

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What: /sys/bus/counter/devices/counterX/countY/spike_filter_ns
KernelVersion: 5.14
Contact: linux-iio@vger.kernel.org
Description:
If the counter device supports programmable spike filter this
attribute indicates the value in nanoseconds where noise pulses
shorter or equal to configured value are ignored. Value 0 means
filter is disabled.