[PATCH 3/3] staging:iio:documentation: document filter_low_pass_3db_frequency.

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From: Jonathan Cameron <jic23@xxxxxxxxx>

Add the sysfs ABI docs for all current instances of this
parameter.

Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxx>
---
 drivers/staging/iio/Documentation/sysfs-bus-iio |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/staging/iio/Documentation/sysfs-bus-iio
index 0d6823d..46a995d 100644
--- a/drivers/staging/iio/Documentation/sysfs-bus-iio
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio
@@ -276,6 +276,16 @@ Description:
 		If a discrete set of scale values are available, they
 		are listed in this attribute.
 
+What:		/sys/.../in_accel_filter_low_pass_3db_frequency
+What:		/sys/.../in_magn_filter_low_pass_3db_frequency
+What:		/sys/.../in_anglvel_filter_low_pass_3db_frequency
+KernelVersion:	3.2
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		If a known or controllable low pass filter is applied
+		to the underlying data channel, then this parameter
+		gives the 3dB frequency of the filter in Hz.
+
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
 KernelVersion:	2.6.37
 Contact:	linux-iio@xxxxxxxxxxxxxxx
-- 
1.7.7.3

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