iio: core: add high pass filter attributes
Add a high pass filter attribute for measurements
(like the existing low pass)
Also add both high and low pass attributes for events.
Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index e46c71f..f66262c 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -420,6 +420,16 @@
to the underlying data channel, then this parameter
gives the 3dB frequency of the filter in Hz.
+What: /sys/.../in_accel_filter_high_pass_3db_frequency
+What: /sys/.../in_anglvel_filter_high_pass_3db_frequency
+What: /sys/.../in_magn_filter_high_pass_3db_frequency
+KernelVersion: 4.2
+Contact: linux-iio@vger.kernel.org
+Description:
+ If a known or controllable high 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
What: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw
KernelVersion: 2.6.37
@@ -880,6 +890,26 @@
met before an event is generated. If direction is not
specified then this period applies to both directions.
+What: /sys/.../events/in_accel_thresh_rising_low_pass_filter_3db
+What: /sys/.../events/in_anglvel_thresh_rising_low_pass_filter_3db
+What: /sys/.../events/in_magn_thresh_rising_low_pass_filter_3db
+KernelVersion: 4.2
+Contact: linux-iio@vger.kernel.org
+Description:
+ If a low pass filter can be applied to the event generation
+ this property gives its 3db frequency in Hz.
+ A value of zero disables the filter.
+
+What: /sys/.../events/in_accel_thresh_rising_high_pass_filter_3db
+What: /sys/.../events/in_anglvel_thresh_rising_high_pass_filter_3db
+What: /sys/.../events/in_magn_thresh_rising_high_pass_filter_3db
+KernelVersion: 4.2
+Contact: linux-iio@vger.kernel.org
+Description:
+ If a high pass filter can be applied to the event generation
+ this property gives its 3db frequency in Hz.
+ A value of zero disables the filter.
+
What: /sys/.../events/in_activity_still_thresh_rising_en
What: /sys/.../events/in_activity_still_thresh_falling_en
What: /sys/.../events/in_activity_walking_thresh_rising_en
