[PATCH 5/8] iio: core: add high pass filter attributes

[Martin Fuzzey <mfuzzey@parkeon.com>]

Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
---
 Documentation/ABI/testing/sysfs-bus-iio |   10 ++++++++++
 drivers/iio/industrialio-core.c         |    2 ++
 include/linux/iio/iio.h                 |    1 +
 3 files changed, 13 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index a9757dc..4825139 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -340,6 +340,16 @@ Description:
 		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_magn_filter_high_pass_3db_frequency
+What:		/sys/.../in_anglvel_filter_high_pass_3db_frequency
+KernelVersion:	3.17
+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
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index fa06197..967468d 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -103,6 +103,8 @@ static const char * const iio_chan_info_postfix[] = {
 	[IIO_CHAN_INFO_AVERAGE_RAW] = "mean_raw",
 	[IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY]
 	= "filter_low_pass_3db_frequency",
+	[IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY]
+	= "filter_high_pass_3db_frequency",
 	[IIO_CHAN_INFO_SAMP_FREQ] = "sampling_frequency",
 	[IIO_CHAN_INFO_FREQUENCY] = "frequency",
 	[IIO_CHAN_INFO_PHASE] = "phase",
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index ccde917..88a255d 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -31,6 +31,7 @@ enum iio_chan_info_enum {
 	IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW,
 	IIO_CHAN_INFO_AVERAGE_RAW,
 	IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY,
+	IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY,
 	IIO_CHAN_INFO_SAMP_FREQ,
 	IIO_CHAN_INFO_FREQUENCY,
 	IIO_CHAN_INFO_PHASE,