Add a high pass filter attribute for measurements (like the existing low pass)
Also add both high and low pass attibutes for events.
Signed-off-by: Martin Fuzzey <mfuzzey@xxxxxxxxxxx>
---
Documentation/ABI/testing/sysfs-bus-iio | 30 ++++++++++++++++++++++++++++++
drivers/iio/industrialio-core.c | 2 ++
drivers/iio/industrialio-event.c | 2 ++
include/linux/iio/iio.h | 1 +
include/linux/iio/types.h | 2 ++
5 files changed, 37 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 117521d..ab592dd 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -358,6 +358,16 @@ 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: 3.21
+Contact: linux-iio@xxxxxxxxxxxxxxx
+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
@@ -790,6 +800,26 @@ Description:
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: 3.21
+Contact: linux-iio@xxxxxxxxxxxxxxx
+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: 3.21
+Contact: linux-iio@xxxxxxxxxxxxxxx
+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/.../iio:deviceX/events/in_accel_mag_en
What: /sys/.../iio:deviceX/events/in_accel_mag_rising_en
What: /sys/.../iio:deviceX/events/in_accel_mag_falling_en
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index f009d05..94b1b28 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -107,6 +107,8 @@ 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/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index 35c02ae..4321380 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -210,6 +210,8 @@ static const char * const iio_ev_info_text[] = {
[IIO_EV_INFO_VALUE] = "value",
[IIO_EV_INFO_HYSTERESIS] = "hysteresis",
[IIO_EV_INFO_PERIOD] = "period",
+ [IIO_EV_INFO_HIGH_PASS_FILTER_3DB] = "high_pass_filter_3db",
+ [IIO_EV_INFO_LOW_PASS_FILTER_3DB] = "low_pass_filter_3db",
};
static enum iio_event_direction iio_ev_attr_dir(struct iio_dev_attr *attr)
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 3642ce7..3ce2793 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -32,6 +32,7 @@ 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,
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 4a2af8a..fc5c123 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -75,6 +75,8 @@ enum iio_event_info {
IIO_EV_INFO_VALUE,
IIO_EV_INFO_HYSTERESIS,
IIO_EV_INFO_PERIOD,
+ IIO_EV_INFO_HIGH_PASS_FILTER_3DB,
+ IIO_EV_INFO_LOW_PASS_FILTER_3DB,
};
enum iio_event_direction {
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
