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author | Lars-Peter Clausen <lars@metafoo.de> | 2013-10-07 15:11:00 +0100 |
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committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-12 12:51:35 +0100 |
commit | ec6670ae53c13d767bdb7b3e37755ad661395380 (patch) | |
tree | fbe793a33031e7aed145f84d096b7a68cde915cf | |
parent | 3ea48e01247f07185480e82a79c201df9d905f50 (diff) | |
download | blackbird-op-linux-ec6670ae53c13d767bdb7b3e37755ad661395380.tar.gz blackbird-op-linux-ec6670ae53c13d767bdb7b3e37755ad661395380.zip |
iio: Add a hysteresis event info attribute
For some devices it is possible to configure a hysteresis for threshold (or
similar) events. This patch adds a new hysteresis event info type which allows
for easy creation and read/write handling of the sysfs attribute.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
-rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 56 | ||||
-rw-r--r-- | drivers/iio/industrialio-event.c | 1 | ||||
-rw-r--r-- | include/linux/iio/types.h | 1 |
3 files changed, 58 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 2d73620874b2..b20e829d350f 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -537,6 +537,62 @@ Description: value is in raw device units or in processed units (as _raw and _input do on sysfs direct channel read attributes). +What: /sys/.../events/in_accel_x_thresh_rising_hysteresis +What: /sys/.../events/in_accel_x_thresh_falling_hysteresis +What: /sys/.../events/in_accel_x_thresh_either_hysteresis +What: /sys/.../events/in_accel_y_thresh_rising_hysteresis +What: /sys/.../events/in_accel_y_thresh_falling_hysteresis +What: /sys/.../events/in_accel_y_thresh_either_hysteresis +What: /sys/.../events/in_accel_z_thresh_rising_hysteresis +What: /sys/.../events/in_accel_z_thresh_falling_hysteresis +What: /sys/.../events/in_accel_z_thresh_either_hysteresis +What: /sys/.../events/in_anglvel_x_thresh_rising_hysteresis +What: /sys/.../events/in_anglvel_x_thresh_falling_hysteresis +What: /sys/.../events/in_anglvel_x_thresh_either_hysteresis +What: /sys/.../events/in_anglvel_y_thresh_rising_hysteresis +What: /sys/.../events/in_anglvel_y_thresh_falling_hysteresis +What: /sys/.../events/in_anglvel_y_thresh_either_hysteresis +What: /sys/.../events/in_anglvel_z_thresh_rising_hysteresis +What: /sys/.../events/in_anglvel_z_thresh_falling_hysteresis +What: /sys/.../events/in_anglvel_z_thresh_either_hysteresis +What: /sys/.../events/in_magn_x_thresh_rising_hysteresis +What: /sys/.../events/in_magn_x_thresh_falling_hysteresis +What: /sys/.../events/in_magn_x_thresh_either_hysteresis +What: /sys/.../events/in_magn_y_thresh_rising_hysteresis +What: /sys/.../events/in_magn_y_thresh_falling_hysteresis +What: /sys/.../events/in_magn_y_thresh_either_hysteresis +What: /sys/.../events/in_magn_z_thresh_rising_hysteresis +What: /sys/.../events/in_magn_z_thresh_falling_hysteresis +What: /sys/.../events/in_magn_z_thresh_either_hysteresis +What: /sys/.../events/in_voltageY_thresh_rising_hysteresis +What: /sys/.../events/in_voltageY_thresh_falling_hysteresis +What: /sys/.../events/in_voltageY_thresh_either_hysteresis +What: /sys/.../events/in_tempY_thresh_rising_hysteresis +What: /sys/.../events/in_tempY_thresh_falling_hysteresis +What: /sys/.../events/in_tempY_thresh_either_hysteresis +What: /sys/.../events/in_illuminance0_thresh_falling_hysteresis +what: /sys/.../events/in_illuminance0_thresh_rising_hysteresis +what: /sys/.../events/in_illuminance0_thresh_either_hysteresis +what: /sys/.../events/in_proximity0_thresh_falling_hysteresis +what: /sys/.../events/in_proximity0_thresh_rising_hysteresis +what: /sys/.../events/in_proximity0_thresh_either_hysteresis +KernelVersion: 3.13 +Contact: linux-iio@vger.kernel.org +Description: + Specifies the hysteresis of threshold that the device is comparing + against for the events enabled by + <type>Y[_name]_thresh[_(rising|falling)]_hysteresis. + If separate attributes exist for the two directions, but + direction is not specified for this attribute, then a single + hysteresis value applies to both directions. + For falling events the hysteresis is added to the _value attribute for + this event to get the upper threshold for when the event goes back to + normal, for rising events the hysteresis is subtracted from the _value + attribute. E.g. if in_voltage0_raw_thresh_rising_value is set to 1200 + and in_voltage0_raw_thresh_rising_hysteresis is set to 50. The event + will get activated once in_voltage0_raw goes above 1200 and will become + deactived again once the value falls below 1150. + What: /sys/.../events/in_accel_x_raw_roc_rising_value What: /sys/.../events/in_accel_x_raw_roc_falling_value What: /sys/.../events/in_accel_y_raw_roc_rising_value diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index b7a5d7cbed42..dac15b9f9df8 100644 --- a/drivers/iio/industrialio-event.c +++ b/drivers/iio/industrialio-event.c @@ -204,6 +204,7 @@ static const char * const iio_ev_dir_text[] = { static const char * const iio_ev_info_text[] = { [IIO_EV_INFO_ENABLE] = "en", [IIO_EV_INFO_VALUE] = "value", + [IIO_EV_INFO_HYSTERESIS] = "hysteresis", }; static enum iio_event_direction iio_ev_attr_dir(struct iio_dev_attr *attr) diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index 18339ef4ff5d..4ac928ee31c5 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -65,6 +65,7 @@ enum iio_event_type { enum iio_event_info { IIO_EV_INFO_ENABLE, IIO_EV_INFO_VALUE, + IIO_EV_INFO_HYSTERESIS, }; enum iio_event_direction { |