diff options
| author | Irina Tirdea <irina.tirdea@intel.com> | 2015-01-11 21:10:11 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-01-27 18:49:55 +0000 |
| commit | 27be84236d75c13a83c45d850390f40b58401d97 (patch) | |
| tree | ad80b4543ccd8e386dcc23662375330a55192990 /Documentation/ABI/testing/sysfs-bus-iio | |
| parent | d37f6836fa285882450e28d1cbc5a9b624911e7e (diff) | |
iio: core: Introduce CHANGE event type
A step detector will generate an interrupt each time N step are detected.
A device that has such pedometer functionality is Freescale's MMA9553L:
http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf.
Introduce IIO_EV_TYPE_CHANGE event type for events that are generated
when the channel passes a threshold on the absolute change in value.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-iio')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 71dc8db4388b..c03a1401b9ca 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -891,12 +891,24 @@ Description: number or direction is not specified, applies to all channels of this type. -What: /sys/.../events/in_steps_instance_en -KernelVersion: 3.19 +What: /sys/.../events/in_steps_change_en +KernelVersion: 3.20 Contact: linux-iio@vger.kernel.org Description: - Enables or disables step detection. Each time the user takes a step an - event of this type will be generated. + Event generated when channel passes a threshold on the absolute + change in value. E.g. for steps: a step change event is + generated each time the user takes N steps, where N is set using + in_steps_change_value. + +What: /sys/.../events/in_steps_change_value +KernelVersion: 3.20 +Contact: linux-iio@vger.kernel.org +Description: + Specifies the value of change threshold that the + device is comparing against for the events enabled by + <type>[Y][_name]_roc[_rising|falling|]_en. E.g. for steps: + if set to 3, a step change event will be generated every 3 + steps. What: /sys/bus/iio/devices/iio:deviceX/trigger/current_trigger KernelVersion: 2.6.35 |