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 <[email protected]> --- Documentation/ABI/testing/sysfs-bus-iio | 20 ++++++++++++++++---- drivers/iio/industrialio-event.c | 1 + .../staging/iio/Documentation/iio_event_monitor.c | 2 ++ include/linux/iio/types.h | 1 + 4 files changed, 20 insertions(+), 4 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 71dc8db..c03a140 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: [email protected] 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: [email protected] +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 diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index 3f5cee0..08c4a4c 100644 --- a/drivers/iio/industrialio-event.c +++ b/drivers/iio/industrialio-event.c @@ -198,6 +198,7 @@ static const char * const iio_ev_type_text[] = { [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive", [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive", [IIO_EV_TYPE_INSTANCE] = "instance", + [IIO_EV_TYPE_CHANGE] = "change", }; static const char * const iio_ev_dir_text[] = { diff --git a/drivers/staging/iio/Documentation/iio_event_monitor.c b/drivers/staging/iio/Documentation/iio_event_monitor.c index def236a..2e78d58 100644 --- a/drivers/staging/iio/Documentation/iio_event_monitor.c +++ b/drivers/staging/iio/Documentation/iio_event_monitor.c @@ -60,6 +60,7 @@ static const char * const iio_ev_type_text[] = { [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive", [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive", [IIO_EV_TYPE_INSTANCE] = "instance", + [IIO_EV_TYPE_CHANGE] = "change", }; static const char * const iio_ev_dir_text[] = { @@ -179,6 +180,7 @@ static bool event_is_known(struct iio_event_data *event) case IIO_EV_TYPE_THRESH_ADAPTIVE: case IIO_EV_TYPE_MAG_ADAPTIVE: case IIO_EV_TYPE_INSTANCE: + case IIO_EV_TYPE_CHANGE: break; default: return false; diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index c3601c2..3ba3d66 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -79,6 +79,7 @@ enum iio_event_type { IIO_EV_TYPE_THRESH_ADAPTIVE, IIO_EV_TYPE_MAG_ADAPTIVE, IIO_EV_TYPE_INSTANCE, + IIO_EV_TYPE_CHANGE, }; enum iio_event_info { -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
