> Add new channel types support for linear accel sensor. > > Linear acceleration differs from a standard accelerometor, > its value depends on standard accel sensor and gravity sensor. > Conceptually, this three sensors have following relationship: > linear acceleration = acceleration - acceleration due to gravity > > At rest, standard accelerometer displays 1g due to earth’s > gravitational pull while a liner accelerometer will show 0g. comment below > More information can be found in: > http://www.usb.org/developers/hidpage/HUTRR59_-_Usages_for_Wearables.pdf > > Signed-off-by: Song Hongyan <hongyan.song@xxxxxxxxx> > --- > Documentation/ABI/testing/sysfs-bus-iio | 10 ++++++++++ > drivers/iio/industrialio-core.c | 1 + > include/uapi/linux/iio/types.h | 1 + > tools/iio/iio_event_monitor.c | 2 ++ > 4 files changed, 14 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio > index 60b7406..8091f3d 100644 > --- a/Documentation/ABI/testing/sysfs-bus-iio > +++ b/Documentation/ABI/testing/sysfs-bus-iio > @@ -170,6 +170,16 @@ Description: > Has all of the equivalent parameters as per voltageY. Units > after application of scale and offset are m/s^2. > > +What: /sys/bus/iio/devices/iio:deviceX/in_linear_accel_x_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_linear_accel_y_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_linear_accel_z_raw I think this would be in_linearaccel_x_raw, etc.? > +KernelVersion: 4.11 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Linear Acceleration in direction x, y or z (may be arbitrarily assigned > + but should match other such assignments on device). > + Has all of the equivalent parameters as per voltageY. Units > + after application of scale and offset are m/s^2. > > What: /sys/bus/iio/devices/iio:deviceX/in_gravity_x_raw > What: /sys/bus/iio/devices/iio:deviceX/in_gravity_y_raw > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c > index 72fc96a..da78c26 100644 > --- a/drivers/iio/industrialio-core.c > +++ b/drivers/iio/industrialio-core.c > @@ -82,6 +82,7 @@ struct bus_type iio_bus_type = { > [IIO_UVINDEX] = "uvindex", > [IIO_ELECTRICALCONDUCTIVITY] = "electricalconductivity", > [IIO_GRAVITY] = "gravity", > + [IIO_LINEAR_ACCEL] = "linearaccel", > }; > > static const char * const iio_modifier_names[] = { > diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h > index d3f7ba7..d6df101 100644 > --- a/include/uapi/linux/iio/types.h > +++ b/include/uapi/linux/iio/types.h > @@ -41,6 +41,7 @@ enum iio_chan_type { > IIO_UVINDEX, > IIO_ELECTRICALCONDUCTIVITY, > IIO_GRAVITY, > + IIO_LINEAR_ACCEL, > }; > > enum iio_modifier { > diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c > index b61245e..116644a 100644 > --- a/tools/iio/iio_event_monitor.c > +++ b/tools/iio/iio_event_monitor.c > @@ -58,6 +58,7 @@ > [IIO_PH] = "ph", > [IIO_UVINDEX] = "uvindex", > [IIO_GRAVITY] = "gravity", > + [IIO_LINEAR_ACCEL] = "linearaccel", > }; > > static const char * const iio_ev_type_text[] = { > @@ -151,6 +152,7 @@ static bool event_is_known(struct iio_event_data *event) > case IIO_PH: > case IIO_UVINDEX: > case IIO_GRAVITY: > + case IIO_LINEAR_ACCEL: > break; > default: > return false; > -- Peter Meerwald-Stadler +43-664-2444418 (mobile)
