On 28/09/16 18:59, William Breathitt Gray wrote: > Quadrature encoders, such as rotary encoders and linear encoders, are > devices which are capable of encoding the relative position and > direction of motion of a shaft. This patch introduces several IIO > constants for supporting quadrature encoder counter devices. > > IIO_COUNT: Current count (main data provided by the counter device) > IIO_INDEX: Counter device index value > > Signed-off-by: William Breathitt Gray <[email protected]> Applied
Thanks, > --- > Documentation/ABI/testing/sysfs-bus-iio | 18 ++++++++++++++++++ > drivers/iio/industrialio-core.c | 2 ++ > include/uapi/linux/iio/types.h | 2 ++ > 3 files changed, 22 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio > b/Documentation/ABI/testing/sysfs-bus-iio > index fee35c0..b8f220f 100644 > --- a/Documentation/ABI/testing/sysfs-bus-iio > +++ b/Documentation/ABI/testing/sysfs-bus-iio > @@ -329,6 +329,7 @@ What: > /sys/bus/iio/devices/iio:deviceX/in_pressure_scale > What: > /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale > What: > /sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale > What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_scale > +What: /sys/bus/iio/devices/iio:deviceX/in_countY_scale > KernelVersion: 2.6.35 > Contact: [email protected] > Description: > @@ -1579,3 +1580,20 @@ Contact: [email protected] > Description: > Raw (unscaled no offset etc.) electric conductivity reading that > can be processed to siemens per meter. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_countY_raw > +KernelVersion: 4.9 > +Contact: [email protected] > +Description: > + Raw counter device counts from channel Y. For quadrature > + counters, multiplication by an available [Y]_scale results in > + the counts of a single quadrature signal phase from channel Y. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_indexY_raw > +KernelVersion: 4.9 > +Contact: [email protected] > +Description: > + Raw counter device index value from channel Y. This attribute > + provides an absolute positional reference (e.g. a pulse once per > + revolution) which may be used to home positional systems as > + required. > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c > index fc340ed..649725b 100644 > --- a/drivers/iio/industrialio-core.c > +++ b/drivers/iio/industrialio-core.c > @@ -81,6 +81,8 @@ static const char * const iio_chan_type_name_spec[] = { > [IIO_PH] = "ph", > [IIO_UVINDEX] = "uvindex", > [IIO_ELECTRICALCONDUCTIVITY] = "electricalconductivity", > + [IIO_COUNT] = "count", > + [IIO_INDEX] = "index", > }; > > static const char * const iio_modifier_names[] = { > diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h > index 22e5e58..e54d14a 100644 > --- a/include/uapi/linux/iio/types.h > +++ b/include/uapi/linux/iio/types.h > @@ -40,6 +40,8 @@ enum iio_chan_type { > IIO_PH, > IIO_UVINDEX, > IIO_ELECTRICALCONDUCTIVITY, > + IIO_COUNT, > + IIO_INDEX, > }; > > enum iio_modifier { >
