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 <vilhelm.gray@xxxxxxxxx>
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: linux-iio@xxxxxxxxxxxxxxx
> Description:
> @@ -1579,3 +1580,20 @@ Contact: linux-iio@xxxxxxxxxxxxxxx
> 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: linux-iio@xxxxxxxxxxxxxxx
> +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: linux-iio@xxxxxxxxxxxxxxx
> +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 {
>
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