Commit 1a8f324a authored by William Breathitt Gray's avatar William Breathitt Gray Committed by Jonathan Cameron

iio: Implement counter channel type and info constants

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: default avatarWilliam Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 9ecca12e
...@@ -329,6 +329,7 @@ What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale ...@@ -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_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_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_illuminance_scale
What: /sys/bus/iio/devices/iio:deviceX/in_countY_scale
KernelVersion: 2.6.35 KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org Contact: linux-iio@vger.kernel.org
Description: Description:
...@@ -1579,3 +1580,20 @@ Contact: linux-iio@vger.kernel.org ...@@ -1579,3 +1580,20 @@ Contact: linux-iio@vger.kernel.org
Description: Description:
Raw (unscaled no offset etc.) electric conductivity reading that Raw (unscaled no offset etc.) electric conductivity reading that
can be processed to siemens per meter. can be processed to siemens per meter.
What: /sys/bus/iio/devices/iio:deviceX/in_countY_raw
KernelVersion: 4.9
Contact: linux-iio@vger.kernel.org
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@vger.kernel.org
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.
...@@ -81,6 +81,8 @@ static const char * const iio_chan_type_name_spec[] = { ...@@ -81,6 +81,8 @@ static const char * const iio_chan_type_name_spec[] = {
[IIO_PH] = "ph", [IIO_PH] = "ph",
[IIO_UVINDEX] = "uvindex", [IIO_UVINDEX] = "uvindex",
[IIO_ELECTRICALCONDUCTIVITY] = "electricalconductivity", [IIO_ELECTRICALCONDUCTIVITY] = "electricalconductivity",
[IIO_COUNT] = "count",
[IIO_INDEX] = "index",
}; };
static const char * const iio_modifier_names[] = { static const char * const iio_modifier_names[] = {
......
...@@ -40,6 +40,8 @@ enum iio_chan_type { ...@@ -40,6 +40,8 @@ enum iio_chan_type {
IIO_PH, IIO_PH,
IIO_UVINDEX, IIO_UVINDEX,
IIO_ELECTRICALCONDUCTIVITY, IIO_ELECTRICALCONDUCTIVITY,
IIO_COUNT,
IIO_INDEX,
}; };
enum iio_modifier { enum iio_modifier {
......
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