Add new channel type for position on a pad. These type of analog sensor represents the position of a pen on a touchpad, and is represented as a voltage, which can be converted to a position on X and Y axis on the pad.
The channel can then be consumed by a touchscreen driver or read as-is for a raw indication of the touchpen on a touchpad. Signed-off-by: Eugen Hristev <eugen.hris...@microchip.com> --- Documentation/ABI/testing/sysfs-bus-iio | 11 +++++++++++ drivers/iio/industrialio-core.c | 1 + include/uapi/linux/iio/types.h | 1 + tools/iio/iio_event_monitor.c | 2 ++ 4 files changed, 15 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index a478740..d2b9e2f 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -190,6 +190,17 @@ Description: but should match other such assignments on device). Units after application of scale and offset are m/s^2. +What: /sys/bus/iio/devices/iio:deviceX/in_position_x_raw +What: /sys/bus/iio/devices/iio:deviceX/in_position_y_raw +KernelVersion: 4.16 +Contact: linux-...@vger.kernel.org +Description: + Position in direction x or y on a pad (may be arbitrarily + assigned but should match other such assignments on device). + Units after application of scale and offset are millipercents + from the pad's size in both directions. Should be calibrated by + the consumer. + What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_raw What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 2e8e36f..a4fa49b 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -85,6 +85,7 @@ static const char * const iio_chan_type_name_spec[] = { [IIO_COUNT] = "count", [IIO_INDEX] = "index", [IIO_GRAVITY] = "gravity", + [IIO_POSITION] = "position", }; static const char * const iio_modifier_names[] = { diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h index 4213cdf..35e17da 100644 --- a/include/uapi/linux/iio/types.h +++ b/include/uapi/linux/iio/types.h @@ -44,6 +44,7 @@ enum iio_chan_type { IIO_COUNT, IIO_INDEX, IIO_GRAVITY, + IIO_POSITION, }; enum iio_modifier { diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c index b61245e..0c2b317 100644 --- a/tools/iio/iio_event_monitor.c +++ b/tools/iio/iio_event_monitor.c @@ -58,6 +58,7 @@ static const char * const iio_chan_type_name_spec[] = { [IIO_PH] = "ph", [IIO_UVINDEX] = "uvindex", [IIO_GRAVITY] = "gravity", + [IIO_POSITION] = "position", }; 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_POSITION: break; default: return false; -- 2.7.4