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| author | Eugen Hristev <eugen.hristev@microchip.com> | 2018-05-22 10:52:32 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2018-06-10 11:55:15 +0100 |
| commit | 3055a6cfa04ba4288589778925e8838261e56078 (patch) | |
| tree | fb0febf4e937104fe330848f552da7e2cff3529a | |
| parent | d22cd4dd6677274df30a38149891524dde8859f3 (diff) | |
| download | linux-0-day-3055a6cfa04ba4288589778925e8838261e56078.tar.gz linux-0-day-3055a6cfa04ba4288589778925e8838261e56078.tar.xz | |
iio: Add channel for Position Relative
Add new channel type for relative position on a pad.
These type of analog sensor offers 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 will hand the relative position on the pad in both directions.
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.hristev@microchip.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 12 | ||||
| -rw-r--r-- | drivers/iio/industrialio-core.c | 1 | ||||
| -rw-r--r-- | include/uapi/linux/iio/types.h | 1 | ||||
| -rw-r--r-- | tools/iio/iio_event_monitor.c | 2 |
4 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 731146c3b1384..c7353030670a7 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -197,6 +197,18 @@ Description: Angle of rotation. Units after application of scale and offset are radians. +What: /sys/bus/iio/devices/iio:deviceX/in_positionrelative_x_raw +What: /sys/bus/iio/devices/iio:deviceX/in_positionrelative_y_raw +KernelVersion: 4.18 +Contact: linux-iio@vger.kernel.org +Description: + Relative 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 milli percents + 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 19bdf3d2962ab..14bf3d243cb12 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_POSITIONRELATIVE] = "positionrelative", }; static const char * const iio_modifier_names[] = { diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h index 4213cdf88e3cd..033c7d28924ee 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_POSITIONRELATIVE, }; enum iio_modifier { diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c index b61245e1181d5..148f69dfae756 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_POSITIONRELATIVE] = "positionrelative", }; 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_POSITIONRELATIVE: break; default: return false; |