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Commit c73314e6 authored by Mathieu Othacehe's avatar Mathieu Othacehe Committed by Jonathan Cameron
Browse files

iio: Add channel for Phase 



Add new channel type support for phase.

This channel may be used by Time-of-flight sensors to express the
phase difference between emitted and received signals. Those sensor
will then use the phase shift of return signals to approximate the
distance to objects.

Signed-off-by: default avatarMathieu Othacehe <m.othacehe@gmail.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent cd570e6f

Documentation/ABI/testing/sysfs-bus-iio

+7 −0
Original line number Diff line number Diff line
@@ -1675,3 +1675,10 @@ KernelVersion: 4.12 
Contact:	linux-iio@vger.kernel.org

Description:

		Raw counter device counters direction for channel Y.



What:		/sys/bus/iio/devices/iio:deviceX/in_phaseY_raw

KernelVersion:	4.18

Contact:	linux-iio@vger.kernel.org

Description:

		Raw (unscaled) phase difference reading from channel Y

		that can be processed to radians.
 
 No newline at end of file

drivers/iio/industrialio-core.c

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ static const char * const iio_chan_type_name_spec[] = { 
	[IIO_INDEX] = "index",

	[IIO_GRAVITY]  = "gravity",

	[IIO_POSITIONRELATIVE]  = "positionrelative",

	[IIO_PHASE] = "phase",

};



static const char * const iio_modifier_names[] = {

include/uapi/linux/iio/types.h

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ enum iio_chan_type { 
	IIO_INDEX,

	IIO_GRAVITY,

	IIO_POSITIONRELATIVE,

	IIO_PHASE,

};



enum iio_modifier {

tools/iio/iio_event_monitor.c

+2 −0
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ static const char * const iio_chan_type_name_spec[] = { 
	[IIO_UVINDEX] = "uvindex",

	[IIO_GRAVITY] = "gravity",

	[IIO_POSITIONRELATIVE] = "positionrelative",

	[IIO_PHASE] = "phase",

};



static const char * const iio_ev_type_text[] = {
@@ -153,6 +154,7 @@ static bool event_is_known(struct iio_event_data *event) 
	case IIO_UVINDEX:

	case IIO_GRAVITY:

	case IIO_POSITIONRELATIVE:

	case IIO_PHASE:

		break;

	default:

		return false;