[PATCH v5 09/10] iio: Add channel for tap and new modifiers for single and double tap

[Jagath Jog J]

Add new channel type for tap and also add new modifiers for single and
double tap. This channel and modifiers may be used by accelerometer
sensors to express single and double tap events. For directional tap,
modifiers like IIO_MOD_(X/Y/Z) can be used along with rising and
falling direction.

Signed-off-by: Jagath Jog J <jagathjog1996@xxxxxxxxx>
---
 Documentation/ABI/testing/sysfs-bus-iio | 11 +++++++++++
 drivers/iio/industrialio-core.c         |  3 +++
 include/uapi/linux/iio/types.h          |  3 +++
 tools/iio/iio_event_monitor.c           |  6 ++++++
 4 files changed, 23 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index d4ccc68fdcf0..bf2d10d6ad9b 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -2030,3 +2030,14 @@ Description:
 		Available range for the forced calibration value, expressed as:
 
 		- a range specified as "[min step max]"
+
+What:		/sys/.../events/in_tap_single_change_en
+What:		/sys/.../events/in_tap_double_change_en
+KernelVersion:	5.19
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Accelerometer device detects single or double taps and generate
+		events when threshold for minimum tap amplitide passes.
+		E.g. a single tap event is generated when acceleration value
+		crosses the minimum tap amplitude value set. Where tap threshold
+		value is set by using in_tap_change_value.
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index e1ed44dec2ab..9b0d7bbd07fc 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -87,6 +87,7 @@ static const char * const iio_chan_type_name_spec[] = {
 	[IIO_POSITIONRELATIVE]  = "positionrelative",
 	[IIO_PHASE] = "phase",
 	[IIO_MASSCONCENTRATION] = "massconcentration",
+	[IIO_TAP] = "tap"
 };
 
 static const char * const iio_modifier_names[] = {
@@ -134,6 +135,8 @@ static const char * const iio_modifier_names[] = {
 	[IIO_MOD_ETHANOL] = "ethanol",
 	[IIO_MOD_H2] = "h2",
 	[IIO_MOD_O2] = "o2",
+	[IIO_MOD_TAP_SINGLE] = "single",
+	[IIO_MOD_TAP_DOUBLE] = "double",
 };
 
 /* relies on pairs of these shared then separate */
diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
index 472cead10d8d..d1e61c84e0d5 100644
--- a/include/uapi/linux/iio/types.h
+++ b/include/uapi/linux/iio/types.h
@@ -47,6 +47,7 @@ enum iio_chan_type {
 	IIO_POSITIONRELATIVE,
 	IIO_PHASE,
 	IIO_MASSCONCENTRATION,
+	IIO_TAP,
 };
 
 enum iio_modifier {
@@ -95,6 +96,8 @@ enum iio_modifier {
 	IIO_MOD_ETHANOL,
 	IIO_MOD_H2,
 	IIO_MOD_O2,
+	IIO_MOD_TAP_SINGLE,
+	IIO_MOD_TAP_DOUBLE,
 };
 
 enum iio_event_type {
diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
index 2f4581658859..7fa7d4285f40 100644
--- a/tools/iio/iio_event_monitor.c
+++ b/tools/iio/iio_event_monitor.c
@@ -59,6 +59,7 @@ static const char * const iio_chan_type_name_spec[] = {
 	[IIO_POSITIONRELATIVE] = "positionrelative",
 	[IIO_PHASE] = "phase",
 	[IIO_MASSCONCENTRATION] = "massconcentration",
+	[IIO_TAP] = "tap",
 };
 
 static const char * const iio_ev_type_text[] = {
@@ -122,6 +123,8 @@ static const char * const iio_modifier_names[] = {
 	[IIO_MOD_PM4] = "pm4",
 	[IIO_MOD_PM10] = "pm10",
 	[IIO_MOD_O2] = "o2",
+	[IIO_MOD_TAP_SINGLE] = "single",
+	[IIO_MOD_TAP_DOUBLE] = "double",
 };
 
 static bool event_is_known(struct iio_event_data *event)
@@ -164,6 +167,7 @@ static bool event_is_known(struct iio_event_data *event)
 	case IIO_POSITIONRELATIVE:
 	case IIO_PHASE:
 	case IIO_MASSCONCENTRATION:
+	case IIO_TAP:
 		break;
 	default:
 		return false;
@@ -215,6 +219,8 @@ static bool event_is_known(struct iio_event_data *event)
 	case IIO_MOD_PM4:
 	case IIO_MOD_PM10:
 	case IIO_MOD_O2:
+	case IIO_MOD_TAP_SINGLE:
+	case IIO_MOD_TAP_DOUBLE:
 		break;
 	default:
 		return false;
-- 
2.17.1