iio: Add channel for Gravity

Add new channel types support for gravity sensor.

Gravity sensor provides an application-level or physical collection that
identifies a device that measures exclusively the force of Earth's
gravity along any number of axes.

More information can be found in:
http://www.usb.org/developers/hidpage/HUTRR59_-_Usages_for_Wearables.pdf

Signed-off-by: Song Hongyan <hongyan.song@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index cfd53dba24c40aa9bf75c6fcf76b0be33c6eee41..8ec362bd5948bf57a4732b3738246dfc24378e88 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -170,6 +170,16 @@ Description:
                Has all of the equivalent parameters as per voltageY. Units
                after application of scale and offset are m/s^2.
 
+What:          /sys/bus/iio/devices/iio:deviceX/in_gravity_x_raw
+What:          /sys/bus/iio/devices/iio:deviceX/in_gravity_y_raw
+What:          /sys/bus/iio/devices/iio:deviceX/in_gravity_z_raw
+KernelVersion: 4.11
+Contact:       linux-iio@vger.kernel.org
+Description:
+               Gravity in direction x, y or z (may be arbitrarily assigned
+               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_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 aaca42862389b9e675807437b1231760bfb3a859..c601698e0910d87cf6b402a3ce1a1c6070c1af86 100644 (file)
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -83,6 +83,7 @@ static const char * const iio_chan_type_name_spec[] = {
        [IIO_ELECTRICALCONDUCTIVITY] = "electricalconductivity",
        [IIO_COUNT] = "count",
        [IIO_INDEX] = "index",
+       [IIO_GRAVITY]  = "gravity",
 };
 
 static const char * const iio_modifier_names[] = {

diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
index e54d14a7f876b08c8ff5bd370143d85a89c02ff5..ffafd6c25a48cf61774606a55e4654fb34153eec 100644 (file)
--- a/include/uapi/linux/iio/types.h
+++ b/include/uapi/linux/iio/types.h
@@ -42,6 +42,7 @@ enum iio_chan_type {
        IIO_ELECTRICALCONDUCTIVITY,
        IIO_COUNT,
        IIO_INDEX,
+       IIO_GRAVITY,
 };
 
 enum iio_modifier {

diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
index d9b7e0f306c6d196aea28162285e52c39848596c..b61245e1181d5ffc228e080bb8382b1a95851aae 100644 (file)
--- a/tools/iio/iio_event_monitor.c
+++ b/tools/iio/iio_event_monitor.c
@@ -57,6 +57,7 @@ static const char * const iio_chan_type_name_spec[] = {
        [IIO_RESISTANCE] = "resistance",
        [IIO_PH] = "ph",
        [IIO_UVINDEX] = "uvindex",
+       [IIO_GRAVITY] = "gravity",
 };
 
 static const char * const iio_ev_type_text[] = {
@@ -149,6 +150,7 @@ static bool event_is_known(struct iio_event_data *event)
        case IIO_RESISTANCE:
        case IIO_PH:
        case IIO_UVINDEX:
+       case IIO_GRAVITY:
                break;
        default:
                return false;