iio: hid-sensors: Add API to power on/off

Added an API to allow client drivers to turn ON and OFF sensors for
quick read. Added data_read as counting varaible instead of boolean,
so that sensor is powered off only when last user released it.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

2 files changed, 6 insertions, 9 deletions

diff --git a/drivers/iio/orientation/hid-sensor-incl-3d.c b/drivers/iio/orientation/hid-sensor-incl-3d.c
index f0c465cc192a..bf11678dd04e 100644
--- a/drivers/iio/orientation/hid-sensor-incl-3d.c
+++ b/drivers/iio/orientation/hid-sensor-incl-3d.c
@@ -200,9 +200,8 @@ static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
         struct iio_dev *indio_dev = platform_get_drvdata(priv);
         struct incl_3d_state *incl_state = iio_priv(indio_dev);
 
-        dev_dbg(&indio_dev->dev, "incl_3d_proc_event [%d]\n",
-                                incl_state->common_attributes.data_ready);
-        if (incl_state->common_attributes.data_ready)
+        dev_dbg(&indio_dev->dev, "incl_3d_proc_event\n");
+        if (atomic_read(&incl_state->common_attributes.data_ready))
                 hid_sensor_push_data(indio_dev,
                                 (u8 *)incl_state->incl_val,
                                 sizeof(incl_state->incl_val));
@@ -358,7 +357,7 @@ static int hid_incl_3d_probe(struct platform_device *pdev)
                 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
                 goto error_free_dev_mem;
         }
-        incl_state->common_attributes.data_ready = false;
+        atomic_set(&incl_state->common_attributes.data_ready, 0);
         ret = hid_sensor_setup_trigger(indio_dev, name,
                                         &incl_state->common_attributes);
         if (ret) {
diff --git a/drivers/iio/orientation/hid-sensor-rotation.c b/drivers/iio/orientation/hid-sensor-rotation.c
index 51387bbc1ce1..dccf848e8b0f 100644
--- a/drivers/iio/orientation/hid-sensor-rotation.c
+++ b/drivers/iio/orientation/hid-sensor-rotation.c
@@ -145,10 +145,8 @@ static int dev_rot_proc_event(struct hid_sensor_hub_device *hsdev,
         struct iio_dev *indio_dev = platform_get_drvdata(priv);
         struct dev_rot_state *rot_state = iio_priv(indio_dev);
 
-        dev_dbg(&indio_dev->dev, "dev_rot_proc_event [%d]\n",
-                                rot_state->common_attributes.data_ready);
-
-        if (rot_state->common_attributes.data_ready)
+        dev_dbg(&indio_dev->dev, "dev_rot_proc_event\n");
+        if (atomic_read(&rot_state->common_attributes.data_ready))
                 hid_sensor_push_data(indio_dev,
                                 (u8 *)rot_state->sampled_vals,
                                 sizeof(rot_state->sampled_vals));
@@ -272,7 +270,7 @@ static int hid_dev_rot_probe(struct platform_device *pdev)
                 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
                 return ret;
         }
-        rot_state->common_attributes.data_ready = false;
+        atomic_set(&rot_state->common_attributes.data_ready, 0);
         ret = hid_sensor_setup_trigger(indio_dev, name,
                                         &rot_state->common_attributes);
         if (ret) {