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>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
index 1894ab196f97..07e98ec8e9f1 100644
--- a/drivers/iio/light/hid-sensor-prox.c
+++ b/drivers/iio/light/hid-sensor-prox.c
@@ -176,9 +176,8 @@ static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
         struct iio_dev *indio_dev = platform_get_drvdata(priv);
         struct prox_state *prox_state = iio_priv(indio_dev);
 
-        dev_dbg(&indio_dev->dev, "prox_proc_event [%d]\n",
-                                prox_state->common_attributes.data_ready);
-        if (prox_state->common_attributes.data_ready)
+        dev_dbg(&indio_dev->dev, "prox_proc_event\n");
+        if (atomic_read(&prox_state->common_attributes.data_ready))
                 hid_sensor_push_data(indio_dev,
                                 &prox_state->human_presence,
                                 sizeof(prox_state->human_presence));
@@ -297,7 +296,7 @@ static int hid_prox_probe(struct platform_device *pdev)
                 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
                 goto error_free_dev_mem;
         }
-        prox_state->common_attributes.data_ready = false;
+        atomic_set(&prox_state->common_attributes.data_ready, 0);
         ret = hid_sensor_setup_trigger(indio_dev, name,
                                 &prox_state->common_attributes);
         if (ret) {