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[2/3] IIO: call sensor hub open close function

Message ID 1378843432-5113-2-git-send-email-srinivas.pandruvada@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

srinivas pandruvada Sept. 10, 2013, 8:03 p.m. UTC 
Call hid_sensor_hub_device_open when user space opens device and call
hid_sensor_hub_device_close when device is closed. This helps in
saving power.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 drivers/iio/common/hid-sensors/hid-sensor-trigger.c | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index 87419c4..b6e77e0 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -34,6 +34,12 @@  static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
 	struct hid_sensor_common *st = iio_trigger_get_drvdata(trig);
 	int state_val;
 
+	if (state) {
+		if (sensor_hub_device_open(st->hsdev))
+			return -EIO;
+	} else
+		sensor_hub_device_close(st->hsdev);
+
 	state_val = state ? 1 : 0;
 	if (IS_ENABLED(CONFIG_HID_SENSOR_ENUM_BASE_QUIRKS))
 		++state_val;