iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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>
This commit is contained in:
Srinivas Pandruvada
2014-04-19 00:22:00 +01:00
committed by Jonathan Cameron
parent a269b9a0a2
commit 56ff6be608
11 changed files with 39 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/iio/common/hid-sensors/hid-sensor-trigger.c
View File

@ -28,16 +28,17 @@
#include <linux/iio/sysfs.h>
#include "hid-sensor-trigger.h"
static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
bool state)
int hid_sensor_power_state(struct hid_sensor_common *st, bool state)
{
struct hid_sensor_common *st = iio_trigger_get_drvdata(trig);
int state_val;
int report_val;
if (state) {
if (sensor_hub_device_open(st->hsdev))
return -EIO;
atomic_inc(&st->data_ready);
state_val = hid_sensor_get_usage_index(st->hsdev,
st->power_state.report_id,
st->power_state.index,
@ -47,6 +48,8 @@ static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
st->report_state.index,
HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM);
} else {
if (!atomic_dec_and_test(&st->data_ready))
return 0;
sensor_hub_device_close(st->hsdev);
state_val = hid_sensor_get_usage_index(st->hsdev,
st->power_state.report_id,
@ -57,7 +60,6 @@ static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
st->report_state.index,
HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM);
}
st->data_ready = state;
if (state_val >= 0) {
state_val += st->power_state.logical_minimum;
@ -75,6 +77,13 @@ static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
return 0;
}
EXPORT_SYMBOL(hid_sensor_power_state);
static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
bool state)
{
return hid_sensor_power_state(iio_trigger_get_drvdata(trig), state);
}
void hid_sensor_remove_trigger(struct hid_sensor_common *attrb)
{

1
drivers/iio/common/hid-sensors/hid-sensor-trigger.h
View File

@ -22,5 +22,6 @@
int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
struct hid_sensor_common *attrb);
void hid_sensor_remove_trigger(struct hid_sensor_common *attrb);
int hid_sensor_power_state(struct hid_sensor_common *st, bool state);
#endif