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iio: hid-sensors: ALS: Raw read support

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Added support for raw reading of channel. If the sensor is powered
off, it will turn on for reading value.

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 0964f706dc
commit 371a12339a
1 changed files with 19 additions and 5 deletions
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24
drivers/iio/light/hid-sensor-als.c
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@ -22,6 +22,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/hid-sensor-hub.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@ -49,6 +50,7 @@ static const struct iio_chan_spec als_channels[] = {
.type = IIO_INTENSITY,
.modified = 1,
.channel2 = IIO_MOD_LIGHT_BOTH,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
@ -79,6 +81,7 @@ static int als_read_raw(struct iio_dev *indio_dev,
u32 address;
int ret;
int ret_type;
s32 poll_value;
*val = 0;
*val2 = 0;
@ -94,12 +97,23 @@ static int als_read_raw(struct iio_dev *indio_dev,
report_id = -1;
break;
}
if (report_id >= 0)
if (report_id >= 0) {
poll_value = hid_sensor_read_poll_value(
&als_state->common_attributes);
if (poll_value < 0)
return -EINVAL;
hid_sensor_power_state(&als_state->common_attributes,
true);
msleep_interruptible(poll_value * 2);
*val = sensor_hub_input_attr_get_raw_value(
als_state->common_attributes.hsdev,
HID_USAGE_SENSOR_ALS, address,
report_id);
else {
als_state->common_attributes.hsdev,
HID_USAGE_SENSOR_ALS, address,
report_id);
hid_sensor_power_state(&als_state->common_attributes,
false);
} else {
*val = 0;
return -EINVAL;
}