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iio: hid-sensors: Compass 3D: 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 1eef062042
commit 8009c594a5
1 changed files with 16 additions and 0 deletions
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16
drivers/iio/magnetometer/hid-sensor-magn-3d.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>
@ -60,6 +61,7 @@ static const struct iio_chan_spec magn_3d_channels[] = {
.type = IIO_MAGN,
.modified = 1,
.channel2 = IIO_MOD_X,
.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) |
@ -69,6 +71,7 @@ static const struct iio_chan_spec magn_3d_channels[] = {
.type = IIO_MAGN,
.modified = 1,
.channel2 = IIO_MOD_Y,
.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) |
@ -78,6 +81,7 @@ static const struct iio_chan_spec magn_3d_channels[] = {
.type = IIO_MAGN,
.modified = 1,
.channel2 = IIO_MOD_Z,
.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) |
@ -108,11 +112,20 @@ static int magn_3d_read_raw(struct iio_dev *indio_dev,
u32 address;
int ret;
int ret_type;
s32 poll_value;
*val = 0;
*val2 = 0;
switch (mask) {
case 0:
poll_value = hid_sensor_read_poll_value(
&magn_state->common_attributes);
if (poll_value < 0)
return -EINVAL;
hid_sensor_power_state(&magn_state->common_attributes, true);
msleep_interruptible(poll_value * 2);
report_id =
magn_state->magn[chan->scan_index].report_id;
address = magn_3d_addresses[chan->scan_index];
@ -123,8 +136,11 @@ static int magn_3d_read_raw(struct iio_dev *indio_dev,
report_id);
else {
*val = 0;
hid_sensor_power_state(&magn_state->common_attributes,
false);
return -EINVAL;
}
hid_sensor_power_state(&magn_state->common_attributes, false);
ret_type = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SCALE: