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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2014-04-19 00:22:00 +0100
committerJonathan Cameron <jic23@kernel.org>2014-05-05 10:59:52 +0100
commit8009c594a5b523444a18cfb65211d38a5e459a8a (patch)
tree702a358c838a77036817df86712f4184b9a67482 /drivers/iio
parent1eef062042751822e9f9de418b0f712c6f9b93e8 (diff)
downloadblackbird-op-linux-8009c594a5b523444a18cfb65211d38a5e459a8a.tar.gz
blackbird-op-linux-8009c594a5b523444a18cfb65211d38a5e459a8a.zip
iio: hid-sensors: Compass 3D: Raw read support
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>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/magnetometer/hid-sensor-magn-3d.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
index 54eea6a17061..41cf29e2a371 100644
--- a/drivers/iio/magnetometer/hid-sensor-magn-3d.c
+++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
@@ -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:
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