Re: [PATCH 14/16] iio: hid-sensors: Compass 3D: Raw read support

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On 19/04/14 00:22, Srinivas Pandruvada wrote:
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@xxxxxxxxxxxxxxx>
Applied to the togreg branch of iio.git

Thanks,
---
  drivers/iio/magnetometer/hid-sensor-magn-3d.c | 16 ++++++++++++++++
  1 file changed, 16 insertions(+)

diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
index 54eea6a..41cf29e 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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