iio: hid-sensors: Inclinometer 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>

diff --git a/drivers/iio/orientation/hid-sensor-incl-3d.c b/drivers/iio/orientation/hid-sensor-incl-3d.c
index bf11678..2478f6c 100644 (file)
--- a/drivers/iio/orientation/hid-sensor-incl-3d.c
+++ b/drivers/iio/orientation/hid-sensor-incl-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>
@@ -110,11 +111,20 @@ static int incl_3d_read_raw(struct iio_dev *indio_dev,
        int report_id = -1;
        u32 address;
        int ret_type;
+       s32 poll_value;
 
        *val = 0;
        *val2 = 0;
        switch (mask) {
        case IIO_CHAN_INFO_RAW:
+               poll_value = hid_sensor_read_poll_value(
+                                       &incl_state->common_attributes);
+               if (poll_value < 0)
+                       return -EINVAL;
+
+               hid_sensor_power_state(&incl_state->common_attributes, true);
+               msleep_interruptible(poll_value * 2);
+
                report_id =
                        incl_state->incl[chan->scan_index].report_id;
                address = incl_3d_addresses[chan->scan_index];
@@ -124,8 +134,11 @@ static int incl_3d_read_raw(struct iio_dev *indio_dev,
                                HID_USAGE_SENSOR_INCLINOMETER_3D, address,
                                report_id);
                else {
+                       hid_sensor_power_state(&incl_state->common_attributes,
+                                               false);
                        return -EINVAL;
                }
+               hid_sensor_power_state(&incl_state->common_attributes, false);
                ret_type = IIO_VAL_INT;
                break;
        case IIO_CHAN_INFO_SCALE: