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Commit 371a1233 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Jonathan Cameron
Browse files

iio: hid-sensors: ALS: 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: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 0964f706

drivers/iio/light/hid-sensor-als.c

+19 −5
Original line number Diff line number Diff line
@@ -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 {

			hid_sensor_power_state(&als_state->common_attributes,

						false);

		} else {

			*val = 0;

			return -EINVAL;

		}