[deliverable/linux.git] / drivers / iio / light / hid-sensor-prox.c

/*
 * HID Sensors Driver
 * Copyright (c) 2014, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.
 *
 */
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#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>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include "../common/hid-sensors/hid-sensor-trigger.h"

#define CHANNEL_SCAN_INDEX_PRESENCE 0

struct prox_state {
	struct hid_sensor_hub_callbacks callbacks;
	struct hid_sensor_common common_attributes;
	struct hid_sensor_hub_attribute_info prox_attr;
	u32 human_presence;
};

/* Channel definitions */
static const struct iio_chan_spec prox_channels[] = {
	{
		.type = IIO_PROXIMITY,
		.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) |
		BIT(IIO_CHAN_INFO_HYSTERESIS),
		.scan_index = CHANNEL_SCAN_INDEX_PRESENCE,
	}
};

/* Adjust channel real bits based on report descriptor */
static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
					int channel, int size)
{
	channels[channel].scan_type.sign = 's';
	/* Real storage bits will change based on the report desc. */
	channels[channel].scan_type.realbits = size * 8;
	/* Maximum size of a sample to capture is u32 */
	channels[channel].scan_type.storagebits = sizeof(u32) * 8;
}

/* Channel read_raw handler */
static int prox_read_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan,
			      int *val, int *val2,
			      long mask)
{
	struct prox_state *prox_state = iio_priv(indio_dev);
	int report_id = -1;
	u32 address;
	int ret_type;

	*val = 0;
	*val2 = 0;
	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		switch (chan->scan_index) {
		case  CHANNEL_SCAN_INDEX_PRESENCE:
			report_id = prox_state->prox_attr.report_id;
			address =
			HID_USAGE_SENSOR_HUMAN_PRESENCE;
			break;
		default:
			report_id = -1;
			break;
		}
		if (report_id >= 0) {
			hid_sensor_power_state(&prox_state->common_attributes,
						true);
			*val = sensor_hub_input_attr_get_raw_value(
				prox_state->common_attributes.hsdev,
				HID_USAGE_SENSOR_PROX, address,
				report_id,
				SENSOR_HUB_SYNC);
			hid_sensor_power_state(&prox_state->common_attributes,
						false);
		} else {
			*val = 0;
			return -EINVAL;
		}
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SCALE:
		*val = prox_state->prox_attr.units;
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_OFFSET:
		*val = hid_sensor_convert_exponent(
				prox_state->prox_attr.unit_expo);
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SAMP_FREQ:
		ret_type = hid_sensor_read_samp_freq_value(
				&prox_state->common_attributes, val, val2);
		break;
	case IIO_CHAN_INFO_HYSTERESIS:
		ret_type = hid_sensor_read_raw_hyst_value(
				&prox_state->common_attributes, val, val2);
		break;
	default:
		ret_type = -EINVAL;
		break;
	}

	return ret_type;
}

/* Channel write_raw handler */
static int prox_write_raw(struct iio_dev *indio_dev,
			       struct iio_chan_spec const *chan,
			       int val,
			       int val2,
			       long mask)
{
	struct prox_state *prox_state = iio_priv(indio_dev);
	int ret = 0;

	switch (mask) {
	case IIO_CHAN_INFO_SAMP_FREQ:
		ret = hid_sensor_write_samp_freq_value(
				&prox_state->common_attributes, val, val2);
		break;
	case IIO_CHAN_INFO_HYSTERESIS:
		ret = hid_sensor_write_raw_hyst_value(
				&prox_state->common_attributes, val, val2);
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

static const struct iio_info prox_info = {
	.driver_module = THIS_MODULE,
	.read_raw = &prox_read_raw,
	.write_raw = &prox_write_raw,
};

/* Function to push data to buffer */
static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
					int len)
{
	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
	iio_push_to_buffers(indio_dev, data);
}

/* Callback handler to send event after all samples are received and captured */
static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
				unsigned usage_id,
				void *priv)
{
	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	struct prox_state *prox_state = iio_priv(indio_dev);

	dev_dbg(&indio_dev->dev, "prox_proc_event\n");
	if (atomic_read(&prox_state->common_attributes.data_ready))
		hid_sensor_push_data(indio_dev,
				&prox_state->human_presence,
				sizeof(prox_state->human_presence));

	return 0;
}

/* Capture samples in local storage */
static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
				unsigned usage_id,
				size_t raw_len, char *raw_data,
				void *priv)
{
	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	struct prox_state *prox_state = iio_priv(indio_dev);
	int ret = -EINVAL;

	switch (usage_id) {
	case HID_USAGE_SENSOR_HUMAN_PRESENCE:
		prox_state->human_presence = *(u32 *)raw_data;
		ret = 0;
		break;
	default:
		break;
	}

	return ret;
}

/* Parse report which is specific to an usage id*/
static int prox_parse_report(struct platform_device *pdev,
				struct hid_sensor_hub_device *hsdev,
				struct iio_chan_spec *channels,
				unsigned usage_id,
				struct prox_state *st)
{
	int ret;

	ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
			usage_id,
			HID_USAGE_SENSOR_HUMAN_PRESENCE,
			&st->prox_attr);
	if (ret < 0)
		return ret;
	prox_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_PRESENCE,
					st->prox_attr.size);

	dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
			st->prox_attr.report_id);

	/* Set Sensitivity field ids, when there is no individual modifier */
	if (st->common_attributes.sensitivity.index < 0) {
		sensor_hub_input_get_attribute_info(hsdev,
			HID_FEATURE_REPORT, usage_id,
			HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
			HID_USAGE_SENSOR_DATA_PRESENCE,
			&st->common_attributes.sensitivity);
		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
			st->common_attributes.sensitivity.index,
			st->common_attributes.sensitivity.report_id);
	}
	return ret;
}

/* Function to initialize the processing for usage id */
static int hid_prox_probe(struct platform_device *pdev)
{
	int ret = 0;
	static const char *name = "prox";
	struct iio_dev *indio_dev;
	struct prox_state *prox_state;
	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;

	indio_dev = devm_iio_device_alloc(&pdev->dev,
				sizeof(struct prox_state));
	if (!indio_dev)
		return -ENOMEM;
	platform_set_drvdata(pdev, indio_dev);

	prox_state = iio_priv(indio_dev);
	prox_state->common_attributes.hsdev = hsdev;
	prox_state->common_attributes.pdev = pdev;

	ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_PROX,
					&prox_state->common_attributes);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup common attributes\n");
		return ret;
	}

	indio_dev->channels = kmemdup(prox_channels, sizeof(prox_channels),
				      GFP_KERNEL);
	if (!indio_dev->channels) {
		dev_err(&pdev->dev, "failed to duplicate channels\n");
		return -ENOMEM;
	}

	ret = prox_parse_report(pdev, hsdev,
				(struct iio_chan_spec *)indio_dev->channels,
				HID_USAGE_SENSOR_PROX, prox_state);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup attributes\n");
		goto error_free_dev_mem;
	}

	indio_dev->num_channels = ARRAY_SIZE(prox_channels);
	indio_dev->dev.parent = &pdev->dev;
	indio_dev->info = &prox_info;
	indio_dev->name = name;
	indio_dev->modes = INDIO_DIRECT_MODE;

	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
		NULL, NULL);
	if (ret) {
		dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
		goto error_free_dev_mem;
	}
	atomic_set(&prox_state->common_attributes.data_ready, 0);
	ret = hid_sensor_setup_trigger(indio_dev, name,
				&prox_state->common_attributes);
	if (ret) {
		dev_err(&pdev->dev, "trigger setup failed\n");
		goto error_unreg_buffer_funcs;
	}

	ret = iio_device_register(indio_dev);
	if (ret) {
		dev_err(&pdev->dev, "device register failed\n");
		goto error_remove_trigger;
	}

	prox_state->callbacks.send_event = prox_proc_event;
	prox_state->callbacks.capture_sample = prox_capture_sample;
	prox_state->callbacks.pdev = pdev;
	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_PROX,
					&prox_state->callbacks);
	if (ret < 0) {
		dev_err(&pdev->dev, "callback reg failed\n");
		goto error_iio_unreg;
	}

	return ret;

error_iio_unreg:
	iio_device_unregister(indio_dev);
error_remove_trigger:
	hid_sensor_remove_trigger(&prox_state->common_attributes);
error_unreg_buffer_funcs:
	iio_triggered_buffer_cleanup(indio_dev);
error_free_dev_mem:
	kfree(indio_dev->channels);
	return ret;
}

/* Function to deinitialize the processing for usage id */
static int hid_prox_remove(struct platform_device *pdev)
{
	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
	struct prox_state *prox_state = iio_priv(indio_dev);

	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
	iio_device_unregister(indio_dev);
	hid_sensor_remove_trigger(&prox_state->common_attributes);
	iio_triggered_buffer_cleanup(indio_dev);
	kfree(indio_dev->channels);

	return 0;
}

static const struct platform_device_id hid_prox_ids[] = {
	{
		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
		.name = "HID-SENSOR-200011",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, hid_prox_ids);

static struct platform_driver hid_prox_platform_driver = {
	.id_table = hid_prox_ids,
	.driver = {
		.name	= KBUILD_MODNAME,
		.pm	= &hid_sensor_pm_ops,
	},
	.probe		= hid_prox_probe,
	.remove		= hid_prox_remove,
};
module_platform_driver(hid_prox_platform_driver);

MODULE_DESCRIPTION("HID Sensor Proximity");
MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
39a3a013 AP	1	/*
	2	* HID Sensors Driver
	3	* Copyright (c) 2014, Intel Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program.
	16	*
	17	*/
	18	#include <linux/device.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/module.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/irq.h>
	23	#include <linux/slab.h>
1eef0620	24	#include <linux/delay.h>
39a3a013 AP	25	#include <linux/hid-sensor-hub.h>
	26	#include <linux/iio/iio.h>
	27	#include <linux/iio/sysfs.h>
	28	#include <linux/iio/buffer.h>
	29	#include <linux/iio/trigger_consumer.h>
	30	#include <linux/iio/triggered_buffer.h>
	31	#include "../common/hid-sensors/hid-sensor-trigger.h"
	32
	33	#define CHANNEL_SCAN_INDEX_PRESENCE 0
	34
	35	struct prox_state {
	36	struct hid_sensor_hub_callbacks callbacks;
	37	struct hid_sensor_common common_attributes;
	38	struct hid_sensor_hub_attribute_info prox_attr;
	39	u32 human_presence;
	40	};
	41
	42	/* Channel definitions */
	43	static const struct iio_chan_spec prox_channels[] = {
	44	{
	45	.type = IIO_PROXIMITY,
39a3a013 AP	46	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	47	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	48	BIT(IIO_CHAN_INFO_SCALE) \|
	49	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	50	BIT(IIO_CHAN_INFO_HYSTERESIS),
	51	.scan_index = CHANNEL_SCAN_INDEX_PRESENCE,
	52	}
	53	};
	54
	55	/* Adjust channel real bits based on report descriptor */
	56	static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
	57	int channel, int size)
	58	{
	59	channels[channel].scan_type.sign = 's';
	60	/* Real storage bits will change based on the report desc. */
	61	channels[channel].scan_type.realbits = size * 8;
	62	/* Maximum size of a sample to capture is u32 */
	63	channels[channel].scan_type.storagebits = sizeof(u32) * 8;
	64	}
	65
	66	/* Channel read_raw handler */
	67	static int prox_read_raw(struct iio_dev *indio_dev,
	68	struct iio_chan_spec const *chan,
	69	int val, int val2,
	70	long mask)
	71	{
	72	struct prox_state *prox_state = iio_priv(indio_dev);
	73	int report_id = -1;
	74	u32 address;
39a3a013 AP	75	int ret_type;
	76
	77	*val = 0;
	78	*val2 = 0;
	79	switch (mask) {
	80	case IIO_CHAN_INFO_RAW:
	81	switch (chan->scan_index) {
	82	case CHANNEL_SCAN_INDEX_PRESENCE:
	83	report_id = prox_state->prox_attr.report_id;
	84	address =
	85	HID_USAGE_SENSOR_HUMAN_PRESENCE;
	86	break;
	87	default:
	88	report_id = -1;
	89	break;
	90	}
1eef0620	91	if (report_id >= 0) {
1eef0620 SP	92	hid_sensor_power_state(&prox_state->common_attributes,
1eef0620 SP	93	true);
39a3a013 AP	94	*val = sensor_hub_input_attr_get_raw_value(
	95	prox_state->common_attributes.hsdev,
	96	HID_USAGE_SENSOR_PROX, address,
b3f4737d SP	97	report_id,
b3f4737d SP	98	SENSOR_HUB_SYNC);
1eef0620 SP	99	hid_sensor_power_state(&prox_state->common_attributes,
	100	false);
	101	} else {
39a3a013 AP	102	*val = 0;
	103	return -EINVAL;
	104	}
	105	ret_type = IIO_VAL_INT;
	106	break;
	107	case IIO_CHAN_INFO_SCALE:
	108	*val = prox_state->prox_attr.units;
	109	ret_type = IIO_VAL_INT;
	110	break;
	111	case IIO_CHAN_INFO_OFFSET:
	112	*val = hid_sensor_convert_exponent(
	113	prox_state->prox_attr.unit_expo);
	114	ret_type = IIO_VAL_INT;
	115	break;
	116	case IIO_CHAN_INFO_SAMP_FREQ:
4ff9f633	117	ret_type = hid_sensor_read_samp_freq_value(
39a3a013	118	&prox_state->common_attributes, val, val2);
39a3a013 AP	119	break;
39a3a013 AP	120	case IIO_CHAN_INFO_HYSTERESIS:
4ff9f633	121	ret_type = hid_sensor_read_raw_hyst_value(
39a3a013	122	&prox_state->common_attributes, val, val2);
39a3a013 AP	123	break;
	124	default:
	125	ret_type = -EINVAL;
	126	break;
	127	}
	128
	129	return ret_type;
	130	}
	131
	132	/* Channel write_raw handler */
	133	static int prox_write_raw(struct iio_dev *indio_dev,
	134	struct iio_chan_spec const *chan,
	135	int val,
	136	int val2,
	137	long mask)
	138	{
	139	struct prox_state *prox_state = iio_priv(indio_dev);
	140	int ret = 0;
	141
	142	switch (mask) {
	143	case IIO_CHAN_INFO_SAMP_FREQ:
	144	ret = hid_sensor_write_samp_freq_value(
	145	&prox_state->common_attributes, val, val2);
	146	break;
	147	case IIO_CHAN_INFO_HYSTERESIS:
	148	ret = hid_sensor_write_raw_hyst_value(
	149	&prox_state->common_attributes, val, val2);
	150	break;
	151	default:
	152	ret = -EINVAL;
	153	}
	154
	155	return ret;
	156	}
	157
	158	static const struct iio_info prox_info = {
	159	.driver_module = THIS_MODULE,
	160	.read_raw = &prox_read_raw,
	161	.write_raw = &prox_write_raw,
	162	};
	163
	164	/* Function to push data to buffer */
	165	static void hid_sensor_push_data(struct iio_dev indio_dev, const void data,
	166	int len)
	167	{
	168	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
	169	iio_push_to_buffers(indio_dev, data);
	170	}
	171
	172	/* Callback handler to send event after all samples are received and captured */
	173	static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
	174	unsigned usage_id,
	175	void *priv)
	176	{
	177	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	178	struct prox_state *prox_state = iio_priv(indio_dev);
	179
56ff6be6 SP	180	dev_dbg(&indio_dev->dev, "prox_proc_event\n");
56ff6be6 SP	181	if (atomic_read(&prox_state->common_attributes.data_ready))
39a3a013 AP	182	hid_sensor_push_data(indio_dev,
	183	&prox_state->human_presence,
	184	sizeof(prox_state->human_presence));
	185
	186	return 0;
	187	}
	188
	189	/* Capture samples in local storage */
	190	static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
	191	unsigned usage_id,
	192	size_t raw_len, char *raw_data,
	193	void *priv)
	194	{
	195	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	196	struct prox_state *prox_state = iio_priv(indio_dev);
	197	int ret = -EINVAL;
	198
	199	switch (usage_id) {
	200	case HID_USAGE_SENSOR_HUMAN_PRESENCE:
	201	prox_state->human_presence = (u32 )raw_data;
	202	ret = 0;
	203	break;
	204	default:
	205	break;
	206	}
	207
	208	return ret;
	209	}
	210
	211	/* Parse report which is specific to an usage id*/
	212	static int prox_parse_report(struct platform_device *pdev,
	213	struct hid_sensor_hub_device *hsdev,
	214	struct iio_chan_spec *channels,
	215	unsigned usage_id,
	216	struct prox_state *st)
	217	{
	218	int ret;
	219
	220	ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
	221	usage_id,
	222	HID_USAGE_SENSOR_HUMAN_PRESENCE,
	223	&st->prox_attr);
	224	if (ret < 0)
	225	return ret;
	226	prox_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_PRESENCE,
	227	st->prox_attr.size);
	228
	229	dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
	230	st->prox_attr.report_id);
	231
	232	/* Set Sensitivity field ids, when there is no individual modifier */
	233	if (st->common_attributes.sensitivity.index < 0) {
	234	sensor_hub_input_get_attribute_info(hsdev,
	235	HID_FEATURE_REPORT, usage_id,
	236	HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS \|
	237	HID_USAGE_SENSOR_DATA_PRESENCE,
	238	&st->common_attributes.sensitivity);
	239	dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
	240	st->common_attributes.sensitivity.index,
	241	st->common_attributes.sensitivity.report_id);
	242	}
	243	return ret;
	244	}
	245
246	/* Function to initialize the processing for usage id */
247	static int hid_prox_probe(struct platform_device *pdev)
248	{
249	int ret = 0;
250	static const char *name = "prox";
251	struct iio_dev *indio_dev;
252	struct prox_state *prox_state;
253	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
39a3a013 AP	254
	255	indio_dev = devm_iio_device_alloc(&pdev->dev,
	256	sizeof(struct prox_state));
	257	if (!indio_dev)
	258	return -ENOMEM;
	259	platform_set_drvdata(pdev, indio_dev);
	260
	261	prox_state = iio_priv(indio_dev);
	262	prox_state->common_attributes.hsdev = hsdev;
	263	prox_state->common_attributes.pdev = pdev;
	264
	265	ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_PROX,
	266	&prox_state->common_attributes);
	267	if (ret) {
	268	dev_err(&pdev->dev, "failed to setup common attributes\n");
	269	return ret;
	270	}
	271
f0828ba9 FE	272	indio_dev->channels = kmemdup(prox_channels, sizeof(prox_channels),
	273	GFP_KERNEL);
	274	if (!indio_dev->channels) {
39a3a013 AP	275	dev_err(&pdev->dev, "failed to duplicate channels\n");
	276	return -ENOMEM;
	277	}
	278
f0828ba9 FE	279	ret = prox_parse_report(pdev, hsdev,
f0828ba9 FE	280	(struct iio_chan_spec *)indio_dev->channels,
39a3a013 AP	281	HID_USAGE_SENSOR_PROX, prox_state);
	282	if (ret) {
	283	dev_err(&pdev->dev, "failed to setup attributes\n");
	284	goto error_free_dev_mem;
	285	}
	286
1ca0259b	287	indio_dev->num_channels = ARRAY_SIZE(prox_channels);
39a3a013 AP	288	indio_dev->dev.parent = &pdev->dev;
	289	indio_dev->info = &prox_info;
	290	indio_dev->name = name;
	291	indio_dev->modes = INDIO_DIRECT_MODE;
	292
	293	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
	294	NULL, NULL);
	295	if (ret) {
	296	dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
	297	goto error_free_dev_mem;
	298	}
56ff6be6	299	atomic_set(&prox_state->common_attributes.data_ready, 0);
39a3a013 AP	300	ret = hid_sensor_setup_trigger(indio_dev, name,
	301	&prox_state->common_attributes);
	302	if (ret) {
	303	dev_err(&pdev->dev, "trigger setup failed\n");
	304	goto error_unreg_buffer_funcs;
	305	}
	306
	307	ret = iio_device_register(indio_dev);
	308	if (ret) {
	309	dev_err(&pdev->dev, "device register failed\n");
	310	goto error_remove_trigger;
	311	}
	312
	313	prox_state->callbacks.send_event = prox_proc_event;
	314	prox_state->callbacks.capture_sample = prox_capture_sample;
	315	prox_state->callbacks.pdev = pdev;
	316	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_PROX,
	317	&prox_state->callbacks);
	318	if (ret < 0) {
	319	dev_err(&pdev->dev, "callback reg failed\n");
	320	goto error_iio_unreg;
	321	}
	322
	323	return ret;
	324
	325	error_iio_unreg:
	326	iio_device_unregister(indio_dev);
	327	error_remove_trigger:
	328	hid_sensor_remove_trigger(&prox_state->common_attributes);
	329	error_unreg_buffer_funcs:
	330	iio_triggered_buffer_cleanup(indio_dev);
	331	error_free_dev_mem:
	332	kfree(indio_dev->channels);
	333	return ret;
	334	}
	335
	336	/* Function to deinitialize the processing for usage id */
	337	static int hid_prox_remove(struct platform_device *pdev)
	338	{
	339	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	340	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
	341	struct prox_state *prox_state = iio_priv(indio_dev);
	342
	343	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
	344	iio_device_unregister(indio_dev);
	345	hid_sensor_remove_trigger(&prox_state->common_attributes);
	346	iio_triggered_buffer_cleanup(indio_dev);
	347	kfree(indio_dev->channels);
	348
	349	return 0;
	350	}
	351
42050861	352	static const struct platform_device_id hid_prox_ids[] = {
39a3a013 AP	353	{
	354	/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
	355	.name = "HID-SENSOR-200011",
	356	},
	357	{ /* sentinel */ }
	358	};
	359	MODULE_DEVICE_TABLE(platform, hid_prox_ids);
	360
	361	static struct platform_driver hid_prox_platform_driver = {
	362	.id_table = hid_prox_ids,
	363	.driver = {
	364	.name = KBUILD_MODNAME,
a357b9b0	365	.pm = &hid_sensor_pm_ops,
39a3a013 AP	366	},
	367	.probe = hid_prox_probe,
	368	.remove = hid_prox_remove,
	369	};
	370	module_platform_driver(hid_prox_platform_driver);
	371
	372	MODULE_DESCRIPTION("HID Sensor Proximity");
	373	MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
	374	MODULE_LICENSE("GPL");