[linux-block.git] / drivers / iio / orientation / hid-sensor-rotation.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * HID Sensors Driver
 * Copyright (c) 2014, Intel Corporation.
 */

#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/hid-sensor-hub.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include "../common/hid-sensors/hid-sensor-trigger.h"

struct dev_rot_state {
	struct hid_sensor_hub_callbacks callbacks;
	struct hid_sensor_common common_attributes;
	struct hid_sensor_hub_attribute_info quaternion;
	struct {
		u32 sampled_vals[4] __aligned(16);
		u64 timestamp __aligned(8);
	} scan;
	int scale_pre_decml;
	int scale_post_decml;
	int scale_precision;
	int value_offset;
	s64 timestamp;
};

/* Channel definitions */
static const struct iio_chan_spec dev_rot_channels[] = {
	{
		.type = IIO_ROT,
		.modified = 1,
		.channel2 = IIO_MOD_QUATERNION,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
					BIT(IIO_CHAN_INFO_OFFSET) |
					BIT(IIO_CHAN_INFO_SCALE) |
					BIT(IIO_CHAN_INFO_HYSTERESIS),
		.scan_index = 0
	},
	IIO_CHAN_SOFT_TIMESTAMP(1)
};

/* Adjust channel real bits based on report descriptor */
static void dev_rot_adjust_channel_bit_mask(struct iio_chan_spec *chan,
						int size)
{
	chan->scan_type.sign = 's';
	/* Real storage bits will change based on the report desc. */
	chan->scan_type.realbits = size * 8;
	/* Maximum size of a sample to capture is u32 */
	chan->scan_type.storagebits = sizeof(u32) * 8;
	chan->scan_type.repeat = 4;
}

/* Channel read_raw handler */
static int dev_rot_read_raw(struct iio_dev *indio_dev,
				struct iio_chan_spec const *chan,
				int size, int *vals, int *val_len,
				long mask)
{
	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	int ret_type;
	int i;

	vals[0] = 0;
	vals[1] = 0;

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		if (size >= 4) {
			for (i = 0; i < 4; ++i)
				vals[i] = rot_state->scan.sampled_vals[i];
			ret_type = IIO_VAL_INT_MULTIPLE;
			*val_len =  4;
		} else
			ret_type = -EINVAL;
		break;
	case IIO_CHAN_INFO_SCALE:
		vals[0] = rot_state->scale_pre_decml;
		vals[1] = rot_state->scale_post_decml;
		return rot_state->scale_precision;

	case IIO_CHAN_INFO_OFFSET:
		*vals = rot_state->value_offset;
		return IIO_VAL_INT;

	case IIO_CHAN_INFO_SAMP_FREQ:
		ret_type = hid_sensor_read_samp_freq_value(
			&rot_state->common_attributes, &vals[0], &vals[1]);
		break;
	case IIO_CHAN_INFO_HYSTERESIS:
		ret_type = hid_sensor_read_raw_hyst_value(
			&rot_state->common_attributes, &vals[0], &vals[1]);
		break;
	default:
		ret_type = -EINVAL;
		break;
	}

	return ret_type;
}

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

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

	return ret;
}

static const struct iio_info dev_rot_info = {
	.read_raw_multi = &dev_rot_read_raw,
	.write_raw = &dev_rot_write_raw,
};

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

	dev_dbg(&indio_dev->dev, "dev_rot_proc_event\n");
	if (atomic_read(&rot_state->common_attributes.data_ready)) {
		if (!rot_state->timestamp)
			rot_state->timestamp = iio_get_time_ns(indio_dev);

		iio_push_to_buffers_with_timestamp(indio_dev, &rot_state->scan,
						   rot_state->timestamp);

		rot_state->timestamp = 0;
	}

	return 0;
}

/* Capture samples in local storage */
static int dev_rot_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 dev_rot_state *rot_state = iio_priv(indio_dev);

	if (usage_id == HID_USAGE_SENSOR_ORIENT_QUATERNION) {
		memcpy(&rot_state->scan.sampled_vals, raw_data,
		       sizeof(rot_state->scan.sampled_vals));

		dev_dbg(&indio_dev->dev, "Recd Quat len:%zu::%zu\n", raw_len,
			sizeof(rot_state->scan.sampled_vals));
	} else if (usage_id == HID_USAGE_SENSOR_TIME_TIMESTAMP) {
		rot_state->timestamp = hid_sensor_convert_timestamp(&rot_state->common_attributes,
								    *(s64 *)raw_data);
	}

	return 0;
}

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

	ret = sensor_hub_input_get_attribute_info(hsdev,
				HID_INPUT_REPORT,
				usage_id,
				HID_USAGE_SENSOR_ORIENT_QUATERNION,
				&st->quaternion);
	if (ret)
		return ret;

	dev_rot_adjust_channel_bit_mask(&channels[0],
		st->quaternion.size / 4);

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

	dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n",
				st->quaternion.size);

	st->scale_precision = hid_sensor_format_scale(
				hsdev->usage,
				&st->quaternion,
				&st->scale_pre_decml, &st->scale_post_decml);

	/* 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_ORIENTATION,
			&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 0;
}

/* Function to initialize the processing for usage id */
static int hid_dev_rot_probe(struct platform_device *pdev)
{
	int ret;
	char *name;
	struct iio_dev *indio_dev;
	struct dev_rot_state *rot_state;
	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;

	indio_dev = devm_iio_device_alloc(&pdev->dev,
					  sizeof(struct dev_rot_state));
	if (indio_dev == NULL)
		return -ENOMEM;

	platform_set_drvdata(pdev, indio_dev);

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

	switch (hsdev->usage) {
	case HID_USAGE_SENSOR_DEVICE_ORIENTATION:
		name = "dev_rotation";
		break;
	case HID_USAGE_SENSOR_RELATIVE_ORIENTATION:
		name = "relative_orientation";
		break;
	case HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION:
		name = "geomagnetic_orientation";
		break;
	default:
		return -EINVAL;
	}

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

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

	ret = dev_rot_parse_report(pdev, hsdev,
				   (struct iio_chan_spec *)indio_dev->channels,
					hsdev->usage, rot_state);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup attributes\n");
		return ret;
	}

	indio_dev->num_channels = ARRAY_SIZE(dev_rot_channels);
	indio_dev->info = &dev_rot_info;
	indio_dev->name = name;
	indio_dev->modes = INDIO_DIRECT_MODE;

	atomic_set(&rot_state->common_attributes.data_ready, 0);

	ret = hid_sensor_setup_trigger(indio_dev, name,
					&rot_state->common_attributes);
	if (ret) {
		dev_err(&pdev->dev, "trigger setup failed\n");
		return ret;
	}

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

	rot_state->callbacks.send_event = dev_rot_proc_event;
	rot_state->callbacks.capture_sample = dev_rot_capture_sample;
	rot_state->callbacks.pdev = pdev;
	ret = sensor_hub_register_callback(hsdev, hsdev->usage,
					&rot_state->callbacks);
	if (ret) {
		dev_err(&pdev->dev, "callback reg failed\n");
		goto error_iio_unreg;
	}

	return 0;

error_iio_unreg:
	iio_device_unregister(indio_dev);
error_remove_trigger:
	hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);
	return ret;
}

/* Function to deinitialize the processing for usage id */
static int hid_dev_rot_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 dev_rot_state *rot_state = iio_priv(indio_dev);

	sensor_hub_remove_callback(hsdev, hsdev->usage);
	iio_device_unregister(indio_dev);
	hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);

	return 0;
}

static const struct platform_device_id hid_dev_rot_ids[] = {
	{
		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
		.name = "HID-SENSOR-20008a",
	},
	{
		/* Relative orientation(AG) sensor */
		.name = "HID-SENSOR-20008e",
	},
	{
		/* Geomagnetic orientation(AM) sensor */
		.name = "HID-SENSOR-2000c1",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids);

static struct platform_driver hid_dev_rot_platform_driver = {
	.id_table = hid_dev_rot_ids,
	.driver = {
		.name	= KBUILD_MODNAME,
		.pm     = &hid_sensor_pm_ops,
	},
	.probe		= hid_dev_rot_probe,
	.remove		= hid_dev_rot_remove,
};
module_platform_driver(hid_dev_rot_platform_driver);

MODULE_DESCRIPTION("HID Sensor Device Rotation");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
2025cf9e	1	// SPDX-License-Identifier: GPL-2.0-only
fc18dddc SP	2	/*
	3	* HID Sensors Driver
	4	* Copyright (c) 2014, Intel Corporation.
fc18dddc SP	5	*/
	6
	7	#include <linux/device.h>
	8	#include <linux/platform_device.h>
	9	#include <linux/module.h>
	10	#include <linux/interrupt.h>
	11	#include <linux/irq.h>
	12	#include <linux/slab.h>
	13	#include <linux/hid-sensor-hub.h>
	14	#include <linux/iio/iio.h>
	15	#include <linux/iio/sysfs.h>
	16	#include <linux/iio/buffer.h>
fc18dddc SP	17	#include "../common/hid-sensors/hid-sensor-trigger.h"
	18
	19	struct dev_rot_state {
	20	struct hid_sensor_hub_callbacks callbacks;
	21	struct hid_sensor_common common_attributes;
	22	struct hid_sensor_hub_attribute_info quaternion;
4a3582c8 YX	23	struct {
	24	u32 sampled_vals[4] __aligned(16);
	25	u64 timestamp __aligned(8);
	26	} scan;
a78587d3 SH	27	int scale_pre_decml;
	28	int scale_post_decml;
	29	int scale_precision;
	30	int value_offset;
4a3582c8	31	s64 timestamp;
fc18dddc SP	32	};
	33
	34	/* Channel definitions */
	35	static const struct iio_chan_spec dev_rot_channels[] = {
	36	{
	37	.type = IIO_ROT,
	38	.modified = 1,
	39	.channel2 = IIO_MOD_QUATERNION,
	40	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	41	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
a78587d3 SH	42	BIT(IIO_CHAN_INFO_OFFSET) \|
a78587d3 SH	43	BIT(IIO_CHAN_INFO_SCALE) \|
4a3582c8 YX	44	BIT(IIO_CHAN_INFO_HYSTERESIS),
	45	.scan_index = 0
	46	},
	47	IIO_CHAN_SOFT_TIMESTAMP(1)
fc18dddc SP	48	};
	49
	50	/* Adjust channel real bits based on report descriptor */
	51	static void dev_rot_adjust_channel_bit_mask(struct iio_chan_spec *chan,
	52	int size)
	53	{
	54	chan->scan_type.sign = 's';
	55	/* Real storage bits will change based on the report desc. */
	56	chan->scan_type.realbits = size * 8;
	57	/* Maximum size of a sample to capture is u32 */
	58	chan->scan_type.storagebits = sizeof(u32) * 8;
	59	chan->scan_type.repeat = 4;
	60	}
	61
	62	/* Channel read_raw handler */
	63	static int dev_rot_read_raw(struct iio_dev *indio_dev,
	64	struct iio_chan_spec const *chan,
	65	int size, int vals, int val_len,
	66	long mask)
	67	{
	68	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	69	int ret_type;
	70	int i;
	71
	72	vals[0] = 0;
	73	vals[1] = 0;
	74
	75	switch (mask) {
	76	case IIO_CHAN_INFO_RAW:
	77	if (size >= 4) {
	78	for (i = 0; i < 4; ++i)
4a3582c8	79	vals[i] = rot_state->scan.sampled_vals[i];
fc18dddc SP	80	ret_type = IIO_VAL_INT_MULTIPLE;
	81	*val_len = 4;
	82	} else
	83	ret_type = -EINVAL;
	84	break;
a78587d3 SH	85	case IIO_CHAN_INFO_SCALE:
	86	vals[0] = rot_state->scale_pre_decml;
	87	vals[1] = rot_state->scale_post_decml;
	88	return rot_state->scale_precision;
	89
	90	case IIO_CHAN_INFO_OFFSET:
	91	*vals = rot_state->value_offset;
	92	return IIO_VAL_INT;
	93
fc18dddc SP	94	case IIO_CHAN_INFO_SAMP_FREQ:
	95	ret_type = hid_sensor_read_samp_freq_value(
	96	&rot_state->common_attributes, &vals[0], &vals[1]);
	97	break;
	98	case IIO_CHAN_INFO_HYSTERESIS:
	99	ret_type = hid_sensor_read_raw_hyst_value(
	100	&rot_state->common_attributes, &vals[0], &vals[1]);
	101	break;
	102	default:
	103	ret_type = -EINVAL;
	104	break;
	105	}
	106
	107	return ret_type;
	108	}
	109
	110	/* Channel write_raw handler */
	111	static int dev_rot_write_raw(struct iio_dev *indio_dev,
	112	struct iio_chan_spec const *chan,
	113	int val,
	114	int val2,
	115	long mask)
	116	{
	117	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	118	int ret;
	119
	120	switch (mask) {
	121	case IIO_CHAN_INFO_SAMP_FREQ:
	122	ret = hid_sensor_write_samp_freq_value(
	123	&rot_state->common_attributes, val, val2);
	124	break;
	125	case IIO_CHAN_INFO_HYSTERESIS:
	126	ret = hid_sensor_write_raw_hyst_value(
	127	&rot_state->common_attributes, val, val2);
	128	break;
	129	default:
	130	ret = -EINVAL;
	131	}
	132
	133	return ret;
	134	}
	135
	136	static const struct iio_info dev_rot_info = {
fc18dddc SP	137	.read_raw_multi = &dev_rot_read_raw,
	138	.write_raw = &dev_rot_write_raw,
	139	};
	140
fc18dddc SP	141	/* Callback handler to send event after all samples are received and captured */
	142	static int dev_rot_proc_event(struct hid_sensor_hub_device *hsdev,
	143	unsigned usage_id,
	144	void *priv)
	145	{
	146	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	147	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	148
56ff6be6	149	dev_dbg(&indio_dev->dev, "dev_rot_proc_event\n");
4a3582c8 YX	150	if (atomic_read(&rot_state->common_attributes.data_ready)) {
	151	if (!rot_state->timestamp)
	152	rot_state->timestamp = iio_get_time_ns(indio_dev);
	153
	154	iio_push_to_buffers_with_timestamp(indio_dev, &rot_state->scan,
	155	rot_state->timestamp);
	156
	157	rot_state->timestamp = 0;
	158	}
fc18dddc SP	159
	160	return 0;
	161	}
	162
	163	/* Capture samples in local storage */
	164	static int dev_rot_capture_sample(struct hid_sensor_hub_device *hsdev,
	165	unsigned usage_id,
	166	size_t raw_len, char *raw_data,
	167	void *priv)
	168	{
	169	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	170	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	171
	172	if (usage_id == HID_USAGE_SENSOR_ORIENT_QUATERNION) {
4a3582c8 YX	173	memcpy(&rot_state->scan.sampled_vals, raw_data,
	174	sizeof(rot_state->scan.sampled_vals));
	175
fc18dddc	176	dev_dbg(&indio_dev->dev, "Recd Quat len:%zu::%zu\n", raw_len,
4a3582c8 YX	177	sizeof(rot_state->scan.sampled_vals));
	178	} else if (usage_id == HID_USAGE_SENSOR_TIME_TIMESTAMP) {
	179	rot_state->timestamp = hid_sensor_convert_timestamp(&rot_state->common_attributes,
	180	(s64 )raw_data);
fc18dddc SP	181	}
	182
	183	return 0;
	184	}
	185
	186	/* Parse report which is specific to an usage id*/
	187	static int dev_rot_parse_report(struct platform_device *pdev,
	188	struct hid_sensor_hub_device *hsdev,
	189	struct iio_chan_spec *channels,
	190	unsigned usage_id,
	191	struct dev_rot_state *st)
	192	{
	193	int ret;
	194
	195	ret = sensor_hub_input_get_attribute_info(hsdev,
	196	HID_INPUT_REPORT,
	197	usage_id,
	198	HID_USAGE_SENSOR_ORIENT_QUATERNION,
	199	&st->quaternion);
	200	if (ret)
	201	return ret;
	202
	203	dev_rot_adjust_channel_bit_mask(&channels[0],
	204	st->quaternion.size / 4);
	205
	206	dev_dbg(&pdev->dev, "dev_rot %x:%x\n", st->quaternion.index,
	207	st->quaternion.report_id);
	208
	209	dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n",
	210	st->quaternion.size);
	211
a78587d3 SH	212	st->scale_precision = hid_sensor_format_scale(
	213	hsdev->usage,
	214	&st->quaternion,
	215	&st->scale_pre_decml, &st->scale_post_decml);
	216
fc18dddc SP	217	/* Set Sensitivity field ids, when there is no individual modifier */
	218	if (st->common_attributes.sensitivity.index < 0) {
	219	sensor_hub_input_get_attribute_info(hsdev,
	220	HID_FEATURE_REPORT, usage_id,
	221	HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS \|
	222	HID_USAGE_SENSOR_DATA_ORIENTATION,
	223	&st->common_attributes.sensitivity);
	224	dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
	225	st->common_attributes.sensitivity.index,
	226	st->common_attributes.sensitivity.report_id);
	227	}
	228
	229	return 0;
	230	}
	231
	232	/* Function to initialize the processing for usage id */
	233	static int hid_dev_rot_probe(struct platform_device *pdev)
	234	{
	235	int ret;
50db2cd4	236	char *name;
fc18dddc SP	237	struct iio_dev *indio_dev;
	238	struct dev_rot_state *rot_state;
	239	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
fc18dddc SP	240
	241	indio_dev = devm_iio_device_alloc(&pdev->dev,
	242	sizeof(struct dev_rot_state));
	243	if (indio_dev == NULL)
	244	return -ENOMEM;
	245
	246	platform_set_drvdata(pdev, indio_dev);
	247
	248	rot_state = iio_priv(indio_dev);
	249	rot_state->common_attributes.hsdev = hsdev;
	250	rot_state->common_attributes.pdev = pdev;
	251
9ff88edc SH	252	switch (hsdev->usage) {
	253	case HID_USAGE_SENSOR_DEVICE_ORIENTATION:
	254	name = "dev_rotation";
	255	break;
	256	case HID_USAGE_SENSOR_RELATIVE_ORIENTATION:
	257	name = "relative_orientation";
	258	break;
00907c7a SH	259	case HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION:
	260	name = "geomagnetic_orientation";
	261	break;
9ff88edc SH	262	default:
	263	return -EINVAL;
	264	}
	265
	266	ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage,
fc18dddc SP	267	&rot_state->common_attributes);
	268	if (ret) {
	269	dev_err(&pdev->dev, "failed to setup common attributes\n");
	270	return ret;
	271	}
	272
2bd04628 FE	273	indio_dev->channels = devm_kmemdup(&pdev->dev, dev_rot_channels,
	274	sizeof(dev_rot_channels),
	275	GFP_KERNEL);
	276	if (!indio_dev->channels) {
fc18dddc SP	277	dev_err(&pdev->dev, "failed to duplicate channels\n");
	278	return -ENOMEM;
	279	}
	280
2bd04628 FE	281	ret = dev_rot_parse_report(pdev, hsdev,
2bd04628 FE	282	(struct iio_chan_spec *)indio_dev->channels,
9ff88edc	283	hsdev->usage, rot_state);
fc18dddc SP	284	if (ret) {
	285	dev_err(&pdev->dev, "failed to setup attributes\n");
	286	return ret;
	287	}
	288
fc18dddc	289	indio_dev->num_channels = ARRAY_SIZE(dev_rot_channels);
fc18dddc SP	290	indio_dev->info = &dev_rot_info;
	291	indio_dev->name = name;
	292	indio_dev->modes = INDIO_DIRECT_MODE;
	293
56ff6be6	294	atomic_set(&rot_state->common_attributes.data_ready, 0);
067fda1c	295
fc18dddc SP	296	ret = hid_sensor_setup_trigger(indio_dev, name,
	297	&rot_state->common_attributes);
	298	if (ret) {
	299	dev_err(&pdev->dev, "trigger setup failed\n");
067fda1c	300	return ret;
fc18dddc SP	301	}
	302
	303	ret = iio_device_register(indio_dev);
	304	if (ret) {
	305	dev_err(&pdev->dev, "device register failed\n");
	306	goto error_remove_trigger;
	307	}
	308
	309	rot_state->callbacks.send_event = dev_rot_proc_event;
	310	rot_state->callbacks.capture_sample = dev_rot_capture_sample;
	311	rot_state->callbacks.pdev = pdev;
9ff88edc	312	ret = sensor_hub_register_callback(hsdev, hsdev->usage,
fc18dddc SP	313	&rot_state->callbacks);
	314	if (ret) {
	315	dev_err(&pdev->dev, "callback reg failed\n");
	316	goto error_iio_unreg;
	317	}
	318
	319	return 0;
	320
	321	error_iio_unreg:
	322	iio_device_unregister(indio_dev);
	323	error_remove_trigger:
067fda1c	324	hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);
fc18dddc SP	325	return ret;
	326	}
	327
	328	/* Function to deinitialize the processing for usage id */
	329	static int hid_dev_rot_remove(struct platform_device *pdev)
	330	{
	331	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	332	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
	333	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	334
9ff88edc	335	sensor_hub_remove_callback(hsdev, hsdev->usage);
fc18dddc	336	iio_device_unregister(indio_dev);
067fda1c	337	hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);
fc18dddc SP	338
	339	return 0;
	340	}
	341
6b490c6c	342	static const struct platform_device_id hid_dev_rot_ids[] = {
fc18dddc SP	343	{
	344	/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
	345	.name = "HID-SENSOR-20008a",
	346	},
9ff88edc SH	347	{
	348	/* Relative orientation(AG) sensor */
	349	.name = "HID-SENSOR-20008e",
	350	},
00907c7a SH	351	{
	352	/* Geomagnetic orientation(AM) sensor */
	353	.name = "HID-SENSOR-2000c1",
	354	},
fc18dddc SP	355	{ /* sentinel */ }
	356	};
	357	MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids);
	358
	359	static struct platform_driver hid_dev_rot_platform_driver = {
	360	.id_table = hid_dev_rot_ids,
	361	.driver = {
	362	.name = KBUILD_MODNAME,
8af644a7	363	.pm = &hid_sensor_pm_ops,
fc18dddc SP	364	},
	365	.probe = hid_dev_rot_probe,
	366	.remove = hid_dev_rot_remove,
	367	};
	368	module_platform_driver(hid_dev_rot_platform_driver);
	369
	370	MODULE_DESCRIPTION("HID Sensor Device Rotation");
	371	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	372	MODULE_LICENSE("GPL");