[linux-block.git] / drivers / iio / light / hid-sensor-als.c

/*
 * HID Sensors Driver
 * Copyright (c) 2012, 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; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */
#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 <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include "../common/hid-sensors/hid-sensor-trigger.h"

#define CHANNEL_SCAN_INDEX_ILLUM 0

struct als_state {
	struct hid_sensor_hub_callbacks callbacks;
	struct hid_sensor_common common_attributes;
	struct hid_sensor_hub_attribute_info als_illum;
	u32 illum;
};

/* Channel definitions */
static const struct iio_chan_spec als_channels[] = {
	{
		.type = IIO_INTENSITY,
		.modified = 1,
		.channel2 = IIO_MOD_LIGHT_BOTH,
		.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_ILLUM,
	}
};

/* Adjust channel real bits based on report descriptor */
static void als_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 als_read_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan,
			      int *val, int *val2,
			      long mask)
{
	struct als_state *als_state = iio_priv(indio_dev);
	int report_id = -1;
	u32 address;
	int ret;
	int ret_type;

	*val = 0;
	*val2 = 0;
	switch (mask) {
	case 0:
		switch (chan->scan_index) {
		case  CHANNEL_SCAN_INDEX_ILLUM:
			report_id = als_state->als_illum.report_id;
			address =
			HID_USAGE_SENSOR_LIGHT_ILLUM;
			break;
		default:
			report_id = -1;
			break;
		}
		if (report_id >= 0)
			*val = sensor_hub_input_attr_get_raw_value(
				als_state->common_attributes.hsdev,
				HID_USAGE_SENSOR_ALS, address,
				report_id);
		else {
			*val = 0;
			return -EINVAL;
		}
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SCALE:
		*val = als_state->als_illum.units;
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_OFFSET:
		*val = hid_sensor_convert_exponent(
				als_state->als_illum.unit_expo);
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SAMP_FREQ:
		ret = hid_sensor_read_samp_freq_value(
				&als_state->common_attributes, val, val2);
		ret_type = IIO_VAL_INT_PLUS_MICRO;
		break;
	case IIO_CHAN_INFO_HYSTERESIS:
		ret = hid_sensor_read_raw_hyst_value(
				&als_state->common_attributes, val, val2);
		ret_type = IIO_VAL_INT_PLUS_MICRO;
		break;
	default:
		ret_type = -EINVAL;
		break;
	}

	return ret_type;
}

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

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

	return ret;
}

static const struct iio_info als_info = {
	.driver_module = THIS_MODULE,
	.read_raw = &als_read_raw,
	.write_raw = &als_write_raw,
};

/* Function to push data to buffer */
static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
{
	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
	iio_push_to_buffers(indio_dev, (u8 *)data);
}

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

	dev_dbg(&indio_dev->dev, "als_proc_event [%d]\n",
				als_state->common_attributes.data_ready);
	if (als_state->common_attributes.data_ready)
		hid_sensor_push_data(indio_dev,
				(u8 *)&als_state->illum,
				sizeof(als_state->illum));

	return 0;
}

/* Capture samples in local storage */
static int als_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 als_state *als_state = iio_priv(indio_dev);
	int ret = -EINVAL;

	switch (usage_id) {
	case HID_USAGE_SENSOR_LIGHT_ILLUM:
		als_state->illum = *(u32 *)raw_data;
		ret = 0;
		break;
	default:
		break;
	}

	return ret;
}

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

	ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
			usage_id,
			HID_USAGE_SENSOR_LIGHT_ILLUM,
			&st->als_illum);
	if (ret < 0)
		return ret;
	als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_ILLUM,
					st->als_illum.size);

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

	return ret;
}

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

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

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

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

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

	ret = als_parse_report(pdev, hsdev, channels,
				HID_USAGE_SENSOR_ALS, als_state);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup attributes\n");
		goto error_free_dev_mem;
	}

	indio_dev->channels = channels;
	indio_dev->num_channels =
				ARRAY_SIZE(als_channels);
	indio_dev->dev.parent = &pdev->dev;
	indio_dev->info = &als_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;
	}
	als_state->common_attributes.data_ready = false;
	ret = hid_sensor_setup_trigger(indio_dev, name,
				&als_state->common_attributes);
	if (ret < 0) {
		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;
	}

	als_state->callbacks.send_event = als_proc_event;
	als_state->callbacks.capture_sample = als_capture_sample;
	als_state->callbacks.pdev = pdev;
	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ALS,
					&als_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(indio_dev);
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_als_remove(struct platform_device *pdev)
{
	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	struct iio_dev *indio_dev = platform_get_drvdata(pdev);

	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ALS);
	iio_device_unregister(indio_dev);
	hid_sensor_remove_trigger(indio_dev);
	iio_triggered_buffer_cleanup(indio_dev);
	kfree(indio_dev->channels);

	return 0;
}

static struct platform_device_id hid_als_ids[] = {
	{
		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
		.name = "HID-SENSOR-200041",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, hid_als_ids);

static struct platform_driver hid_als_platform_driver = {
	.id_table = hid_als_ids,
	.driver = {
		.name	= KBUILD_MODNAME,
		.owner	= THIS_MODULE,
	},
	.probe		= hid_als_probe,
	.remove		= hid_als_remove,
};
module_platform_driver(hid_als_platform_driver);

MODULE_DESCRIPTION("HID Sensor ALS");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
ed5514c9	1	/*
	2	* HID Sensors Driver
	3	* Copyright (c) 2012, 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; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	17	*
	18	*/
	19	#include <linux/device.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/module.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/irq.h>
	24	#include <linux/slab.h>
	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>
ed5514c9	31	#include "../common/hid-sensors/hid-sensor-trigger.h"
ed5514c9	32
ed5514c9	33	#define CHANNEL_SCAN_INDEX_ILLUM 0
	34
	35	struct als_state {
	36	struct hid_sensor_hub_callbacks callbacks;
e07c6d17	37	struct hid_sensor_common common_attributes;
ed5514c9	38	struct hid_sensor_hub_attribute_info als_illum;
	39	u32 illum;
	40	};
	41
	42	/* Channel definitions */
	43	static const struct iio_chan_spec als_channels[] = {
	44	{
	45	.type = IIO_INTENSITY,
	46	.modified = 1,
	47	.channel2 = IIO_MOD_LIGHT_BOTH,
ecbe18f2 JC	48	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	49	BIT(IIO_CHAN_INFO_SCALE) \|
	50	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	51	BIT(IIO_CHAN_INFO_HYSTERESIS),
ed5514c9	52	.scan_index = CHANNEL_SCAN_INDEX_ILLUM,
	53	}
	54	};
	55
	56	/* Adjust channel real bits based on report descriptor */
	57	static void als_adjust_channel_bit_mask(struct iio_chan_spec *channels,
	58	int channel, int size)
	59	{
	60	channels[channel].scan_type.sign = 's';
	61	/* Real storage bits will change based on the report desc. */
	62	channels[channel].scan_type.realbits = size * 8;
	63	/* Maximum size of a sample to capture is u32 */
	64	channels[channel].scan_type.storagebits = sizeof(u32) * 8;
	65	}
	66
	67	/* Channel read_raw handler */
	68	static int als_read_raw(struct iio_dev *indio_dev,
	69	struct iio_chan_spec const *chan,
	70	int val, int val2,
	71	long mask)
	72	{
	73	struct als_state *als_state = iio_priv(indio_dev);
	74	int report_id = -1;
	75	u32 address;
	76	int ret;
	77	int ret_type;
	78
	79	*val = 0;
	80	*val2 = 0;
	81	switch (mask) {
	82	case 0:
	83	switch (chan->scan_index) {
	84	case CHANNEL_SCAN_INDEX_ILLUM:
	85	report_id = als_state->als_illum.report_id;
	86	address =
	87	HID_USAGE_SENSOR_LIGHT_ILLUM;
	88	break;
	89	default:
	90	report_id = -1;
	91	break;
	92	}
	93	if (report_id >= 0)
	94	*val = sensor_hub_input_attr_get_raw_value(
	95	als_state->common_attributes.hsdev,
	96	HID_USAGE_SENSOR_ALS, address,
	97	report_id);
	98	else {
	99	*val = 0;
	100	return -EINVAL;
	101	}
	102	ret_type = IIO_VAL_INT;
	103	break;
	104	case IIO_CHAN_INFO_SCALE:
	105	*val = als_state->als_illum.units;
	106	ret_type = IIO_VAL_INT;
	107	break;
	108	case IIO_CHAN_INFO_OFFSET:
	109	*val = hid_sensor_convert_exponent(
	110	als_state->als_illum.unit_expo);
	111	ret_type = IIO_VAL_INT;
	112	break;
	113	case IIO_CHAN_INFO_SAMP_FREQ:
	114	ret = hid_sensor_read_samp_freq_value(
	115	&als_state->common_attributes, val, val2);
116	ret_type = IIO_VAL_INT_PLUS_MICRO;
117	break;
118	case IIO_CHAN_INFO_HYSTERESIS:
119	ret = hid_sensor_read_raw_hyst_value(
120	&als_state->common_attributes, val, val2);
121	ret_type = IIO_VAL_INT_PLUS_MICRO;
122	break;
123	default:
124	ret_type = -EINVAL;
125	break;
126	}
127
128	return ret_type;
129	}
130
131	/* Channel write_raw handler */
132	static int als_write_raw(struct iio_dev *indio_dev,
133	struct iio_chan_spec const *chan,
134	int val,
135	int val2,
136	long mask)
137	{
138	struct als_state *als_state = iio_priv(indio_dev);
139	int ret = 0;
140
141	switch (mask) {
142	case IIO_CHAN_INFO_SAMP_FREQ:
143	ret = hid_sensor_write_samp_freq_value(
144	&als_state->common_attributes, val, val2);
145	break;
146	case IIO_CHAN_INFO_HYSTERESIS:
147	ret = hid_sensor_write_raw_hyst_value(
148	&als_state->common_attributes, val, val2);
149	break;
150	default:
151	ret = -EINVAL;
152	}
153
154	return ret;
155	}
156
ed5514c9	157	static const struct iio_info als_info = {
	158	.driver_module = THIS_MODULE,
	159	.read_raw = &als_read_raw,
	160	.write_raw = &als_write_raw,
ed5514c9	161	};
	162
	163	/* Function to push data to buffer */
	164	static void hid_sensor_push_data(struct iio_dev indio_dev, u8 data, int len)
	165	{
ed5514c9	166	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
84b36ce5	167	iio_push_to_buffers(indio_dev, (u8 *)data);
ed5514c9	168	}
	169
	170	/* Callback handler to send event after all samples are received and captured */
	171	static int als_proc_event(struct hid_sensor_hub_device *hsdev,
	172	unsigned usage_id,
	173	void *priv)
	174	{
	175	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	176	struct als_state *als_state = iio_priv(indio_dev);
	177
	178	dev_dbg(&indio_dev->dev, "als_proc_event [%d]\n",
	179	als_state->common_attributes.data_ready);
	180	if (als_state->common_attributes.data_ready)
	181	hid_sensor_push_data(indio_dev,
	182	(u8 *)&als_state->illum,
	183	sizeof(als_state->illum));
	184
	185	return 0;
	186	}
	187
	188	/* Capture samples in local storage */
	189	static int als_capture_sample(struct hid_sensor_hub_device *hsdev,
	190	unsigned usage_id,
	191	size_t raw_len, char *raw_data,
	192	void *priv)
	193	{
	194	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	195	struct als_state *als_state = iio_priv(indio_dev);
	196	int ret = -EINVAL;
	197
	198	switch (usage_id) {
	199	case HID_USAGE_SENSOR_LIGHT_ILLUM:
	200	als_state->illum = (u32 )raw_data;
	201	ret = 0;
	202	break;
	203	default:
	204	break;
	205	}
	206
	207	return ret;
	208	}
	209
	210	/* Parse report which is specific to an usage id*/
	211	static int als_parse_report(struct platform_device *pdev,
	212	struct hid_sensor_hub_device *hsdev,
	213	struct iio_chan_spec *channels,
	214	unsigned usage_id,
	215	struct als_state *st)
	216	{
	217	int ret;
	218
	219	ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
	220	usage_id,
	221	HID_USAGE_SENSOR_LIGHT_ILLUM,
	222	&st->als_illum);
	223	if (ret < 0)
	224	return ret;
	225	als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_ILLUM,
	226	st->als_illum.size);
	227
	228	dev_dbg(&pdev->dev, "als %x:%x\n", st->als_illum.index,
	229	st->als_illum.report_id);
	230
	231	return ret;
232	}
233
234	/* Function to initialize the processing for usage id */
fc52692c	235	static int hid_als_probe(struct platform_device *pdev)
ed5514c9	236	{
	237	int ret = 0;
	238	static const char *name = "als";
	239	struct iio_dev *indio_dev;
	240	struct als_state *als_state;
	241	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	242	struct iio_chan_spec *channels;
	243
47aff92c SK	244	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct als_state));
	245	if (!indio_dev)
	246	return -ENOMEM;
ed5514c9	247	platform_set_drvdata(pdev, indio_dev);
	248
	249	als_state = iio_priv(indio_dev);
	250	als_state->common_attributes.hsdev = hsdev;
	251	als_state->common_attributes.pdev = pdev;
	252
	253	ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_ALS,
	254	&als_state->common_attributes);
	255	if (ret) {
	256	dev_err(&pdev->dev, "failed to setup common attributes\n");
47aff92c	257	return ret;
ed5514c9	258	}
ed5514c9	259
64ebe955	260	channels = kmemdup(als_channels, sizeof(als_channels), GFP_KERNEL);
ed5514c9	261	if (!channels) {
ed5514c9	262	dev_err(&pdev->dev, "failed to duplicate channels\n");
47aff92c	263	return -ENOMEM;
ed5514c9	264	}
	265
	266	ret = als_parse_report(pdev, hsdev, channels,
	267	HID_USAGE_SENSOR_ALS, als_state);
	268	if (ret) {
	269	dev_err(&pdev->dev, "failed to setup attributes\n");
	270	goto error_free_dev_mem;
	271	}
	272
	273	indio_dev->channels = channels;
	274	indio_dev->num_channels =
	275	ARRAY_SIZE(als_channels);
	276	indio_dev->dev.parent = &pdev->dev;
	277	indio_dev->info = &als_info;
	278	indio_dev->name = name;
	279	indio_dev->modes = INDIO_DIRECT_MODE;
	280
	281	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
	282	NULL, NULL);
	283	if (ret) {
	284	dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
	285	goto error_free_dev_mem;
	286	}
	287	als_state->common_attributes.data_ready = false;
	288	ret = hid_sensor_setup_trigger(indio_dev, name,
	289	&als_state->common_attributes);
	290	if (ret < 0) {
	291	dev_err(&pdev->dev, "trigger setup failed\n");
	292	goto error_unreg_buffer_funcs;
	293	}
	294
	295	ret = iio_device_register(indio_dev);
	296	if (ret) {
	297	dev_err(&pdev->dev, "device register failed\n");
	298	goto error_remove_trigger;
	299	}
	300
	301	als_state->callbacks.send_event = als_proc_event;
	302	als_state->callbacks.capture_sample = als_capture_sample;
	303	als_state->callbacks.pdev = pdev;
	304	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ALS,
	305	&als_state->callbacks);
	306	if (ret < 0) {
	307	dev_err(&pdev->dev, "callback reg failed\n");
	308	goto error_iio_unreg;
	309	}
	310
	311	return ret;
	312
	313	error_iio_unreg:
	314	iio_device_unregister(indio_dev);
	315	error_remove_trigger:
	316	hid_sensor_remove_trigger(indio_dev);
	317	error_unreg_buffer_funcs:
	318	iio_triggered_buffer_cleanup(indio_dev);
	319	error_free_dev_mem:
	320	kfree(indio_dev->channels);
ed5514c9	321	return ret;
	322	}
	323
	324	/* Function to deinitialize the processing for usage id */
fc52692c	325	static int hid_als_remove(struct platform_device *pdev)
ed5514c9	326	{
	327	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	328	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
	329
	330	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ALS);
	331	iio_device_unregister(indio_dev);
	332	hid_sensor_remove_trigger(indio_dev);
	333	iio_triggered_buffer_cleanup(indio_dev);
	334	kfree(indio_dev->channels);
ed5514c9	335
	336	return 0;
	337	}
	338
5b812ea5 AH	339	static struct platform_device_id hid_als_ids[] = {
	340	{
	341	/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
	342	.name = "HID-SENSOR-200041",
	343	},
	344	{ /* sentinel */ }
	345	};
	346	MODULE_DEVICE_TABLE(platform, hid_als_ids);
	347
ed5514c9	348	static struct platform_driver hid_als_platform_driver = {
5b812ea5	349	.id_table = hid_als_ids,
ed5514c9	350	.driver = {
5b812ea5	351	.name = KBUILD_MODNAME,
ed5514c9	352	.owner = THIS_MODULE,
	353	},
	354	.probe = hid_als_probe,
	355	.remove = hid_als_remove,
	356	};
	357	module_platform_driver(hid_als_platform_driver);
	358
	359	MODULE_DESCRIPTION("HID Sensor ALS");
	360	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
	361	MODULE_LICENSE("GPL");