vl6180.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * vl6180.c - Support for STMicroelectronics VL6180 ALS, range and proximity
  4 * sensor
  5 *
  6 * Copyright 2017 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
  7 * Copyright 2017 Manivannan Sadhasivam <manivannanece23@gmail.com>
  8 *
  9 * IIO driver for VL6180 (7-bit I2C slave address 0x29)
 10 *
 11 * Range: 0 to 100mm
 12 * ALS: < 1 Lux up to 100 kLux
 13 * IR: 850nm
 14 *
 15 * TODO: irq, threshold events, continuous mode, hardware buffer
 16 */
 17
 18#include <linux/module.h>
 19#include <linux/mod_devicetable.h>
 20#include <linux/i2c.h>
 21#include <linux/mutex.h>
 22#include <linux/err.h>
 23#include <linux/delay.h>
 24#include <linux/util_macros.h>
 25
 26#include <linux/iio/iio.h>
 27#include <linux/iio/sysfs.h>
 28#include <linux/iio/buffer.h>
 29#include <linux/iio/trigger.h>
 30#include <linux/iio/trigger_consumer.h>
 31#include <linux/iio/triggered_buffer.h>
 32
 33#define VL6180_DRV_NAME "vl6180"
 34
 35/* Device identification register and value */
 36#define VL6180_MODEL_ID	0x000
 37#define VL6180_MODEL_ID_VAL 0xb4
 38
 39/* Configuration registers */
 40#define VL6180_INTR_CONFIG 0x014
 41#define VL6180_INTR_CLEAR 0x015
 42#define VL6180_OUT_OF_RESET 0x016
 43#define VL6180_HOLD 0x017
 44#define VL6180_RANGE_START 0x018
 45#define VL6180_RANGE_INTER_MEAS_TIME 0x01b
 46#define VL6180_ALS_START 0x038
 47#define VL6180_ALS_INTER_MEAS_TIME 0x03e
 48#define VL6180_ALS_GAIN 0x03f
 49#define VL6180_ALS_IT 0x040
 50
 51/* Status registers */
 52#define VL6180_RANGE_STATUS 0x04d
 53#define VL6180_ALS_STATUS 0x04e
 54#define VL6180_INTR_STATUS 0x04f
 55
 56/* Result value registers */
 57#define VL6180_ALS_VALUE 0x050
 58#define VL6180_RANGE_VALUE 0x062
 59#define VL6180_RANGE_RATE 0x066
 60
 61/* bits of the RANGE_START and ALS_START register */
 62#define VL6180_MODE_CONT BIT(1) /* continuous mode */
 63#define VL6180_STARTSTOP BIT(0) /* start measurement, auto-reset */
 64
 65/* bits of the INTR_STATUS and INTR_CONFIG register */
 66#define VL6180_ALS_READY BIT(5)
 67#define VL6180_RANGE_READY BIT(2)
 68
 69/* bits of the INTR_CLEAR register */
 70#define VL6180_CLEAR_ERROR BIT(2)
 71#define VL6180_CLEAR_ALS BIT(1)
 72#define VL6180_CLEAR_RANGE BIT(0)
 73
 74/* bits of the HOLD register */
 75#define VL6180_HOLD_ON BIT(0)
 76
 77/* default value for the ALS_IT register */
 78#define VL6180_ALS_IT_100 0x63 /* 100 ms */
 79
 80/* values for the ALS_GAIN register */
 81#define VL6180_ALS_GAIN_1 0x46
 82#define VL6180_ALS_GAIN_1_25 0x45
 83#define VL6180_ALS_GAIN_1_67 0x44
 84#define VL6180_ALS_GAIN_2_5 0x43
 85#define VL6180_ALS_GAIN_5 0x42
 86#define VL6180_ALS_GAIN_10 0x41
 87#define VL6180_ALS_GAIN_20 0x40
 88#define VL6180_ALS_GAIN_40 0x47
 89
 90struct vl6180_data {
 91	struct i2c_client *client;
 92	struct mutex lock;
 93	struct completion completion;
 94	struct iio_trigger *trig;
 95	unsigned int als_gain_milli;
 96	unsigned int als_it_ms;
 97	unsigned int als_meas_rate;
 98	unsigned int range_meas_rate;
 99};
100
101enum { VL6180_ALS, VL6180_RANGE, VL6180_PROX };
102
103/**
104 * struct vl6180_chan_regs - Registers for accessing channels
105 * @drdy_mask:			Data ready bit in status register
106 * @start_reg:			Conversion start register
107 * @value_reg:			Result value register
108 * @word:			Register word length
109 */
110struct vl6180_chan_regs {
111	u8 drdy_mask;
112	u16 start_reg, value_reg;
113	bool word;
114};
115
116static const struct vl6180_chan_regs vl6180_chan_regs_table[] = {
117	[VL6180_ALS] = {
118		.drdy_mask = VL6180_ALS_READY,
119		.start_reg = VL6180_ALS_START,
120		.value_reg = VL6180_ALS_VALUE,
121		.word = true,
122	},
123	[VL6180_RANGE] = {
124		.drdy_mask = VL6180_RANGE_READY,
125		.start_reg = VL6180_RANGE_START,
126		.value_reg = VL6180_RANGE_VALUE,
127		.word = false,
128	},
129	[VL6180_PROX] = {
130		.drdy_mask = VL6180_RANGE_READY,
131		.start_reg = VL6180_RANGE_START,
132		.value_reg = VL6180_RANGE_RATE,
133		.word = true,
134	},
135};
136
137static int vl6180_read(struct i2c_client *client, u16 cmd, void *databuf,
138		       u8 len)
139{
140	__be16 cmdbuf = cpu_to_be16(cmd);
141	struct i2c_msg msgs[2] = {
142		{ .addr = client->addr, .len = sizeof(cmdbuf), .buf = (u8 *) &cmdbuf },
143		{ .addr = client->addr, .len = len, .buf = databuf,
144		  .flags = I2C_M_RD } };
145	int ret;
146
147	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
148	if (ret < 0)
149		dev_err(&client->dev, "failed reading register 0x%04x\n", cmd);
150
151	return ret;
152}
153
154static int vl6180_read_byte(struct i2c_client *client, u16 cmd)
155{
156	u8 data;
157	int ret;
158
159	ret = vl6180_read(client, cmd, &data, sizeof(data));
160	if (ret < 0)
161		return ret;
162
163	return data;
164}
165
166static int vl6180_read_word(struct i2c_client *client, u16 cmd)
167{
168	__be16 data;
169	int ret;
170
171	ret = vl6180_read(client, cmd, &data, sizeof(data));
172	if (ret < 0)
173		return ret;
174
175	return be16_to_cpu(data);
176}
177
178static int vl6180_write_byte(struct i2c_client *client, u16 cmd, u8 val)
179{
180	u8 buf[3];
181	struct i2c_msg msgs[1] = {
182		{ .addr = client->addr, .len = sizeof(buf), .buf = (u8 *) &buf } };
183	int ret;
184
185	buf[0] = cmd >> 8;
186	buf[1] = cmd & 0xff;
187	buf[2] = val;
188
189	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
190	if (ret < 0) {
191		dev_err(&client->dev, "failed writing register 0x%04x\n", cmd);
192		return ret;
193	}
194
195	return 0;
196}
197
198static int vl6180_write_word(struct i2c_client *client, u16 cmd, u16 val)
199{
200	__be16 buf[2];
201	struct i2c_msg msgs[1] = {
202		{ .addr = client->addr, .len = sizeof(buf), .buf = (u8 *) &buf } };
203	int ret;
204
205	buf[0] = cpu_to_be16(cmd);
206	buf[1] = cpu_to_be16(val);
207
208	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
209	if (ret < 0) {
210		dev_err(&client->dev, "failed writing register 0x%04x\n", cmd);
211		return ret;
212	}
213
214	return 0;
215}
216
217static int vl6180_measure(struct vl6180_data *data, int addr)
218{
219	struct i2c_client *client = data->client;
220	unsigned long time_left;
221	int tries = 20, ret;
222	u16 value;
223
224	mutex_lock(&data->lock);
225	reinit_completion(&data->completion);
226
227	/* Start single shot measurement */
228	ret = vl6180_write_byte(client,
229		vl6180_chan_regs_table[addr].start_reg, VL6180_STARTSTOP);
230	if (ret < 0)
231		goto fail;
232
233	if (client->irq) {
234		time_left = wait_for_completion_timeout(&data->completion, HZ / 10);
235		if (time_left == 0) {
236			ret = -ETIMEDOUT;
237			goto fail;
238		}
239	} else {
240		while (tries--) {
241			ret = vl6180_read_byte(client, VL6180_INTR_STATUS);
242			if (ret < 0)
243				goto fail;
244
245			if (ret & vl6180_chan_regs_table[addr].drdy_mask)
246				break;
247			msleep(20);
248		}
249
250		if (tries < 0) {
251			ret = -EIO;
252			goto fail;
253		}
254	}
255
256	/* Read result value from appropriate registers */
257	ret = vl6180_chan_regs_table[addr].word ?
258		vl6180_read_word(client, vl6180_chan_regs_table[addr].value_reg) :
259		vl6180_read_byte(client, vl6180_chan_regs_table[addr].value_reg);
260	if (ret < 0)
261		goto fail;
262	value = ret;
263
264	/* Clear the interrupt flag after data read */
265	ret = vl6180_write_byte(client, VL6180_INTR_CLEAR,
266		VL6180_CLEAR_ERROR | VL6180_CLEAR_ALS | VL6180_CLEAR_RANGE);
267	if (ret < 0)
268		goto fail;
269
270	ret = value;
271
272fail:
273	mutex_unlock(&data->lock);
274
275	return ret;
276}
277
278static const struct iio_chan_spec vl6180_channels[] = {
279	{
280		.type = IIO_LIGHT,
281		.address = VL6180_ALS,
282		.scan_index = VL6180_ALS,
283		.scan_type = {
284			.sign = 'u',
285			.realbits = 16,
286			.storagebits = 16,
287		},
288		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
289			BIT(IIO_CHAN_INFO_INT_TIME) |
290			BIT(IIO_CHAN_INFO_SCALE) |
291			BIT(IIO_CHAN_INFO_HARDWAREGAIN) |
292			BIT(IIO_CHAN_INFO_SAMP_FREQ),
293	}, {
294		.type = IIO_DISTANCE,
295		.address = VL6180_RANGE,
296		.scan_index = VL6180_RANGE,
297		.scan_type = {
298			.sign = 'u',
299			.realbits = 8,
300			.storagebits = 8,
301		},
302		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
303			BIT(IIO_CHAN_INFO_SCALE) |
304			BIT(IIO_CHAN_INFO_SAMP_FREQ),
305	}, {
306		.type = IIO_PROXIMITY,
307		.address = VL6180_PROX,
308		.scan_index = VL6180_PROX,
309		.scan_type = {
310			.sign = 'u',
311			.realbits = 16,
312			.storagebits = 16,
313		},
314		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
315	},
316	IIO_CHAN_SOFT_TIMESTAMP(3),
317};
318
319/*
320 * Available Ambient Light Sensor gain settings, 1/1000th, and
321 * corresponding setting for the VL6180_ALS_GAIN register
322 */
323static const int vl6180_als_gain_tab[8] = {
324	1000, 1250, 1670, 2500, 5000, 10000, 20000, 40000
325};
326static const u8 vl6180_als_gain_tab_bits[8] = {
327	VL6180_ALS_GAIN_1,    VL6180_ALS_GAIN_1_25,
328	VL6180_ALS_GAIN_1_67, VL6180_ALS_GAIN_2_5,
329	VL6180_ALS_GAIN_5,    VL6180_ALS_GAIN_10,
330	VL6180_ALS_GAIN_20,   VL6180_ALS_GAIN_40
331};
332
333static int vl6180_read_raw(struct iio_dev *indio_dev,
334				struct iio_chan_spec const *chan,
335				int *val, int *val2, long mask)
336{
337	struct vl6180_data *data = iio_priv(indio_dev);
338	int ret;
339
340	switch (mask) {
341	case IIO_CHAN_INFO_RAW:
342		ret = vl6180_measure(data, chan->address);
343		if (ret < 0)
344			return ret;
345		*val = ret;
346
347		return IIO_VAL_INT;
348	case IIO_CHAN_INFO_INT_TIME:
349		*val = data->als_it_ms;
350		*val2 = 1000;
351
352		return IIO_VAL_FRACTIONAL;
353
354	case IIO_CHAN_INFO_SCALE:
355		switch (chan->type) {
356		case IIO_LIGHT:
357			/* one ALS count is 0.32 Lux @ gain 1, IT 100 ms */
358			*val = 32000; /* 0.32 * 1000 * 100 */
359			*val2 = data->als_gain_milli * data->als_it_ms;
360
361			return IIO_VAL_FRACTIONAL;
362
363		case IIO_DISTANCE:
364			*val = 0; /* sensor reports mm, scale to meter */
365			*val2 = 1000;
366			break;
367		default:
368			return -EINVAL;
369		}
370
371		return IIO_VAL_INT_PLUS_MICRO;
372	case IIO_CHAN_INFO_HARDWAREGAIN:
373		*val = data->als_gain_milli;
374		*val2 = 1000;
375
376		return IIO_VAL_FRACTIONAL;
377
378	case IIO_CHAN_INFO_SAMP_FREQ:
379		switch (chan->type) {
380		case IIO_DISTANCE:
381			*val = data->range_meas_rate;
382			return IIO_VAL_INT;
383		case IIO_LIGHT:
384			*val = data->als_meas_rate;
385			return IIO_VAL_INT;
386		default:
387			return -EINVAL;
388		}
389
390	default:
391		return -EINVAL;
392	}
393}
394
395static IIO_CONST_ATTR(als_gain_available, "1 1.25 1.67 2.5 5 10 20 40");
396
397static struct attribute *vl6180_attributes[] = {
398	&iio_const_attr_als_gain_available.dev_attr.attr,
399	NULL
400};
401
402static const struct attribute_group vl6180_attribute_group = {
403	.attrs = vl6180_attributes,
404};
405
406/* HOLD is needed before updating any config registers */
407static int vl6180_hold(struct vl6180_data *data, bool hold)
408{
409	return vl6180_write_byte(data->client, VL6180_HOLD,
410		hold ? VL6180_HOLD_ON : 0);
411}
412
413static int vl6180_set_als_gain(struct vl6180_data *data, int val, int val2)
414{
415	int i, ret, gain;
416
417	if (val < 1 || val > 40)
418		return -EINVAL;
419
420	gain = (val * 1000000 + val2) / 1000;
421	if (gain < 1 || gain > 40000)
422		return -EINVAL;
423
424	i = find_closest(gain, vl6180_als_gain_tab,
425			 ARRAY_SIZE(vl6180_als_gain_tab));
426
427	mutex_lock(&data->lock);
428	ret = vl6180_hold(data, true);
429	if (ret < 0)
430		goto fail;
431
432	ret = vl6180_write_byte(data->client, VL6180_ALS_GAIN,
433				vl6180_als_gain_tab_bits[i]);
434
435	if (ret >= 0)
436		data->als_gain_milli = vl6180_als_gain_tab[i];
437
438fail:
439	vl6180_hold(data, false);
440	mutex_unlock(&data->lock);
441	return ret;
442}
443
444static int vl6180_set_it(struct vl6180_data *data, int val, int val2)
445{
446	int ret, it_ms;
447
448	it_ms = DIV_ROUND_CLOSEST(val2, 1000); /* round to ms */
449	if (val != 0 || it_ms < 1 || it_ms > 512)
450		return -EINVAL;
451
452	mutex_lock(&data->lock);
453	ret = vl6180_hold(data, true);
454	if (ret < 0)
455		goto fail;
456
457	ret = vl6180_write_word(data->client, VL6180_ALS_IT, it_ms - 1);
458
459	if (ret >= 0)
460		data->als_it_ms = it_ms;
461
462fail:
463	vl6180_hold(data, false);
464	mutex_unlock(&data->lock);
465
466	return ret;
467}
468
469static int vl6180_meas_reg_val_from_mhz(unsigned int mhz)
470{
471	unsigned int period = DIV_ROUND_CLOSEST(1000 * 1000, mhz);
472	unsigned int reg_val = 0;
473
474	if (period > 10)
475		reg_val = period < 2550 ? (DIV_ROUND_CLOSEST(period, 10) - 1) : 254;
476
477	return reg_val;
478}
479
480static int vl6180_write_raw(struct iio_dev *indio_dev,
481			     struct iio_chan_spec const *chan,
482			     int val, int val2, long mask)
483{
484	struct vl6180_data *data = iio_priv(indio_dev);
485	unsigned int reg_val;
486
487	switch (mask) {
488	case IIO_CHAN_INFO_INT_TIME:
489		return vl6180_set_it(data, val, val2);
490
491	case IIO_CHAN_INFO_HARDWAREGAIN:
492		if (chan->type != IIO_LIGHT)
493			return -EINVAL;
494
495		return vl6180_set_als_gain(data, val, val2);
496
497	case IIO_CHAN_INFO_SAMP_FREQ:
498	{
499		guard(mutex)(&data->lock);
500		switch (chan->type) {
501		case IIO_DISTANCE:
502			data->range_meas_rate = val;
503			reg_val = vl6180_meas_reg_val_from_mhz(val);
504			return vl6180_write_byte(data->client,
505				VL6180_RANGE_INTER_MEAS_TIME, reg_val);
506
507		case IIO_LIGHT:
508			data->als_meas_rate = val;
509			reg_val = vl6180_meas_reg_val_from_mhz(val);
510			return vl6180_write_byte(data->client,
511				VL6180_ALS_INTER_MEAS_TIME, reg_val);
512
513		default:
514			return -EINVAL;
515		}
516	}
517
518	default:
519		return -EINVAL;
520	}
521}
522
523static irqreturn_t vl6180_threaded_irq(int irq, void *priv)
524{
525	struct iio_dev *indio_dev = priv;
526	struct vl6180_data *data = iio_priv(indio_dev);
527
528	if (iio_buffer_enabled(indio_dev))
529		iio_trigger_poll_nested(indio_dev->trig);
530	else
531		complete(&data->completion);
532
533	return IRQ_HANDLED;
534}
535
536static irqreturn_t vl6180_trigger_handler(int irq, void *priv)
537{
538	struct iio_poll_func *pf = priv;
539	struct iio_dev *indio_dev = pf->indio_dev;
540	struct vl6180_data *data = iio_priv(indio_dev);
541	s64 time_ns = iio_get_time_ns(indio_dev);
542	int ret, bit, i = 0;
543	struct {
544		u16 chan[2];
545		aligned_s64 timestamp;
546	} scan = { };
547
548
549	iio_for_each_active_channel(indio_dev, bit) {
550		if (vl6180_chan_regs_table[bit].word)
551			ret = vl6180_read_word(data->client,
552				vl6180_chan_regs_table[bit].value_reg);
553		else
554			ret = vl6180_read_byte(data->client,
555				vl6180_chan_regs_table[bit].value_reg);
556
557		if (ret < 0) {
558			dev_err(&data->client->dev,
559				"failed to read from value regs: %d\n", ret);
560			return IRQ_HANDLED;
561		}
562
563		scan.chan[i++] = ret;
564	}
565
566	iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan), time_ns);
567	iio_trigger_notify_done(indio_dev->trig);
568
569	/* Clear the interrupt flag after data read */
570	ret = vl6180_write_byte(data->client, VL6180_INTR_CLEAR,
571		VL6180_CLEAR_ERROR | VL6180_CLEAR_ALS | VL6180_CLEAR_RANGE);
572	if (ret < 0)
573		dev_err(&data->client->dev, "failed to clear irq: %d\n", ret);
574
575	return IRQ_HANDLED;
576}
577
578static const struct iio_info vl6180_info = {
579	.read_raw = vl6180_read_raw,
580	.write_raw = vl6180_write_raw,
581	.attrs = &vl6180_attribute_group,
582	.validate_trigger = iio_validate_own_trigger,
583};
584
585static int vl6180_buffer_postenable(struct iio_dev *indio_dev)
586{
587	struct vl6180_data *data = iio_priv(indio_dev);
588	int bit;
589
590	iio_for_each_active_channel(indio_dev, bit)
591		return vl6180_write_byte(data->client,
592			vl6180_chan_regs_table[bit].start_reg,
593			VL6180_MODE_CONT | VL6180_STARTSTOP);
594
595	return -EINVAL;
596}
597
598static int vl6180_buffer_postdisable(struct iio_dev *indio_dev)
599{
600	struct vl6180_data *data = iio_priv(indio_dev);
601	int bit;
602
603	iio_for_each_active_channel(indio_dev, bit)
604		return vl6180_write_byte(data->client,
605			vl6180_chan_regs_table[bit].start_reg,
606			VL6180_STARTSTOP);
607
608	return -EINVAL;
609}
610
611static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {
612	.postenable = &vl6180_buffer_postenable,
613	.postdisable = &vl6180_buffer_postdisable,
614};
615
616static const struct iio_trigger_ops vl6180_trigger_ops = {
617	.validate_device = iio_trigger_validate_own_device,
618};
619
620static int vl6180_init(struct vl6180_data *data, struct iio_dev *indio_dev)
621{
622	struct i2c_client *client = data->client;
623	int ret;
624
625	ret = vl6180_read_byte(client, VL6180_MODEL_ID);
626	if (ret < 0)
627		return ret;
628
629	if (ret != VL6180_MODEL_ID_VAL) {
630		dev_err(&client->dev, "invalid model ID %02x\n", ret);
631		return -ENODEV;
632	}
633
634	ret = vl6180_hold(data, true);
635	if (ret < 0)
636		return ret;
637
638	ret = vl6180_read_byte(client, VL6180_OUT_OF_RESET);
639	if (ret < 0)
640		return ret;
641
642	/*
643	 * Detect false reset condition here. This bit is always set when the
644	 * system comes out of reset.
645	 */
646	if (ret != 0x01)
647		dev_info(&client->dev, "device is not fresh out of reset\n");
648
649	/* Enable ALS and Range ready interrupts */
650	ret = vl6180_write_byte(client, VL6180_INTR_CONFIG,
651				VL6180_ALS_READY | VL6180_RANGE_READY);
652	if (ret < 0)
653		return ret;
654
655	ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL,
656						&vl6180_trigger_handler,
657						&iio_triggered_buffer_setup_ops);
658	if (ret)
659		return ret;
660
661	/* Default Range inter-measurement time: 50ms or 20000 mHz */
662	ret = vl6180_write_byte(client, VL6180_RANGE_INTER_MEAS_TIME,
663				vl6180_meas_reg_val_from_mhz(20000));
664	if (ret < 0)
665		return ret;
666	data->range_meas_rate = 20000;
667
668	/* Default ALS inter-measurement time: 10ms or 100000 mHz */
669	ret = vl6180_write_byte(client, VL6180_ALS_INTER_MEAS_TIME,
670				vl6180_meas_reg_val_from_mhz(100000));
671	if (ret < 0)
672		return ret;
673	data->als_meas_rate = 100000;
674
675	/* ALS integration time: 100ms */
676	data->als_it_ms = 100;
677	ret = vl6180_write_word(client, VL6180_ALS_IT, VL6180_ALS_IT_100);
678	if (ret < 0)
679		return ret;
680
681	/* ALS gain: 1 */
682	data->als_gain_milli = 1000;
683	ret = vl6180_write_byte(client, VL6180_ALS_GAIN, VL6180_ALS_GAIN_1);
684	if (ret < 0)
685		return ret;
686
687	ret = vl6180_write_byte(client, VL6180_OUT_OF_RESET, 0x00);
688	if (ret < 0)
689		return ret;
690
691	return vl6180_hold(data, false);
692}
693
694static int vl6180_probe(struct i2c_client *client)
695{
696	struct vl6180_data *data;
697	struct iio_dev *indio_dev;
698	int ret;
699
700	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
701	if (!indio_dev)
702		return -ENOMEM;
703
704	data = iio_priv(indio_dev);
705	i2c_set_clientdata(client, indio_dev);
706	data->client = client;
707	mutex_init(&data->lock);
708
709	indio_dev->info = &vl6180_info;
710	indio_dev->channels = vl6180_channels;
711	indio_dev->num_channels = ARRAY_SIZE(vl6180_channels);
712	indio_dev->name = VL6180_DRV_NAME;
713	indio_dev->modes = INDIO_DIRECT_MODE;
714
715	ret = vl6180_init(data, indio_dev);
716	if (ret < 0)
717		return ret;
718
719	if (client->irq) {
720		ret = devm_request_threaded_irq(&client->dev, client->irq,
721						NULL, vl6180_threaded_irq,
722						IRQF_ONESHOT,
723						indio_dev->name, indio_dev);
724		if (ret)
725			return dev_err_probe(&client->dev, ret, "devm_request_irq error\n");
726
727		init_completion(&data->completion);
728
729		data->trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
730						indio_dev->name, iio_device_id(indio_dev));
731		if (!data->trig)
732			return -ENOMEM;
733
734		data->trig->ops = &vl6180_trigger_ops;
735		iio_trigger_set_drvdata(data->trig, indio_dev);
736		ret = devm_iio_trigger_register(&client->dev, data->trig);
737		if (ret)
738			return ret;
739
740		indio_dev->trig = iio_trigger_get(data->trig);
741	}
742
743	return devm_iio_device_register(&client->dev, indio_dev);
744}
745
746static const struct of_device_id vl6180_of_match[] = {
747	{ .compatible = "st,vl6180", },
748	{ }
749};
750MODULE_DEVICE_TABLE(of, vl6180_of_match);
751
752static const struct i2c_device_id vl6180_id[] = {
753	{ "vl6180" },
754	{ }
755};
756MODULE_DEVICE_TABLE(i2c, vl6180_id);
757
758static struct i2c_driver vl6180_driver = {
759	.driver = {
760		.name   = VL6180_DRV_NAME,
761		.of_match_table = vl6180_of_match,
762	},
763	.probe = vl6180_probe,
764	.id_table = vl6180_id,
765};
766
767module_i2c_driver(vl6180_driver);
768
769MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>");
770MODULE_AUTHOR("Manivannan Sadhasivam <manivannanece23@gmail.com>");
771MODULE_DESCRIPTION("STMicro VL6180 ALS, range and proximity sensor driver");
772MODULE_LICENSE("GPL");