1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * VCNL4035 Ambient Light and Proximity Sensor - 7-bit I2C slave address 0x60
4 *
5 * Copyright (c) 2018, DENX Software Engineering GmbH
6 * Author: Parthiban Nallathambi <pn@denx.de>
7 *
8 * TODO: Proximity
9 */
10 #include <linux/bitops.h>
11 #include <linux/i2c.h>
12 #include <linux/module.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/regmap.h>
15
16 #include <linux/iio/buffer.h>
17 #include <linux/iio/events.h>
18 #include <linux/iio/iio.h>
19 #include <linux/iio/sysfs.h>
20 #include <linux/iio/trigger.h>
21 #include <linux/iio/trigger_consumer.h>
22 #include <linux/iio/triggered_buffer.h>
23
24 #define VCNL4035_DRV_NAME "vcnl4035"
25 #define VCNL4035_IRQ_NAME "vcnl4035_event"
26 #define VCNL4035_REGMAP_NAME "vcnl4035_regmap"
27
28 /* Device registers */
29 #define VCNL4035_ALS_CONF 0x00
30 #define VCNL4035_ALS_THDH 0x01
31 #define VCNL4035_ALS_THDL 0x02
32 #define VCNL4035_ALS_DATA 0x0B
33 #define VCNL4035_WHITE_DATA 0x0C
34 #define VCNL4035_INT_FLAG 0x0D
35 #define VCNL4035_DEV_ID 0x0E
36
37 /* Register masks */
38 #define VCNL4035_MODE_ALS_MASK BIT(0)
39 #define VCNL4035_MODE_ALS_WHITE_CHAN BIT(8)
40 #define VCNL4035_MODE_ALS_INT_MASK BIT(1)
41 #define VCNL4035_ALS_IT_MASK GENMASK(7, 5)
42 #define VCNL4035_ALS_PERS_MASK GENMASK(3, 2)
43 #define VCNL4035_INT_ALS_IF_H_MASK BIT(12)
44 #define VCNL4035_INT_ALS_IF_L_MASK BIT(13)
45
46 /* Default values */
47 #define VCNL4035_MODE_ALS_ENABLE BIT(0)
48 #define VCNL4035_MODE_ALS_DISABLE 0x00
49 #define VCNL4035_MODE_ALS_INT_ENABLE BIT(1)
50 #define VCNL4035_MODE_ALS_INT_DISABLE 0
51 #define VCNL4035_DEV_ID_VAL 0x80
52 #define VCNL4035_ALS_IT_DEFAULT 0x01
53 #define VCNL4035_ALS_PERS_DEFAULT 0x00
54 #define VCNL4035_ALS_THDH_DEFAULT 5000
55 #define VCNL4035_ALS_THDL_DEFAULT 100
56 #define VCNL4035_SLEEP_DELAY_MS 2000
57
58 struct vcnl4035_data {
59 struct i2c_client *client;
60 struct regmap *regmap;
61 unsigned int als_it_val;
62 unsigned int als_persistence;
63 unsigned int als_thresh_low;
64 unsigned int als_thresh_high;
65 struct iio_trigger *drdy_trigger0;
66 };
67
vcnl4035_is_triggered(struct vcnl4035_data * data)68 static inline bool vcnl4035_is_triggered(struct vcnl4035_data *data)
69 {
70 int ret;
71 int reg;
72
73 ret = regmap_read(data->regmap, VCNL4035_INT_FLAG, ®);
74 if (ret < 0)
75 return false;
76
77 return !!(reg &
78 (VCNL4035_INT_ALS_IF_H_MASK | VCNL4035_INT_ALS_IF_L_MASK));
79 }
80
vcnl4035_drdy_irq_thread(int irq,void * private)81 static irqreturn_t vcnl4035_drdy_irq_thread(int irq, void *private)
82 {
83 struct iio_dev *indio_dev = private;
84 struct vcnl4035_data *data = iio_priv(indio_dev);
85
86 if (vcnl4035_is_triggered(data)) {
87 iio_push_event(indio_dev, IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
88 0,
89 IIO_EV_TYPE_THRESH,
90 IIO_EV_DIR_EITHER),
91 iio_get_time_ns(indio_dev));
92 iio_trigger_poll_chained(data->drdy_trigger0);
93 return IRQ_HANDLED;
94 }
95
96 return IRQ_NONE;
97 }
98
99 /* Triggered buffer */
vcnl4035_trigger_consumer_handler(int irq,void * p)100 static irqreturn_t vcnl4035_trigger_consumer_handler(int irq, void *p)
101 {
102 struct iio_poll_func *pf = p;
103 struct iio_dev *indio_dev = pf->indio_dev;
104 struct vcnl4035_data *data = iio_priv(indio_dev);
105 /* Ensure naturally aligned timestamp */
106 u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)] __aligned(8);
107 int ret;
108
109 ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, (int *)buffer);
110 if (ret < 0) {
111 dev_err(&data->client->dev,
112 "Trigger consumer can't read from sensor.\n");
113 goto fail_read;
114 }
115 iio_push_to_buffers_with_timestamp(indio_dev, buffer,
116 iio_get_time_ns(indio_dev));
117
118 fail_read:
119 iio_trigger_notify_done(indio_dev->trig);
120
121 return IRQ_HANDLED;
122 }
123
vcnl4035_als_drdy_set_state(struct iio_trigger * trigger,bool enable_drdy)124 static int vcnl4035_als_drdy_set_state(struct iio_trigger *trigger,
125 bool enable_drdy)
126 {
127 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger);
128 struct vcnl4035_data *data = iio_priv(indio_dev);
129 int val = enable_drdy ? VCNL4035_MODE_ALS_INT_ENABLE :
130 VCNL4035_MODE_ALS_INT_DISABLE;
131
132 return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,
133 VCNL4035_MODE_ALS_INT_MASK,
134 val);
135 }
136
137 static const struct iio_trigger_ops vcnl4035_trigger_ops = {
138 .validate_device = iio_trigger_validate_own_device,
139 .set_trigger_state = vcnl4035_als_drdy_set_state,
140 };
141
vcnl4035_set_pm_runtime_state(struct vcnl4035_data * data,bool on)142 static int vcnl4035_set_pm_runtime_state(struct vcnl4035_data *data, bool on)
143 {
144 int ret;
145 struct device *dev = &data->client->dev;
146
147 if (on) {
148 ret = pm_runtime_get_sync(dev);
149 if (ret < 0)
150 pm_runtime_put_noidle(dev);
151 } else {
152 pm_runtime_mark_last_busy(dev);
153 ret = pm_runtime_put_autosuspend(dev);
154 }
155
156 return ret;
157 }
158
159 /*
160 * Device IT INT Time (ms) Scale (lux/step)
161 * 000 50 0.064
162 * 001 100 0.032
163 * 010 200 0.016
164 * 100 400 0.008
165 * 101 - 111 800 0.004
166 * Values are proportional, so ALS INT is selected for input due to
167 * simplicity reason. Integration time value and scaling is
168 * calculated based on device INT value
169 *
170 * Raw value needs to be scaled using ALS steps
171 */
vcnl4035_read_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2,long mask)172 static int vcnl4035_read_raw(struct iio_dev *indio_dev,
173 struct iio_chan_spec const *chan, int *val,
174 int *val2, long mask)
175 {
176 struct vcnl4035_data *data = iio_priv(indio_dev);
177 int ret;
178 int raw_data;
179 unsigned int reg;
180
181 switch (mask) {
182 case IIO_CHAN_INFO_RAW:
183 ret = vcnl4035_set_pm_runtime_state(data, true);
184 if (ret < 0)
185 return ret;
186
187 ret = iio_device_claim_direct_mode(indio_dev);
188 if (!ret) {
189 if (chan->channel)
190 reg = VCNL4035_ALS_DATA;
191 else
192 reg = VCNL4035_WHITE_DATA;
193 ret = regmap_read(data->regmap, reg, &raw_data);
194 iio_device_release_direct_mode(indio_dev);
195 if (!ret) {
196 *val = raw_data;
197 ret = IIO_VAL_INT;
198 }
199 }
200 vcnl4035_set_pm_runtime_state(data, false);
201 return ret;
202 case IIO_CHAN_INFO_INT_TIME:
203 *val = 50;
204 if (data->als_it_val)
205 *val = data->als_it_val * 100;
206 return IIO_VAL_INT;
207 case IIO_CHAN_INFO_SCALE:
208 *val = 64;
209 if (!data->als_it_val)
210 *val2 = 1000;
211 else
212 *val2 = data->als_it_val * 2 * 1000;
213 return IIO_VAL_FRACTIONAL;
214 default:
215 return -EINVAL;
216 }
217 }
218
vcnl4035_write_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int val,int val2,long mask)219 static int vcnl4035_write_raw(struct iio_dev *indio_dev,
220 struct iio_chan_spec const *chan,
221 int val, int val2, long mask)
222 {
223 int ret;
224 struct vcnl4035_data *data = iio_priv(indio_dev);
225
226 switch (mask) {
227 case IIO_CHAN_INFO_INT_TIME:
228 if (val <= 0 || val > 800)
229 return -EINVAL;
230
231 ret = vcnl4035_set_pm_runtime_state(data, true);
232 if (ret < 0)
233 return ret;
234
235 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,
236 VCNL4035_ALS_IT_MASK,
237 val / 100);
238 if (!ret)
239 data->als_it_val = val / 100;
240
241 vcnl4035_set_pm_runtime_state(data, false);
242 return ret;
243 default:
244 return -EINVAL;
245 }
246 }
247
248 /* No direct ABI for persistence and threshold, so eventing */
vcnl4035_read_thresh(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,enum iio_event_info info,int * val,int * val2)249 static int vcnl4035_read_thresh(struct iio_dev *indio_dev,
250 const struct iio_chan_spec *chan, enum iio_event_type type,
251 enum iio_event_direction dir, enum iio_event_info info,
252 int *val, int *val2)
253 {
254 struct vcnl4035_data *data = iio_priv(indio_dev);
255
256 switch (info) {
257 case IIO_EV_INFO_VALUE:
258 switch (dir) {
259 case IIO_EV_DIR_RISING:
260 *val = data->als_thresh_high;
261 return IIO_VAL_INT;
262 case IIO_EV_DIR_FALLING:
263 *val = data->als_thresh_low;
264 return IIO_VAL_INT;
265 default:
266 return -EINVAL;
267 }
268 break;
269 case IIO_EV_INFO_PERIOD:
270 *val = data->als_persistence;
271 return IIO_VAL_INT;
272 default:
273 return -EINVAL;
274 }
275
276 }
277
vcnl4035_write_thresh(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,enum iio_event_info info,int val,int val2)278 static int vcnl4035_write_thresh(struct iio_dev *indio_dev,
279 const struct iio_chan_spec *chan, enum iio_event_type type,
280 enum iio_event_direction dir, enum iio_event_info info, int val,
281 int val2)
282 {
283 struct vcnl4035_data *data = iio_priv(indio_dev);
284 int ret;
285
286 switch (info) {
287 case IIO_EV_INFO_VALUE:
288 /* 16 bit threshold range 0 - 65535 */
289 if (val < 0 || val > 65535)
290 return -EINVAL;
291 if (dir == IIO_EV_DIR_RISING) {
292 if (val < data->als_thresh_low)
293 return -EINVAL;
294 ret = regmap_write(data->regmap, VCNL4035_ALS_THDH,
295 val);
296 if (ret)
297 return ret;
298 data->als_thresh_high = val;
299 } else {
300 if (val > data->als_thresh_high)
301 return -EINVAL;
302 ret = regmap_write(data->regmap, VCNL4035_ALS_THDL,
303 val);
304 if (ret)
305 return ret;
306 data->als_thresh_low = val;
307 }
308 return ret;
309 case IIO_EV_INFO_PERIOD:
310 /* allow only 1 2 4 8 as persistence value */
311 if (val < 0 || val > 8 || hweight8(val) != 1)
312 return -EINVAL;
313 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,
314 VCNL4035_ALS_PERS_MASK, val);
315 if (!ret)
316 data->als_persistence = val;
317 return ret;
318 default:
319 return -EINVAL;
320 }
321 }
322
323 static IIO_CONST_ATTR_INT_TIME_AVAIL("50 100 200 400 800");
324
325 static struct attribute *vcnl4035_attributes[] = {
326 &iio_const_attr_integration_time_available.dev_attr.attr,
327 NULL,
328 };
329
330 static const struct attribute_group vcnl4035_attribute_group = {
331 .attrs = vcnl4035_attributes,
332 };
333
334 static const struct iio_info vcnl4035_info = {
335 .read_raw = vcnl4035_read_raw,
336 .write_raw = vcnl4035_write_raw,
337 .read_event_value = vcnl4035_read_thresh,
338 .write_event_value = vcnl4035_write_thresh,
339 .attrs = &vcnl4035_attribute_group,
340 };
341
342 static const struct iio_event_spec vcnl4035_event_spec[] = {
343 {
344 .type = IIO_EV_TYPE_THRESH,
345 .dir = IIO_EV_DIR_RISING,
346 .mask_separate = BIT(IIO_EV_INFO_VALUE),
347 }, {
348 .type = IIO_EV_TYPE_THRESH,
349 .dir = IIO_EV_DIR_FALLING,
350 .mask_separate = BIT(IIO_EV_INFO_VALUE),
351 }, {
352 .type = IIO_EV_TYPE_THRESH,
353 .dir = IIO_EV_DIR_EITHER,
354 .mask_separate = BIT(IIO_EV_INFO_PERIOD),
355 },
356 };
357
358 enum vcnl4035_scan_index_order {
359 VCNL4035_CHAN_INDEX_LIGHT,
360 VCNL4035_CHAN_INDEX_WHITE_LED,
361 };
362
363 static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {
364 .validate_scan_mask = &iio_validate_scan_mask_onehot,
365 };
366
367 static const struct iio_chan_spec vcnl4035_channels[] = {
368 {
369 .type = IIO_LIGHT,
370 .channel = 0,
371 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
372 BIT(IIO_CHAN_INFO_INT_TIME) |
373 BIT(IIO_CHAN_INFO_SCALE),
374 .event_spec = vcnl4035_event_spec,
375 .num_event_specs = ARRAY_SIZE(vcnl4035_event_spec),
376 .scan_index = VCNL4035_CHAN_INDEX_LIGHT,
377 .scan_type = {
378 .sign = 'u',
379 .realbits = 16,
380 .storagebits = 16,
381 .endianness = IIO_LE,
382 },
383 },
384 {
385 .type = IIO_INTENSITY,
386 .channel = 1,
387 .modified = 1,
388 .channel2 = IIO_MOD_LIGHT_BOTH,
389 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
390 .scan_index = VCNL4035_CHAN_INDEX_WHITE_LED,
391 .scan_type = {
392 .sign = 'u',
393 .realbits = 16,
394 .storagebits = 16,
395 .endianness = IIO_LE,
396 },
397 },
398 };
399
vcnl4035_set_als_power_state(struct vcnl4035_data * data,u8 status)400 static int vcnl4035_set_als_power_state(struct vcnl4035_data *data, u8 status)
401 {
402 return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,
403 VCNL4035_MODE_ALS_MASK,
404 status);
405 }
406
vcnl4035_init(struct vcnl4035_data * data)407 static int vcnl4035_init(struct vcnl4035_data *data)
408 {
409 int ret;
410 int id;
411
412 ret = regmap_read(data->regmap, VCNL4035_DEV_ID, &id);
413 if (ret < 0) {
414 dev_err(&data->client->dev, "Failed to read DEV_ID register\n");
415 return ret;
416 }
417
418 if (id != VCNL4035_DEV_ID_VAL) {
419 dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n",
420 id, VCNL4035_DEV_ID_VAL);
421 return -ENODEV;
422 }
423
424 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE);
425 if (ret < 0)
426 return ret;
427
428 /* ALS white channel enable */
429 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,
430 VCNL4035_MODE_ALS_WHITE_CHAN,
431 1);
432 if (ret) {
433 dev_err(&data->client->dev, "set white channel enable %d\n",
434 ret);
435 return ret;
436 }
437
438 /* set default integration time - 100 ms for ALS */
439 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,
440 VCNL4035_ALS_IT_MASK,
441 VCNL4035_ALS_IT_DEFAULT);
442 if (ret) {
443 dev_err(&data->client->dev, "set default ALS IT returned %d\n",
444 ret);
445 return ret;
446 }
447 data->als_it_val = VCNL4035_ALS_IT_DEFAULT;
448
449 /* set default persistence time - 1 for ALS */
450 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,
451 VCNL4035_ALS_PERS_MASK,
452 VCNL4035_ALS_PERS_DEFAULT);
453 if (ret) {
454 dev_err(&data->client->dev, "set default PERS returned %d\n",
455 ret);
456 return ret;
457 }
458 data->als_persistence = VCNL4035_ALS_PERS_DEFAULT;
459
460 /* set default HIGH threshold for ALS */
461 ret = regmap_write(data->regmap, VCNL4035_ALS_THDH,
462 VCNL4035_ALS_THDH_DEFAULT);
463 if (ret) {
464 dev_err(&data->client->dev, "set default THDH returned %d\n",
465 ret);
466 return ret;
467 }
468 data->als_thresh_high = VCNL4035_ALS_THDH_DEFAULT;
469
470 /* set default LOW threshold for ALS */
471 ret = regmap_write(data->regmap, VCNL4035_ALS_THDL,
472 VCNL4035_ALS_THDL_DEFAULT);
473 if (ret) {
474 dev_err(&data->client->dev, "set default THDL returned %d\n",
475 ret);
476 return ret;
477 }
478 data->als_thresh_low = VCNL4035_ALS_THDL_DEFAULT;
479
480 return 0;
481 }
482
vcnl4035_is_volatile_reg(struct device * dev,unsigned int reg)483 static bool vcnl4035_is_volatile_reg(struct device *dev, unsigned int reg)
484 {
485 switch (reg) {
486 case VCNL4035_ALS_CONF:
487 case VCNL4035_DEV_ID:
488 return false;
489 default:
490 return true;
491 }
492 }
493
494 static const struct regmap_config vcnl4035_regmap_config = {
495 .name = VCNL4035_REGMAP_NAME,
496 .reg_bits = 8,
497 .val_bits = 16,
498 .max_register = VCNL4035_DEV_ID,
499 .cache_type = REGCACHE_RBTREE,
500 .volatile_reg = vcnl4035_is_volatile_reg,
501 .val_format_endian = REGMAP_ENDIAN_LITTLE,
502 };
503
vcnl4035_probe_trigger(struct iio_dev * indio_dev)504 static int vcnl4035_probe_trigger(struct iio_dev *indio_dev)
505 {
506 int ret;
507 struct vcnl4035_data *data = iio_priv(indio_dev);
508
509 data->drdy_trigger0 = devm_iio_trigger_alloc(
510 indio_dev->dev.parent,
511 "%s-dev%d", indio_dev->name, indio_dev->id);
512 if (!data->drdy_trigger0)
513 return -ENOMEM;
514
515 data->drdy_trigger0->dev.parent = indio_dev->dev.parent;
516 data->drdy_trigger0->ops = &vcnl4035_trigger_ops;
517 iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev);
518 ret = devm_iio_trigger_register(indio_dev->dev.parent,
519 data->drdy_trigger0);
520 if (ret) {
521 dev_err(&data->client->dev, "iio trigger register failed\n");
522 return ret;
523 }
524
525 /* Trigger setup */
526 ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
527 NULL, vcnl4035_trigger_consumer_handler,
528 &iio_triggered_buffer_setup_ops);
529 if (ret < 0) {
530 dev_err(&data->client->dev, "iio triggered buffer setup failed\n");
531 return ret;
532 }
533
534 /* IRQ to trigger mapping */
535 ret = devm_request_threaded_irq(&data->client->dev, data->client->irq,
536 NULL, vcnl4035_drdy_irq_thread,
537 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
538 VCNL4035_IRQ_NAME, indio_dev);
539 if (ret < 0)
540 dev_err(&data->client->dev, "request irq %d for trigger0 failed\n",
541 data->client->irq);
542 return ret;
543 }
544
vcnl4035_probe(struct i2c_client * client,const struct i2c_device_id * id)545 static int vcnl4035_probe(struct i2c_client *client,
546 const struct i2c_device_id *id)
547 {
548 struct vcnl4035_data *data;
549 struct iio_dev *indio_dev;
550 struct regmap *regmap;
551 int ret;
552
553 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
554 if (!indio_dev)
555 return -ENOMEM;
556
557 regmap = devm_regmap_init_i2c(client, &vcnl4035_regmap_config);
558 if (IS_ERR(regmap)) {
559 dev_err(&client->dev, "regmap_init failed!\n");
560 return PTR_ERR(regmap);
561 }
562
563 data = iio_priv(indio_dev);
564 i2c_set_clientdata(client, indio_dev);
565 data->client = client;
566 data->regmap = regmap;
567
568 indio_dev->info = &vcnl4035_info;
569 indio_dev->name = VCNL4035_DRV_NAME;
570 indio_dev->channels = vcnl4035_channels;
571 indio_dev->num_channels = ARRAY_SIZE(vcnl4035_channels);
572 indio_dev->modes = INDIO_DIRECT_MODE;
573
574 ret = vcnl4035_init(data);
575 if (ret < 0) {
576 dev_err(&client->dev, "vcnl4035 chip init failed\n");
577 return ret;
578 }
579
580 if (client->irq > 0) {
581 ret = vcnl4035_probe_trigger(indio_dev);
582 if (ret < 0) {
583 dev_err(&client->dev, "vcnl4035 unable init trigger\n");
584 goto fail_poweroff;
585 }
586 }
587
588 ret = pm_runtime_set_active(&client->dev);
589 if (ret < 0)
590 goto fail_poweroff;
591
592 ret = iio_device_register(indio_dev);
593 if (ret < 0)
594 goto fail_poweroff;
595
596 pm_runtime_enable(&client->dev);
597 pm_runtime_set_autosuspend_delay(&client->dev, VCNL4035_SLEEP_DELAY_MS);
598 pm_runtime_use_autosuspend(&client->dev);
599
600 return 0;
601
602 fail_poweroff:
603 vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE);
604 return ret;
605 }
606
vcnl4035_remove(struct i2c_client * client)607 static int vcnl4035_remove(struct i2c_client *client)
608 {
609 struct iio_dev *indio_dev = i2c_get_clientdata(client);
610
611 pm_runtime_dont_use_autosuspend(&client->dev);
612 pm_runtime_disable(&client->dev);
613 iio_device_unregister(indio_dev);
614 pm_runtime_set_suspended(&client->dev);
615
616 return vcnl4035_set_als_power_state(iio_priv(indio_dev),
617 VCNL4035_MODE_ALS_DISABLE);
618 }
619
vcnl4035_runtime_suspend(struct device * dev)620 static int __maybe_unused vcnl4035_runtime_suspend(struct device *dev)
621 {
622 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
623 struct vcnl4035_data *data = iio_priv(indio_dev);
624 int ret;
625
626 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE);
627 regcache_mark_dirty(data->regmap);
628
629 return ret;
630 }
631
vcnl4035_runtime_resume(struct device * dev)632 static int __maybe_unused vcnl4035_runtime_resume(struct device *dev)
633 {
634 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
635 struct vcnl4035_data *data = iio_priv(indio_dev);
636 int ret;
637
638 regcache_sync(data->regmap);
639 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE);
640 if (ret < 0)
641 return ret;
642
643 /* wait for 1 ALS integration cycle */
644 msleep(data->als_it_val * 100);
645
646 return 0;
647 }
648
649 static const struct dev_pm_ops vcnl4035_pm_ops = {
650 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
651 pm_runtime_force_resume)
652 SET_RUNTIME_PM_OPS(vcnl4035_runtime_suspend,
653 vcnl4035_runtime_resume, NULL)
654 };
655
656 static const struct of_device_id vcnl4035_of_match[] = {
657 { .compatible = "vishay,vcnl4035", },
658 { }
659 };
660 MODULE_DEVICE_TABLE(of, vcnl4035_of_match);
661
662 static struct i2c_driver vcnl4035_driver = {
663 .driver = {
664 .name = VCNL4035_DRV_NAME,
665 .pm = &vcnl4035_pm_ops,
666 .of_match_table = vcnl4035_of_match,
667 },
668 .probe = vcnl4035_probe,
669 .remove = vcnl4035_remove,
670 };
671
672 module_i2c_driver(vcnl4035_driver);
673
674 MODULE_AUTHOR("Parthiban Nallathambi <pn@denx.de>");
675 MODULE_DESCRIPTION("VCNL4035 Ambient Light Sensor driver");
676 MODULE_LICENSE("GPL v2");
677