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10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/acpi.h>
13#include <linux/delay.h>
14#include <linux/i2c.h>
15#include <linux/iio/events.h>
16#include <linux/iio/iio.h>
17#include <linux/interrupt.h>
18#include <linux/irq.h>
19#include <linux/iio/sysfs.h>
20#include <linux/mutex.h>
21#include <linux/pm.h>
22#include <linux/pm_runtime.h>
23
24#define US5182D_REG_CFG0 0x00
25#define US5182D_CFG0_ONESHOT_EN BIT(6)
26#define US5182D_CFG0_SHUTDOWN_EN BIT(7)
27#define US5182D_CFG0_WORD_ENABLE BIT(0)
28#define US5182D_CFG0_PROX BIT(3)
29#define US5182D_CFG0_PX_IRQ BIT(2)
30
31#define US5182D_REG_CFG1 0x01
32#define US5182D_CFG1_ALS_RES16 BIT(4)
33#define US5182D_CFG1_AGAIN_DEFAULT 0x00
34
35#define US5182D_REG_CFG2 0x02
36#define US5182D_CFG2_PX_RES16 BIT(4)
37#define US5182D_CFG2_PXGAIN_DEFAULT BIT(2)
38
39#define US5182D_REG_CFG3 0x03
40#define US5182D_CFG3_LED_CURRENT100 (BIT(4) | BIT(5))
41#define US5182D_CFG3_INT_SOURCE_PX BIT(3)
42
43#define US5182D_REG_CFG4 0x10
44
45
46
47
48
49
50
51#define US5182D_REG_UDARK_TH 0x27
52#define US5182D_REG_DARK_AUTO_EN 0x2b
53#define US5182D_REG_AUTO_LDARK_GAIN 0x29
54#define US5182D_REG_AUTO_HDARK_GAIN 0x2a
55
56
57#define US5182D_REG_PXL_TH 0x08
58#define US5182D_REG_PXH_TH 0x0a
59
60#define US5182D_REG_PXL_TH_DEFAULT 1000
61#define US5182D_REG_PXH_TH_DEFAULT 30000
62
63#define US5182D_OPMODE_ALS 0x01
64#define US5182D_OPMODE_PX 0x02
65#define US5182D_OPMODE_SHIFT 4
66
67#define US5182D_REG_DARK_AUTO_EN_DEFAULT 0x80
68#define US5182D_REG_AUTO_LDARK_GAIN_DEFAULT 0x16
69#define US5182D_REG_AUTO_HDARK_GAIN_DEFAULT 0x00
70
71#define US5182D_REG_ADL 0x0c
72#define US5182D_REG_PDL 0x0e
73
74#define US5182D_REG_MODE_STORE 0x21
75#define US5182D_STORE_MODE 0x01
76
77#define US5182D_REG_CHIPID 0xb2
78
79#define US5182D_OPMODE_MASK GENMASK(5, 4)
80#define US5182D_AGAIN_MASK 0x07
81#define US5182D_RESET_CHIP 0x01
82
83#define US5182D_CHIPID 0x26
84#define US5182D_DRV_NAME "us5182d"
85
86#define US5182D_GA_RESOLUTION 1000
87
88#define US5182D_READ_BYTE 1
89#define US5182D_READ_WORD 2
90#define US5182D_OPSTORE_SLEEP_TIME 20
91#define US5182D_SLEEP_MS 3000
92#define US5182D_PXH_TH_DISABLE 0xffff
93#define US5182D_PXL_TH_DISABLE 0x0000
94
95
96static const int us5182d_scales[] = {188500, 107800, 61000, 33600, 19600, 7600,
97 3900, 2100};
98
99
100
101
102
103static u16 us5182d_dark_ths_vals[] = {170, 200, 512, 512, 800, 2000, 4000,
104 8000};
105
106enum mode {
107 US5182D_ALS_PX,
108 US5182D_ALS_ONLY,
109 US5182D_PX_ONLY
110};
111
112enum pmode {
113 US5182D_CONTINUOUS,
114 US5182D_ONESHOT
115};
116
117struct us5182d_data {
118 struct i2c_client *client;
119 struct mutex lock;
120
121
122 u32 ga;
123
124
125 u8 lower_dark_gain;
126 u8 upper_dark_gain;
127 u16 *us5182d_dark_ths;
128
129 u16 px_low_th;
130 u16 px_high_th;
131
132 int rising_en;
133 int falling_en;
134
135 u8 opmode;
136 u8 power_mode;
137
138 bool als_enabled;
139 bool px_enabled;
140
141 bool default_continuous;
142};
143
144static IIO_CONST_ATTR(in_illuminance_scale_available,
145 "0.0021 0.0039 0.0076 0.0196 0.0336 0.061 0.1078 0.1885");
146
147static struct attribute *us5182d_attrs[] = {
148 &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
149 NULL
150};
151
152static const struct attribute_group us5182d_attr_group = {
153 .attrs = us5182d_attrs,
154};
155
156static const struct {
157 u8 reg;
158 u8 val;
159} us5182d_regvals[] = {
160 {US5182D_REG_CFG0, US5182D_CFG0_WORD_ENABLE},
161 {US5182D_REG_CFG1, US5182D_CFG1_ALS_RES16},
162 {US5182D_REG_CFG2, (US5182D_CFG2_PX_RES16 |
163 US5182D_CFG2_PXGAIN_DEFAULT)},
164 {US5182D_REG_CFG3, US5182D_CFG3_LED_CURRENT100 |
165 US5182D_CFG3_INT_SOURCE_PX},
166 {US5182D_REG_CFG4, 0x00},
167};
168
169static const struct iio_event_spec us5182d_events[] = {
170 {
171 .type = IIO_EV_TYPE_THRESH,
172 .dir = IIO_EV_DIR_RISING,
173 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
174 BIT(IIO_EV_INFO_ENABLE),
175 },
176 {
177 .type = IIO_EV_TYPE_THRESH,
178 .dir = IIO_EV_DIR_FALLING,
179 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
180 BIT(IIO_EV_INFO_ENABLE),
181 },
182};
183
184static const struct iio_chan_spec us5182d_channels[] = {
185 {
186 .type = IIO_LIGHT,
187 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
188 BIT(IIO_CHAN_INFO_SCALE),
189 },
190 {
191 .type = IIO_PROXIMITY,
192 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
193 .event_spec = us5182d_events,
194 .num_event_specs = ARRAY_SIZE(us5182d_events),
195 }
196};
197
198static int us5182d_oneshot_en(struct us5182d_data *data)
199{
200 int ret;
201
202 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
203 if (ret < 0)
204 return ret;
205
206
207
208
209
210 ret = ret | US5182D_CFG0_ONESHOT_EN;
211
212 return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
213}
214
215static int us5182d_set_opmode(struct us5182d_data *data, u8 mode)
216{
217 int ret;
218
219 if (mode == data->opmode)
220 return 0;
221
222 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
223 if (ret < 0)
224 return ret;
225
226
227 ret = ret & ~US5182D_OPMODE_MASK;
228 ret = ret | (mode << US5182D_OPMODE_SHIFT);
229
230
231
232
233
234
235 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
236 if (ret < 0)
237 return ret;
238
239 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_MODE_STORE,
240 US5182D_STORE_MODE);
241 if (ret < 0)
242 return ret;
243
244 data->opmode = mode;
245 msleep(US5182D_OPSTORE_SLEEP_TIME);
246
247 return 0;
248}
249
250static int us5182d_als_enable(struct us5182d_data *data)
251{
252 int ret;
253 u8 mode;
254
255 if (data->power_mode == US5182D_ONESHOT) {
256 ret = us5182d_set_opmode(data, US5182D_ALS_ONLY);
257 if (ret < 0)
258 return ret;
259 data->px_enabled = false;
260 }
261
262 if (data->als_enabled)
263 return 0;
264
265 mode = data->px_enabled ? US5182D_ALS_PX : US5182D_ALS_ONLY;
266
267 ret = us5182d_set_opmode(data, mode);
268 if (ret < 0)
269 return ret;
270
271 data->als_enabled = true;
272
273 return 0;
274}
275
276static int us5182d_px_enable(struct us5182d_data *data)
277{
278 int ret;
279 u8 mode;
280
281 if (data->power_mode == US5182D_ONESHOT) {
282 ret = us5182d_set_opmode(data, US5182D_PX_ONLY);
283 if (ret < 0)
284 return ret;
285 data->als_enabled = false;
286 }
287
288 if (data->px_enabled)
289 return 0;
290
291 mode = data->als_enabled ? US5182D_ALS_PX : US5182D_PX_ONLY;
292
293 ret = us5182d_set_opmode(data, mode);
294 if (ret < 0)
295 return ret;
296
297 data->px_enabled = true;
298
299 return 0;
300}
301
302static int us5182d_get_als(struct us5182d_data *data)
303{
304 int ret;
305 unsigned long result;
306
307 ret = us5182d_als_enable(data);
308 if (ret < 0)
309 return ret;
310
311 ret = i2c_smbus_read_word_data(data->client,
312 US5182D_REG_ADL);
313 if (ret < 0)
314 return ret;
315
316 result = ret * data->ga / US5182D_GA_RESOLUTION;
317 if (result > 0xffff)
318 result = 0xffff;
319
320 return result;
321}
322
323static int us5182d_get_px(struct us5182d_data *data)
324{
325 int ret;
326
327 ret = us5182d_px_enable(data);
328 if (ret < 0)
329 return ret;
330
331 return i2c_smbus_read_word_data(data->client,
332 US5182D_REG_PDL);
333}
334
335static int us5182d_shutdown_en(struct us5182d_data *data, u8 state)
336{
337 int ret;
338
339 if (data->power_mode == US5182D_ONESHOT)
340 return 0;
341
342 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
343 if (ret < 0)
344 return ret;
345
346 ret = ret & ~US5182D_CFG0_SHUTDOWN_EN;
347 ret = ret | state;
348
349 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
350 if (ret < 0)
351 return ret;
352
353 if (state & US5182D_CFG0_SHUTDOWN_EN) {
354 data->als_enabled = false;
355 data->px_enabled = false;
356 }
357
358 return ret;
359}
360
361
362static int us5182d_set_power_state(struct us5182d_data *data, bool on)
363{
364 int ret;
365
366 if (data->power_mode == US5182D_ONESHOT)
367 return 0;
368
369 if (on) {
370 ret = pm_runtime_get_sync(&data->client->dev);
371 if (ret < 0)
372 pm_runtime_put_noidle(&data->client->dev);
373 } else {
374 pm_runtime_mark_last_busy(&data->client->dev);
375 ret = pm_runtime_put_autosuspend(&data->client->dev);
376 }
377
378 return ret;
379}
380
381static int us5182d_read_value(struct us5182d_data *data,
382 struct iio_chan_spec const *chan)
383{
384 int ret, value;
385
386 mutex_lock(&data->lock);
387
388 if (data->power_mode == US5182D_ONESHOT) {
389 ret = us5182d_oneshot_en(data);
390 if (ret < 0)
391 goto out_err;
392 }
393
394 ret = us5182d_set_power_state(data, true);
395 if (ret < 0)
396 goto out_err;
397
398 if (chan->type == IIO_LIGHT)
399 ret = us5182d_get_als(data);
400 else
401 ret = us5182d_get_px(data);
402 if (ret < 0)
403 goto out_poweroff;
404
405 value = ret;
406
407 ret = us5182d_set_power_state(data, false);
408 if (ret < 0)
409 goto out_err;
410
411 mutex_unlock(&data->lock);
412 return value;
413
414out_poweroff:
415 us5182d_set_power_state(data, false);
416out_err:
417 mutex_unlock(&data->lock);
418 return ret;
419}
420
421static int us5182d_read_raw(struct iio_dev *indio_dev,
422 struct iio_chan_spec const *chan, int *val,
423 int *val2, long mask)
424{
425 struct us5182d_data *data = iio_priv(indio_dev);
426 int ret;
427
428 switch (mask) {
429 case IIO_CHAN_INFO_RAW:
430 ret = us5182d_read_value(data, chan);
431 if (ret < 0)
432 return ret;
433 *val = ret;
434 return IIO_VAL_INT;
435 case IIO_CHAN_INFO_SCALE:
436 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
437 if (ret < 0)
438 return ret;
439 *val = 0;
440 *val2 = us5182d_scales[ret & US5182D_AGAIN_MASK];
441 return IIO_VAL_INT_PLUS_MICRO;
442 default:
443 return -EINVAL;
444 }
445}
446
447
448
449
450
451
452
453
454
455
456static int us5182d_update_dark_th(struct us5182d_data *data, int index)
457{
458 __be16 dark_th = cpu_to_be16(data->us5182d_dark_ths[index]);
459 int ret;
460
461 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH,
462 ((u8 *)&dark_th)[0]);
463 if (ret < 0)
464 return ret;
465
466 return i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH + 1,
467 ((u8 *)&dark_th)[1]);
468}
469
470
471
472
473
474
475
476
477
478static int us5182d_apply_scale(struct us5182d_data *data, int index)
479{
480 int ret;
481
482 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
483 if (ret < 0)
484 return ret;
485
486 ret = ret & (~US5182D_AGAIN_MASK);
487 ret |= index;
488
489 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG1, ret);
490 if (ret < 0)
491 return ret;
492
493 return us5182d_update_dark_th(data, index);
494}
495
496static int us5182d_write_raw(struct iio_dev *indio_dev,
497 struct iio_chan_spec const *chan, int val,
498 int val2, long mask)
499{
500 struct us5182d_data *data = iio_priv(indio_dev);
501 int ret, i;
502
503 switch (mask) {
504 case IIO_CHAN_INFO_SCALE:
505 if (val != 0)
506 return -EINVAL;
507 for (i = 0; i < ARRAY_SIZE(us5182d_scales); i++)
508 if (val2 == us5182d_scales[i]) {
509 mutex_lock(&data->lock);
510 ret = us5182d_apply_scale(data, i);
511 mutex_unlock(&data->lock);
512 return ret;
513 }
514 break;
515 default:
516 return -EINVAL;
517 }
518
519 return -EINVAL;
520}
521
522static int us5182d_setup_prox(struct iio_dev *indio_dev,
523 enum iio_event_direction dir, u16 val)
524{
525 struct us5182d_data *data = iio_priv(indio_dev);
526
527 if (dir == IIO_EV_DIR_FALLING)
528 return i2c_smbus_write_word_data(data->client,
529 US5182D_REG_PXL_TH, val);
530 else if (dir == IIO_EV_DIR_RISING)
531 return i2c_smbus_write_word_data(data->client,
532 US5182D_REG_PXH_TH, val);
533
534 return 0;
535}
536
537static int us5182d_read_thresh(struct iio_dev *indio_dev,
538 const struct iio_chan_spec *chan, enum iio_event_type type,
539 enum iio_event_direction dir, enum iio_event_info info, int *val,
540 int *val2)
541{
542 struct us5182d_data *data = iio_priv(indio_dev);
543
544 switch (dir) {
545 case IIO_EV_DIR_RISING:
546 mutex_lock(&data->lock);
547 *val = data->px_high_th;
548 mutex_unlock(&data->lock);
549 break;
550 case IIO_EV_DIR_FALLING:
551 mutex_lock(&data->lock);
552 *val = data->px_low_th;
553 mutex_unlock(&data->lock);
554 break;
555 default:
556 return -EINVAL;
557 }
558
559 return IIO_VAL_INT;
560}
561
562static int us5182d_write_thresh(struct iio_dev *indio_dev,
563 const struct iio_chan_spec *chan, enum iio_event_type type,
564 enum iio_event_direction dir, enum iio_event_info info, int val,
565 int val2)
566{
567 struct us5182d_data *data = iio_priv(indio_dev);
568 int ret;
569
570 if (val < 0 || val > USHRT_MAX || val2 != 0)
571 return -EINVAL;
572
573 switch (dir) {
574 case IIO_EV_DIR_RISING:
575 mutex_lock(&data->lock);
576 if (data->rising_en) {
577 ret = us5182d_setup_prox(indio_dev, dir, val);
578 if (ret < 0)
579 goto err;
580 }
581 data->px_high_th = val;
582 mutex_unlock(&data->lock);
583 break;
584 case IIO_EV_DIR_FALLING:
585 mutex_lock(&data->lock);
586 if (data->falling_en) {
587 ret = us5182d_setup_prox(indio_dev, dir, val);
588 if (ret < 0)
589 goto err;
590 }
591 data->px_low_th = val;
592 mutex_unlock(&data->lock);
593 break;
594 default:
595 return -EINVAL;
596 }
597
598 return 0;
599err:
600 mutex_unlock(&data->lock);
601 return ret;
602}
603
604static int us5182d_read_event_config(struct iio_dev *indio_dev,
605 const struct iio_chan_spec *chan, enum iio_event_type type,
606 enum iio_event_direction dir)
607{
608 struct us5182d_data *data = iio_priv(indio_dev);
609 int ret;
610
611 switch (dir) {
612 case IIO_EV_DIR_RISING:
613 mutex_lock(&data->lock);
614 ret = data->rising_en;
615 mutex_unlock(&data->lock);
616 break;
617 case IIO_EV_DIR_FALLING:
618 mutex_lock(&data->lock);
619 ret = data->falling_en;
620 mutex_unlock(&data->lock);
621 break;
622 default:
623 ret = -EINVAL;
624 break;
625 }
626
627 return ret;
628}
629
630static int us5182d_write_event_config(struct iio_dev *indio_dev,
631 const struct iio_chan_spec *chan, enum iio_event_type type,
632 enum iio_event_direction dir, int state)
633{
634 struct us5182d_data *data = iio_priv(indio_dev);
635 int ret;
636 u16 new_th;
637
638 mutex_lock(&data->lock);
639
640 switch (dir) {
641 case IIO_EV_DIR_RISING:
642 if (data->rising_en == state) {
643 mutex_unlock(&data->lock);
644 return 0;
645 }
646 new_th = US5182D_PXH_TH_DISABLE;
647 if (state) {
648 data->power_mode = US5182D_CONTINUOUS;
649 ret = us5182d_set_power_state(data, true);
650 if (ret < 0)
651 goto err;
652 ret = us5182d_px_enable(data);
653 if (ret < 0)
654 goto err_poweroff;
655 new_th = data->px_high_th;
656 }
657 ret = us5182d_setup_prox(indio_dev, dir, new_th);
658 if (ret < 0)
659 goto err_poweroff;
660 data->rising_en = state;
661 break;
662 case IIO_EV_DIR_FALLING:
663 if (data->falling_en == state) {
664 mutex_unlock(&data->lock);
665 return 0;
666 }
667 new_th = US5182D_PXL_TH_DISABLE;
668 if (state) {
669 data->power_mode = US5182D_CONTINUOUS;
670 ret = us5182d_set_power_state(data, true);
671 if (ret < 0)
672 goto err;
673 ret = us5182d_px_enable(data);
674 if (ret < 0)
675 goto err_poweroff;
676 new_th = data->px_low_th;
677 }
678 ret = us5182d_setup_prox(indio_dev, dir, new_th);
679 if (ret < 0)
680 goto err_poweroff;
681 data->falling_en = state;
682 break;
683 default:
684 ret = -EINVAL;
685 goto err;
686 }
687
688 if (!state) {
689 ret = us5182d_set_power_state(data, false);
690 if (ret < 0)
691 goto err;
692 }
693
694 if (!data->falling_en && !data->rising_en && !data->default_continuous)
695 data->power_mode = US5182D_ONESHOT;
696
697 mutex_unlock(&data->lock);
698 return 0;
699
700err_poweroff:
701 if (state)
702 us5182d_set_power_state(data, false);
703err:
704 mutex_unlock(&data->lock);
705 return ret;
706}
707
708static const struct iio_info us5182d_info = {
709 .read_raw = us5182d_read_raw,
710 .write_raw = us5182d_write_raw,
711 .attrs = &us5182d_attr_group,
712 .read_event_value = &us5182d_read_thresh,
713 .write_event_value = &us5182d_write_thresh,
714 .read_event_config = &us5182d_read_event_config,
715 .write_event_config = &us5182d_write_event_config,
716};
717
718static int us5182d_reset(struct iio_dev *indio_dev)
719{
720 struct us5182d_data *data = iio_priv(indio_dev);
721
722 return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG3,
723 US5182D_RESET_CHIP);
724}
725
726static int us5182d_init(struct iio_dev *indio_dev)
727{
728 struct us5182d_data *data = iio_priv(indio_dev);
729 int i, ret;
730
731 ret = us5182d_reset(indio_dev);
732 if (ret < 0)
733 return ret;
734
735 data->opmode = 0;
736 data->power_mode = US5182D_CONTINUOUS;
737 data->px_low_th = US5182D_REG_PXL_TH_DEFAULT;
738 data->px_high_th = US5182D_REG_PXH_TH_DEFAULT;
739
740 for (i = 0; i < ARRAY_SIZE(us5182d_regvals); i++) {
741 ret = i2c_smbus_write_byte_data(data->client,
742 us5182d_regvals[i].reg,
743 us5182d_regvals[i].val);
744 if (ret < 0)
745 return ret;
746 }
747
748 data->als_enabled = true;
749 data->px_enabled = true;
750
751 if (!data->default_continuous) {
752 ret = us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
753 if (ret < 0)
754 return ret;
755 data->power_mode = US5182D_ONESHOT;
756 }
757
758 return ret;
759}
760
761static void us5182d_get_platform_data(struct iio_dev *indio_dev)
762{
763 struct us5182d_data *data = iio_priv(indio_dev);
764
765 if (device_property_read_u32(&data->client->dev, "upisemi,glass-coef",
766 &data->ga))
767 data->ga = US5182D_GA_RESOLUTION;
768 if (device_property_read_u16_array(&data->client->dev,
769 "upisemi,dark-ths",
770 data->us5182d_dark_ths,
771 ARRAY_SIZE(us5182d_dark_ths_vals)))
772 data->us5182d_dark_ths = us5182d_dark_ths_vals;
773 if (device_property_read_u8(&data->client->dev,
774 "upisemi,upper-dark-gain",
775 &data->upper_dark_gain))
776 data->upper_dark_gain = US5182D_REG_AUTO_HDARK_GAIN_DEFAULT;
777 if (device_property_read_u8(&data->client->dev,
778 "upisemi,lower-dark-gain",
779 &data->lower_dark_gain))
780 data->lower_dark_gain = US5182D_REG_AUTO_LDARK_GAIN_DEFAULT;
781 data->default_continuous = device_property_read_bool(&data->client->dev,
782 "upisemi,continuous");
783}
784
785static int us5182d_dark_gain_config(struct iio_dev *indio_dev)
786{
787 struct us5182d_data *data = iio_priv(indio_dev);
788 int ret;
789
790 ret = us5182d_update_dark_th(data, US5182D_CFG1_AGAIN_DEFAULT);
791 if (ret < 0)
792 return ret;
793
794 ret = i2c_smbus_write_byte_data(data->client,
795 US5182D_REG_AUTO_LDARK_GAIN,
796 data->lower_dark_gain);
797 if (ret < 0)
798 return ret;
799
800 ret = i2c_smbus_write_byte_data(data->client,
801 US5182D_REG_AUTO_HDARK_GAIN,
802 data->upper_dark_gain);
803 if (ret < 0)
804 return ret;
805
806 return i2c_smbus_write_byte_data(data->client, US5182D_REG_DARK_AUTO_EN,
807 US5182D_REG_DARK_AUTO_EN_DEFAULT);
808}
809
810static irqreturn_t us5182d_irq_thread_handler(int irq, void *private)
811{
812 struct iio_dev *indio_dev = private;
813 struct us5182d_data *data = iio_priv(indio_dev);
814 enum iio_event_direction dir;
815 int ret;
816 u64 ev;
817
818 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
819 if (ret < 0) {
820 dev_err(&data->client->dev, "i2c transfer error in irq\n");
821 return IRQ_HANDLED;
822 }
823
824 dir = ret & US5182D_CFG0_PROX ? IIO_EV_DIR_RISING : IIO_EV_DIR_FALLING;
825 ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1, IIO_EV_TYPE_THRESH, dir);
826
827 iio_push_event(indio_dev, ev, iio_get_time_ns(indio_dev));
828
829 ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0,
830 ret & ~US5182D_CFG0_PX_IRQ);
831 if (ret < 0)
832 dev_err(&data->client->dev, "i2c transfer error in irq\n");
833
834 return IRQ_HANDLED;
835}
836
837static int us5182d_probe(struct i2c_client *client,
838 const struct i2c_device_id *id)
839{
840 struct us5182d_data *data;
841 struct iio_dev *indio_dev;
842 int ret;
843
844 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
845 if (!indio_dev)
846 return -ENOMEM;
847
848 data = iio_priv(indio_dev);
849 i2c_set_clientdata(client, indio_dev);
850 data->client = client;
851
852 mutex_init(&data->lock);
853
854 indio_dev->dev.parent = &client->dev;
855 indio_dev->info = &us5182d_info;
856 indio_dev->name = US5182D_DRV_NAME;
857 indio_dev->channels = us5182d_channels;
858 indio_dev->num_channels = ARRAY_SIZE(us5182d_channels);
859 indio_dev->modes = INDIO_DIRECT_MODE;
860
861 ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CHIPID);
862 if (ret != US5182D_CHIPID) {
863 dev_err(&data->client->dev,
864 "Failed to detect US5182 light chip\n");
865 return (ret < 0) ? ret : -ENODEV;
866 }
867
868 if (client->irq > 0) {
869 ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
870 us5182d_irq_thread_handler,
871 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
872 "us5182d-irq", indio_dev);
873 if (ret < 0)
874 return ret;
875 } else
876 dev_warn(&client->dev, "no valid irq found\n");
877
878 us5182d_get_platform_data(indio_dev);
879 ret = us5182d_init(indio_dev);
880 if (ret < 0)
881 return ret;
882
883 ret = us5182d_dark_gain_config(indio_dev);
884 if (ret < 0)
885 goto out_err;
886
887 if (data->default_continuous) {
888 ret = pm_runtime_set_active(&client->dev);
889 if (ret < 0)
890 goto out_err;
891 }
892
893 pm_runtime_enable(&client->dev);
894 pm_runtime_set_autosuspend_delay(&client->dev,
895 US5182D_SLEEP_MS);
896 pm_runtime_use_autosuspend(&client->dev);
897
898 ret = iio_device_register(indio_dev);
899 if (ret < 0)
900 goto out_err;
901
902 return 0;
903
904out_err:
905 us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
906 return ret;
907
908}
909
910static int us5182d_remove(struct i2c_client *client)
911{
912 struct us5182d_data *data = iio_priv(i2c_get_clientdata(client));
913
914 iio_device_unregister(i2c_get_clientdata(client));
915
916 pm_runtime_disable(&client->dev);
917 pm_runtime_set_suspended(&client->dev);
918
919 return us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
920}
921
922#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM)
923static int us5182d_suspend(struct device *dev)
924{
925 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
926 struct us5182d_data *data = iio_priv(indio_dev);
927
928 if (data->power_mode == US5182D_CONTINUOUS)
929 return us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
930
931 return 0;
932}
933
934static int us5182d_resume(struct device *dev)
935{
936 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
937 struct us5182d_data *data = iio_priv(indio_dev);
938
939 if (data->power_mode == US5182D_CONTINUOUS)
940 return us5182d_shutdown_en(data,
941 ~US5182D_CFG0_SHUTDOWN_EN & 0xff);
942
943 return 0;
944}
945#endif
946
947static const struct dev_pm_ops us5182d_pm_ops = {
948 SET_SYSTEM_SLEEP_PM_OPS(us5182d_suspend, us5182d_resume)
949 SET_RUNTIME_PM_OPS(us5182d_suspend, us5182d_resume, NULL)
950};
951
952static const struct acpi_device_id us5182d_acpi_match[] = {
953 { "USD5182", 0},
954 {}
955};
956
957MODULE_DEVICE_TABLE(acpi, us5182d_acpi_match);
958
959static const struct i2c_device_id us5182d_id[] = {
960 {"usd5182", 0},
961 {}
962};
963
964MODULE_DEVICE_TABLE(i2c, us5182d_id);
965
966static const struct of_device_id us5182d_of_match[] = {
967 { .compatible = "upisemi,usd5182" },
968 {}
969};
970MODULE_DEVICE_TABLE(of, us5182d_of_match);
971
972static struct i2c_driver us5182d_driver = {
973 .driver = {
974 .name = US5182D_DRV_NAME,
975 .pm = &us5182d_pm_ops,
976 .of_match_table = us5182d_of_match,
977 .acpi_match_table = ACPI_PTR(us5182d_acpi_match),
978 },
979 .probe = us5182d_probe,
980 .remove = us5182d_remove,
981 .id_table = us5182d_id,
982
983};
984module_i2c_driver(us5182d_driver);
985
986MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
987MODULE_DESCRIPTION("Driver for us5182d Proximity and Light Sensor");
988MODULE_LICENSE("GPL v2");
989
