1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Azoteq IQS621/622 Ambient Light Sensors |
4 | * |
5 | * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com> |
6 | */ |
7 | |
8 | #include <linux/device.h> |
9 | #include <linux/iio/events.h> |
10 | #include <linux/iio/iio.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/mfd/iqs62x.h> |
13 | #include <linux/module.h> |
14 | #include <linux/mutex.h> |
15 | #include <linux/notifier.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/regmap.h> |
18 | |
19 | #define IQS621_ALS_FLAGS_LIGHT BIT(7) |
20 | #define IQS621_ALS_FLAGS_RANGE GENMASK(3, 0) |
21 | |
22 | #define IQS621_ALS_UI_OUT 0x17 |
23 | |
24 | #define IQS621_ALS_THRESH_DARK 0x80 |
25 | #define IQS621_ALS_THRESH_LIGHT 0x81 |
26 | |
27 | #define IQS622_IR_RANGE 0x15 |
28 | #define IQS622_IR_FLAGS 0x16 |
29 | #define IQS622_IR_FLAGS_TOUCH BIT(1) |
30 | #define IQS622_IR_FLAGS_PROX BIT(0) |
31 | |
32 | #define IQS622_IR_UI_OUT 0x17 |
33 | |
34 | #define IQS622_IR_THRESH_PROX 0x91 |
35 | #define IQS622_IR_THRESH_TOUCH 0x92 |
36 | |
37 | struct iqs621_als_private { |
38 | struct iqs62x_core *iqs62x; |
39 | struct iio_dev *indio_dev; |
40 | struct notifier_block notifier; |
41 | struct mutex lock; |
42 | bool light_en; |
43 | bool range_en; |
44 | bool prox_en; |
45 | u8 als_flags; |
46 | u8 ir_flags_mask; |
47 | u8 ir_flags; |
48 | u8 thresh_light; |
49 | u8 thresh_dark; |
50 | u8 thresh_prox; |
51 | }; |
52 | |
53 | static int iqs621_als_init(struct iqs621_als_private *iqs621_als) |
54 | { |
55 | struct iqs62x_core *iqs62x = iqs621_als->iqs62x; |
56 | unsigned int event_mask = 0; |
57 | int ret; |
58 | |
59 | switch (iqs621_als->ir_flags_mask) { |
60 | case IQS622_IR_FLAGS_TOUCH: |
61 | ret = regmap_write(map: iqs62x->regmap, IQS622_IR_THRESH_TOUCH, |
62 | val: iqs621_als->thresh_prox); |
63 | break; |
64 | |
65 | case IQS622_IR_FLAGS_PROX: |
66 | ret = regmap_write(map: iqs62x->regmap, IQS622_IR_THRESH_PROX, |
67 | val: iqs621_als->thresh_prox); |
68 | break; |
69 | |
70 | default: |
71 | ret = regmap_write(map: iqs62x->regmap, IQS621_ALS_THRESH_LIGHT, |
72 | val: iqs621_als->thresh_light); |
73 | if (ret) |
74 | return ret; |
75 | |
76 | ret = regmap_write(map: iqs62x->regmap, IQS621_ALS_THRESH_DARK, |
77 | val: iqs621_als->thresh_dark); |
78 | } |
79 | |
80 | if (ret) |
81 | return ret; |
82 | |
83 | if (iqs621_als->light_en || iqs621_als->range_en) |
84 | event_mask |= iqs62x->dev_desc->als_mask; |
85 | |
86 | if (iqs621_als->prox_en) |
87 | event_mask |= iqs62x->dev_desc->ir_mask; |
88 | |
89 | return regmap_update_bits(map: iqs62x->regmap, IQS620_GLBL_EVENT_MASK, |
90 | mask: event_mask, val: 0); |
91 | } |
92 | |
93 | static int iqs621_als_notifier(struct notifier_block *notifier, |
94 | unsigned long event_flags, void *context) |
95 | { |
96 | struct iqs62x_event_data *event_data = context; |
97 | struct iqs621_als_private *iqs621_als; |
98 | struct iio_dev *indio_dev; |
99 | bool light_new, light_old; |
100 | bool prox_new, prox_old; |
101 | u8 range_new, range_old; |
102 | s64 timestamp; |
103 | int ret; |
104 | |
105 | iqs621_als = container_of(notifier, struct iqs621_als_private, |
106 | notifier); |
107 | indio_dev = iqs621_als->indio_dev; |
108 | timestamp = iio_get_time_ns(indio_dev); |
109 | |
110 | mutex_lock(&iqs621_als->lock); |
111 | |
112 | if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) { |
113 | ret = iqs621_als_init(iqs621_als); |
114 | if (ret) { |
115 | dev_err(indio_dev->dev.parent, |
116 | "Failed to re-initialize device: %d\n" , ret); |
117 | ret = NOTIFY_BAD; |
118 | } else { |
119 | ret = NOTIFY_OK; |
120 | } |
121 | |
122 | goto err_mutex; |
123 | } |
124 | |
125 | if (!iqs621_als->light_en && !iqs621_als->range_en && |
126 | !iqs621_als->prox_en) { |
127 | ret = NOTIFY_DONE; |
128 | goto err_mutex; |
129 | } |
130 | |
131 | /* IQS621 only */ |
132 | light_new = event_data->als_flags & IQS621_ALS_FLAGS_LIGHT; |
133 | light_old = iqs621_als->als_flags & IQS621_ALS_FLAGS_LIGHT; |
134 | |
135 | if (iqs621_als->light_en && light_new && !light_old) |
136 | iio_push_event(indio_dev, |
137 | IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0, |
138 | IIO_EV_TYPE_THRESH, |
139 | IIO_EV_DIR_RISING), |
140 | timestamp); |
141 | else if (iqs621_als->light_en && !light_new && light_old) |
142 | iio_push_event(indio_dev, |
143 | IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0, |
144 | IIO_EV_TYPE_THRESH, |
145 | IIO_EV_DIR_FALLING), |
146 | timestamp); |
147 | |
148 | /* IQS621 and IQS622 */ |
149 | range_new = event_data->als_flags & IQS621_ALS_FLAGS_RANGE; |
150 | range_old = iqs621_als->als_flags & IQS621_ALS_FLAGS_RANGE; |
151 | |
152 | if (iqs621_als->range_en && (range_new > range_old)) |
153 | iio_push_event(indio_dev, |
154 | IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0, |
155 | IIO_EV_TYPE_CHANGE, |
156 | IIO_EV_DIR_RISING), |
157 | timestamp); |
158 | else if (iqs621_als->range_en && (range_new < range_old)) |
159 | iio_push_event(indio_dev, |
160 | IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0, |
161 | IIO_EV_TYPE_CHANGE, |
162 | IIO_EV_DIR_FALLING), |
163 | timestamp); |
164 | |
165 | /* IQS622 only */ |
166 | prox_new = event_data->ir_flags & iqs621_als->ir_flags_mask; |
167 | prox_old = iqs621_als->ir_flags & iqs621_als->ir_flags_mask; |
168 | |
169 | if (iqs621_als->prox_en && prox_new && !prox_old) |
170 | iio_push_event(indio_dev, |
171 | IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0, |
172 | IIO_EV_TYPE_THRESH, |
173 | IIO_EV_DIR_RISING), |
174 | timestamp); |
175 | else if (iqs621_als->prox_en && !prox_new && prox_old) |
176 | iio_push_event(indio_dev, |
177 | IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0, |
178 | IIO_EV_TYPE_THRESH, |
179 | IIO_EV_DIR_FALLING), |
180 | timestamp); |
181 | |
182 | iqs621_als->als_flags = event_data->als_flags; |
183 | iqs621_als->ir_flags = event_data->ir_flags; |
184 | ret = NOTIFY_OK; |
185 | |
186 | err_mutex: |
187 | mutex_unlock(lock: &iqs621_als->lock); |
188 | |
189 | return ret; |
190 | } |
191 | |
192 | static void iqs621_als_notifier_unregister(void *context) |
193 | { |
194 | struct iqs621_als_private *iqs621_als = context; |
195 | struct iio_dev *indio_dev = iqs621_als->indio_dev; |
196 | int ret; |
197 | |
198 | ret = blocking_notifier_chain_unregister(nh: &iqs621_als->iqs62x->nh, |
199 | nb: &iqs621_als->notifier); |
200 | if (ret) |
201 | dev_err(indio_dev->dev.parent, |
202 | "Failed to unregister notifier: %d\n" , ret); |
203 | } |
204 | |
205 | static int iqs621_als_read_raw(struct iio_dev *indio_dev, |
206 | struct iio_chan_spec const *chan, |
207 | int *val, int *val2, long mask) |
208 | { |
209 | struct iqs621_als_private *iqs621_als = iio_priv(indio_dev); |
210 | struct iqs62x_core *iqs62x = iqs621_als->iqs62x; |
211 | int ret; |
212 | __le16 val_buf; |
213 | |
214 | switch (chan->type) { |
215 | case IIO_INTENSITY: |
216 | ret = regmap_read(map: iqs62x->regmap, reg: chan->address, val); |
217 | if (ret) |
218 | return ret; |
219 | |
220 | *val &= IQS621_ALS_FLAGS_RANGE; |
221 | return IIO_VAL_INT; |
222 | |
223 | case IIO_PROXIMITY: |
224 | case IIO_LIGHT: |
225 | ret = regmap_raw_read(map: iqs62x->regmap, reg: chan->address, val: &val_buf, |
226 | val_len: sizeof(val_buf)); |
227 | if (ret) |
228 | return ret; |
229 | |
230 | *val = le16_to_cpu(val_buf); |
231 | return IIO_VAL_INT; |
232 | |
233 | default: |
234 | return -EINVAL; |
235 | } |
236 | } |
237 | |
238 | static int iqs621_als_read_event_config(struct iio_dev *indio_dev, |
239 | const struct iio_chan_spec *chan, |
240 | enum iio_event_type type, |
241 | enum iio_event_direction dir) |
242 | { |
243 | struct iqs621_als_private *iqs621_als = iio_priv(indio_dev); |
244 | int ret; |
245 | |
246 | mutex_lock(&iqs621_als->lock); |
247 | |
248 | switch (chan->type) { |
249 | case IIO_LIGHT: |
250 | ret = iqs621_als->light_en; |
251 | break; |
252 | |
253 | case IIO_INTENSITY: |
254 | ret = iqs621_als->range_en; |
255 | break; |
256 | |
257 | case IIO_PROXIMITY: |
258 | ret = iqs621_als->prox_en; |
259 | break; |
260 | |
261 | default: |
262 | ret = -EINVAL; |
263 | } |
264 | |
265 | mutex_unlock(lock: &iqs621_als->lock); |
266 | |
267 | return ret; |
268 | } |
269 | |
270 | static int iqs621_als_write_event_config(struct iio_dev *indio_dev, |
271 | const struct iio_chan_spec *chan, |
272 | enum iio_event_type type, |
273 | enum iio_event_direction dir, |
274 | int state) |
275 | { |
276 | struct iqs621_als_private *iqs621_als = iio_priv(indio_dev); |
277 | struct iqs62x_core *iqs62x = iqs621_als->iqs62x; |
278 | unsigned int val; |
279 | int ret; |
280 | |
281 | mutex_lock(&iqs621_als->lock); |
282 | |
283 | ret = regmap_read(map: iqs62x->regmap, reg: iqs62x->dev_desc->als_flags, val: &val); |
284 | if (ret) |
285 | goto err_mutex; |
286 | iqs621_als->als_flags = val; |
287 | |
288 | switch (chan->type) { |
289 | case IIO_LIGHT: |
290 | ret = regmap_update_bits(map: iqs62x->regmap, IQS620_GLBL_EVENT_MASK, |
291 | mask: iqs62x->dev_desc->als_mask, |
292 | val: iqs621_als->range_en || state ? 0 : |
293 | 0xFF); |
294 | if (!ret) |
295 | iqs621_als->light_en = state; |
296 | break; |
297 | |
298 | case IIO_INTENSITY: |
299 | ret = regmap_update_bits(map: iqs62x->regmap, IQS620_GLBL_EVENT_MASK, |
300 | mask: iqs62x->dev_desc->als_mask, |
301 | val: iqs621_als->light_en || state ? 0 : |
302 | 0xFF); |
303 | if (!ret) |
304 | iqs621_als->range_en = state; |
305 | break; |
306 | |
307 | case IIO_PROXIMITY: |
308 | ret = regmap_read(map: iqs62x->regmap, IQS622_IR_FLAGS, val: &val); |
309 | if (ret) |
310 | goto err_mutex; |
311 | iqs621_als->ir_flags = val; |
312 | |
313 | ret = regmap_update_bits(map: iqs62x->regmap, IQS620_GLBL_EVENT_MASK, |
314 | mask: iqs62x->dev_desc->ir_mask, |
315 | val: state ? 0 : 0xFF); |
316 | if (!ret) |
317 | iqs621_als->prox_en = state; |
318 | break; |
319 | |
320 | default: |
321 | ret = -EINVAL; |
322 | } |
323 | |
324 | err_mutex: |
325 | mutex_unlock(lock: &iqs621_als->lock); |
326 | |
327 | return ret; |
328 | } |
329 | |
330 | static int iqs621_als_read_event_value(struct iio_dev *indio_dev, |
331 | const struct iio_chan_spec *chan, |
332 | enum iio_event_type type, |
333 | enum iio_event_direction dir, |
334 | enum iio_event_info info, |
335 | int *val, int *val2) |
336 | { |
337 | struct iqs621_als_private *iqs621_als = iio_priv(indio_dev); |
338 | int ret = IIO_VAL_INT; |
339 | |
340 | mutex_lock(&iqs621_als->lock); |
341 | |
342 | switch (dir) { |
343 | case IIO_EV_DIR_RISING: |
344 | *val = iqs621_als->thresh_light * 16; |
345 | break; |
346 | |
347 | case IIO_EV_DIR_FALLING: |
348 | *val = iqs621_als->thresh_dark * 4; |
349 | break; |
350 | |
351 | case IIO_EV_DIR_EITHER: |
352 | if (iqs621_als->ir_flags_mask == IQS622_IR_FLAGS_TOUCH) |
353 | *val = iqs621_als->thresh_prox * 4; |
354 | else |
355 | *val = iqs621_als->thresh_prox; |
356 | break; |
357 | |
358 | default: |
359 | ret = -EINVAL; |
360 | } |
361 | |
362 | mutex_unlock(lock: &iqs621_als->lock); |
363 | |
364 | return ret; |
365 | } |
366 | |
367 | static int iqs621_als_write_event_value(struct iio_dev *indio_dev, |
368 | const struct iio_chan_spec *chan, |
369 | enum iio_event_type type, |
370 | enum iio_event_direction dir, |
371 | enum iio_event_info info, |
372 | int val, int val2) |
373 | { |
374 | struct iqs621_als_private *iqs621_als = iio_priv(indio_dev); |
375 | struct iqs62x_core *iqs62x = iqs621_als->iqs62x; |
376 | unsigned int thresh_reg, thresh_val; |
377 | u8 ir_flags_mask, *thresh_cache; |
378 | int ret = -EINVAL; |
379 | |
380 | mutex_lock(&iqs621_als->lock); |
381 | |
382 | switch (dir) { |
383 | case IIO_EV_DIR_RISING: |
384 | thresh_reg = IQS621_ALS_THRESH_LIGHT; |
385 | thresh_val = val / 16; |
386 | |
387 | thresh_cache = &iqs621_als->thresh_light; |
388 | ir_flags_mask = 0; |
389 | break; |
390 | |
391 | case IIO_EV_DIR_FALLING: |
392 | thresh_reg = IQS621_ALS_THRESH_DARK; |
393 | thresh_val = val / 4; |
394 | |
395 | thresh_cache = &iqs621_als->thresh_dark; |
396 | ir_flags_mask = 0; |
397 | break; |
398 | |
399 | case IIO_EV_DIR_EITHER: |
400 | /* |
401 | * The IQS622 supports two detection thresholds, both measured |
402 | * in the same arbitrary units reported by read_raw: proximity |
403 | * (0 through 255 in steps of 1), and touch (0 through 1020 in |
404 | * steps of 4). |
405 | * |
406 | * Based on the single detection threshold chosen by the user, |
407 | * select the hardware threshold that gives the best trade-off |
408 | * between range and resolution. |
409 | * |
410 | * By default, the close-range (but coarse) touch threshold is |
411 | * chosen during probe. |
412 | */ |
413 | switch (val) { |
414 | case 0 ... 255: |
415 | thresh_reg = IQS622_IR_THRESH_PROX; |
416 | thresh_val = val; |
417 | |
418 | ir_flags_mask = IQS622_IR_FLAGS_PROX; |
419 | break; |
420 | |
421 | case 256 ... 1020: |
422 | thresh_reg = IQS622_IR_THRESH_TOUCH; |
423 | thresh_val = val / 4; |
424 | |
425 | ir_flags_mask = IQS622_IR_FLAGS_TOUCH; |
426 | break; |
427 | |
428 | default: |
429 | goto err_mutex; |
430 | } |
431 | |
432 | thresh_cache = &iqs621_als->thresh_prox; |
433 | break; |
434 | |
435 | default: |
436 | goto err_mutex; |
437 | } |
438 | |
439 | if (thresh_val > 0xFF) |
440 | goto err_mutex; |
441 | |
442 | ret = regmap_write(map: iqs62x->regmap, reg: thresh_reg, val: thresh_val); |
443 | if (ret) |
444 | goto err_mutex; |
445 | |
446 | *thresh_cache = thresh_val; |
447 | iqs621_als->ir_flags_mask = ir_flags_mask; |
448 | |
449 | err_mutex: |
450 | mutex_unlock(lock: &iqs621_als->lock); |
451 | |
452 | return ret; |
453 | } |
454 | |
455 | static const struct iio_info iqs621_als_info = { |
456 | .read_raw = &iqs621_als_read_raw, |
457 | .read_event_config = iqs621_als_read_event_config, |
458 | .write_event_config = iqs621_als_write_event_config, |
459 | .read_event_value = iqs621_als_read_event_value, |
460 | .write_event_value = iqs621_als_write_event_value, |
461 | }; |
462 | |
463 | static const struct iio_event_spec iqs621_als_range_events[] = { |
464 | { |
465 | .type = IIO_EV_TYPE_CHANGE, |
466 | .dir = IIO_EV_DIR_EITHER, |
467 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), |
468 | }, |
469 | }; |
470 | |
471 | static const struct iio_event_spec iqs621_als_light_events[] = { |
472 | { |
473 | .type = IIO_EV_TYPE_THRESH, |
474 | .dir = IIO_EV_DIR_EITHER, |
475 | .mask_separate = BIT(IIO_EV_INFO_ENABLE), |
476 | }, |
477 | { |
478 | .type = IIO_EV_TYPE_THRESH, |
479 | .dir = IIO_EV_DIR_RISING, |
480 | .mask_separate = BIT(IIO_EV_INFO_VALUE), |
481 | }, |
482 | { |
483 | .type = IIO_EV_TYPE_THRESH, |
484 | .dir = IIO_EV_DIR_FALLING, |
485 | .mask_separate = BIT(IIO_EV_INFO_VALUE), |
486 | }, |
487 | }; |
488 | |
489 | static const struct iio_chan_spec iqs621_als_channels[] = { |
490 | { |
491 | .type = IIO_INTENSITY, |
492 | .address = IQS621_ALS_FLAGS, |
493 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
494 | .event_spec = iqs621_als_range_events, |
495 | .num_event_specs = ARRAY_SIZE(iqs621_als_range_events), |
496 | }, |
497 | { |
498 | .type = IIO_LIGHT, |
499 | .address = IQS621_ALS_UI_OUT, |
500 | .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), |
501 | .event_spec = iqs621_als_light_events, |
502 | .num_event_specs = ARRAY_SIZE(iqs621_als_light_events), |
503 | }, |
504 | }; |
505 | |
506 | static const struct iio_event_spec iqs622_als_prox_events[] = { |
507 | { |
508 | .type = IIO_EV_TYPE_THRESH, |
509 | .dir = IIO_EV_DIR_EITHER, |
510 | .mask_separate = BIT(IIO_EV_INFO_ENABLE) | |
511 | BIT(IIO_EV_INFO_VALUE), |
512 | }, |
513 | }; |
514 | |
515 | static const struct iio_chan_spec iqs622_als_channels[] = { |
516 | { |
517 | .type = IIO_INTENSITY, |
518 | .channel2 = IIO_MOD_LIGHT_BOTH, |
519 | .address = IQS622_ALS_FLAGS, |
520 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
521 | .event_spec = iqs621_als_range_events, |
522 | .num_event_specs = ARRAY_SIZE(iqs621_als_range_events), |
523 | .modified = true, |
524 | }, |
525 | { |
526 | .type = IIO_INTENSITY, |
527 | .channel2 = IIO_MOD_LIGHT_IR, |
528 | .address = IQS622_IR_RANGE, |
529 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
530 | .modified = true, |
531 | }, |
532 | { |
533 | .type = IIO_PROXIMITY, |
534 | .address = IQS622_IR_UI_OUT, |
535 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
536 | .event_spec = iqs622_als_prox_events, |
537 | .num_event_specs = ARRAY_SIZE(iqs622_als_prox_events), |
538 | }, |
539 | }; |
540 | |
541 | static int iqs621_als_probe(struct platform_device *pdev) |
542 | { |
543 | struct iqs62x_core *iqs62x = dev_get_drvdata(dev: pdev->dev.parent); |
544 | struct iqs621_als_private *iqs621_als; |
545 | struct iio_dev *indio_dev; |
546 | unsigned int val; |
547 | int ret; |
548 | |
549 | indio_dev = devm_iio_device_alloc(parent: &pdev->dev, sizeof_priv: sizeof(*iqs621_als)); |
550 | if (!indio_dev) |
551 | return -ENOMEM; |
552 | |
553 | iqs621_als = iio_priv(indio_dev); |
554 | iqs621_als->iqs62x = iqs62x; |
555 | iqs621_als->indio_dev = indio_dev; |
556 | |
557 | if (iqs62x->dev_desc->prod_num == IQS622_PROD_NUM) { |
558 | ret = regmap_read(map: iqs62x->regmap, IQS622_IR_THRESH_TOUCH, |
559 | val: &val); |
560 | if (ret) |
561 | return ret; |
562 | iqs621_als->thresh_prox = val; |
563 | iqs621_als->ir_flags_mask = IQS622_IR_FLAGS_TOUCH; |
564 | |
565 | indio_dev->channels = iqs622_als_channels; |
566 | indio_dev->num_channels = ARRAY_SIZE(iqs622_als_channels); |
567 | } else { |
568 | ret = regmap_read(map: iqs62x->regmap, IQS621_ALS_THRESH_LIGHT, |
569 | val: &val); |
570 | if (ret) |
571 | return ret; |
572 | iqs621_als->thresh_light = val; |
573 | |
574 | ret = regmap_read(map: iqs62x->regmap, IQS621_ALS_THRESH_DARK, |
575 | val: &val); |
576 | if (ret) |
577 | return ret; |
578 | iqs621_als->thresh_dark = val; |
579 | |
580 | indio_dev->channels = iqs621_als_channels; |
581 | indio_dev->num_channels = ARRAY_SIZE(iqs621_als_channels); |
582 | } |
583 | |
584 | indio_dev->modes = INDIO_DIRECT_MODE; |
585 | indio_dev->name = iqs62x->dev_desc->dev_name; |
586 | indio_dev->info = &iqs621_als_info; |
587 | |
588 | mutex_init(&iqs621_als->lock); |
589 | |
590 | iqs621_als->notifier.notifier_call = iqs621_als_notifier; |
591 | ret = blocking_notifier_chain_register(nh: &iqs621_als->iqs62x->nh, |
592 | nb: &iqs621_als->notifier); |
593 | if (ret) { |
594 | dev_err(&pdev->dev, "Failed to register notifier: %d\n" , ret); |
595 | return ret; |
596 | } |
597 | |
598 | ret = devm_add_action_or_reset(&pdev->dev, |
599 | iqs621_als_notifier_unregister, |
600 | iqs621_als); |
601 | if (ret) |
602 | return ret; |
603 | |
604 | return devm_iio_device_register(&pdev->dev, indio_dev); |
605 | } |
606 | |
607 | static struct platform_driver iqs621_als_platform_driver = { |
608 | .driver = { |
609 | .name = "iqs621-als" , |
610 | }, |
611 | .probe = iqs621_als_probe, |
612 | }; |
613 | module_platform_driver(iqs621_als_platform_driver); |
614 | |
615 | MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>" ); |
616 | MODULE_DESCRIPTION("Azoteq IQS621/622 Ambient Light Sensors" ); |
617 | MODULE_LICENSE("GPL" ); |
618 | MODULE_ALIAS("platform:iqs621-als" ); |
619 | |