1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Sensortek STK3310/STK3311 Ambient Light and Proximity Sensor |
4 | * |
5 | * Copyright (c) 2015, Intel Corporation. |
6 | * |
7 | * IIO driver for STK3310/STK3311. 7-bit I2C address: 0x48. |
8 | */ |
9 | |
10 | #include <linux/acpi.h> |
11 | #include <linux/i2c.h> |
12 | #include <linux/interrupt.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/module.h> |
15 | #include <linux/regmap.h> |
16 | #include <linux/iio/events.h> |
17 | #include <linux/iio/iio.h> |
18 | #include <linux/iio/sysfs.h> |
19 | |
20 | #define STK3310_REG_STATE 0x00 |
21 | #define STK3310_REG_PSCTRL 0x01 |
22 | #define STK3310_REG_ALSCTRL 0x02 |
23 | #define STK3310_REG_INT 0x04 |
24 | #define STK3310_REG_THDH_PS 0x06 |
25 | #define STK3310_REG_THDL_PS 0x08 |
26 | #define STK3310_REG_FLAG 0x10 |
27 | #define STK3310_REG_PS_DATA_MSB 0x11 |
28 | #define STK3310_REG_PS_DATA_LSB 0x12 |
29 | #define STK3310_REG_ALS_DATA_MSB 0x13 |
30 | #define STK3310_REG_ALS_DATA_LSB 0x14 |
31 | #define STK3310_REG_ID 0x3E |
32 | #define STK3310_MAX_REG 0x80 |
33 | |
34 | #define STK3310_STATE_EN_PS BIT(0) |
35 | #define STK3310_STATE_EN_ALS BIT(1) |
36 | #define STK3310_STATE_STANDBY 0x00 |
37 | |
38 | #define STK3310_CHIP_ID_VAL 0x13 |
39 | #define STK3311_CHIP_ID_VAL 0x1D |
40 | #define STK3311X_CHIP_ID_VAL 0x12 |
41 | #define STK3335_CHIP_ID_VAL 0x51 |
42 | #define STK3310_PSINT_EN 0x01 |
43 | #define STK3310_PS_MAX_VAL 0xFFFF |
44 | |
45 | #define STK3310_DRIVER_NAME "stk3310" |
46 | #define STK3310_REGMAP_NAME "stk3310_regmap" |
47 | #define STK3310_EVENT "stk3310_event" |
48 | |
49 | #define STK3310_SCALE_AVAILABLE "6.4 1.6 0.4 0.1" |
50 | |
51 | #define STK3310_IT_AVAILABLE \ |
52 | "0.000185 0.000370 0.000741 0.001480 0.002960 0.005920 0.011840 " \ |
53 | "0.023680 0.047360 0.094720 0.189440 0.378880 0.757760 1.515520 " \ |
54 | "3.031040 6.062080" |
55 | |
56 | #define STK3310_REGFIELD(name) \ |
57 | do { \ |
58 | data->reg_##name = \ |
59 | devm_regmap_field_alloc(&client->dev, regmap, \ |
60 | stk3310_reg_field_##name); \ |
61 | if (IS_ERR(data->reg_##name)) { \ |
62 | dev_err(&client->dev, "reg field alloc failed.\n"); \ |
63 | return PTR_ERR(data->reg_##name); \ |
64 | } \ |
65 | } while (0) |
66 | |
67 | static const struct reg_field stk3310_reg_field_state = |
68 | REG_FIELD(STK3310_REG_STATE, 0, 2); |
69 | static const struct reg_field stk3310_reg_field_als_gain = |
70 | REG_FIELD(STK3310_REG_ALSCTRL, 4, 5); |
71 | static const struct reg_field stk3310_reg_field_ps_gain = |
72 | REG_FIELD(STK3310_REG_PSCTRL, 4, 5); |
73 | static const struct reg_field stk3310_reg_field_als_it = |
74 | REG_FIELD(STK3310_REG_ALSCTRL, 0, 3); |
75 | static const struct reg_field stk3310_reg_field_ps_it = |
76 | REG_FIELD(STK3310_REG_PSCTRL, 0, 3); |
77 | static const struct reg_field stk3310_reg_field_int_ps = |
78 | REG_FIELD(STK3310_REG_INT, 0, 2); |
79 | static const struct reg_field stk3310_reg_field_flag_psint = |
80 | REG_FIELD(STK3310_REG_FLAG, 4, 4); |
81 | static const struct reg_field stk3310_reg_field_flag_nf = |
82 | REG_FIELD(STK3310_REG_FLAG, 0, 0); |
83 | |
84 | /* Estimate maximum proximity values with regard to measurement scale. */ |
85 | static const int stk3310_ps_max[4] = { |
86 | STK3310_PS_MAX_VAL / 640, |
87 | STK3310_PS_MAX_VAL / 160, |
88 | STK3310_PS_MAX_VAL / 40, |
89 | STK3310_PS_MAX_VAL / 10 |
90 | }; |
91 | |
92 | static const int stk3310_scale_table[][2] = { |
93 | {6, 400000}, {1, 600000}, {0, 400000}, {0, 100000} |
94 | }; |
95 | |
96 | /* Integration time in seconds, microseconds */ |
97 | static const int stk3310_it_table[][2] = { |
98 | {0, 185}, {0, 370}, {0, 741}, {0, 1480}, |
99 | {0, 2960}, {0, 5920}, {0, 11840}, {0, 23680}, |
100 | {0, 47360}, {0, 94720}, {0, 189440}, {0, 378880}, |
101 | {0, 757760}, {1, 515520}, {3, 31040}, {6, 62080}, |
102 | }; |
103 | |
104 | struct stk3310_data { |
105 | struct i2c_client *client; |
106 | struct mutex lock; |
107 | bool als_enabled; |
108 | bool ps_enabled; |
109 | uint32_t ps_near_level; |
110 | u64 timestamp; |
111 | struct regmap *regmap; |
112 | struct regmap_field *reg_state; |
113 | struct regmap_field *reg_als_gain; |
114 | struct regmap_field *reg_ps_gain; |
115 | struct regmap_field *reg_als_it; |
116 | struct regmap_field *reg_ps_it; |
117 | struct regmap_field *reg_int_ps; |
118 | struct regmap_field *reg_flag_psint; |
119 | struct regmap_field *reg_flag_nf; |
120 | }; |
121 | |
122 | static const struct iio_event_spec stk3310_events[] = { |
123 | /* Proximity event */ |
124 | { |
125 | .type = IIO_EV_TYPE_THRESH, |
126 | .dir = IIO_EV_DIR_RISING, |
127 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
128 | BIT(IIO_EV_INFO_ENABLE), |
129 | }, |
130 | /* Out-of-proximity event */ |
131 | { |
132 | .type = IIO_EV_TYPE_THRESH, |
133 | .dir = IIO_EV_DIR_FALLING, |
134 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
135 | BIT(IIO_EV_INFO_ENABLE), |
136 | }, |
137 | }; |
138 | |
139 | static ssize_t stk3310_read_near_level(struct iio_dev *indio_dev, |
140 | uintptr_t priv, |
141 | const struct iio_chan_spec *chan, |
142 | char *buf) |
143 | { |
144 | struct stk3310_data *data = iio_priv(indio_dev); |
145 | |
146 | return sprintf(buf, fmt: "%u\n" , data->ps_near_level); |
147 | } |
148 | |
149 | static const struct iio_chan_spec_ext_info stk3310_ext_info[] = { |
150 | { |
151 | .name = "nearlevel" , |
152 | .shared = IIO_SEPARATE, |
153 | .read = stk3310_read_near_level, |
154 | }, |
155 | { /* sentinel */ } |
156 | }; |
157 | |
158 | static const struct iio_chan_spec stk3310_channels[] = { |
159 | { |
160 | .type = IIO_LIGHT, |
161 | .info_mask_separate = |
162 | BIT(IIO_CHAN_INFO_RAW) | |
163 | BIT(IIO_CHAN_INFO_SCALE) | |
164 | BIT(IIO_CHAN_INFO_INT_TIME), |
165 | }, |
166 | { |
167 | .type = IIO_PROXIMITY, |
168 | .info_mask_separate = |
169 | BIT(IIO_CHAN_INFO_RAW) | |
170 | BIT(IIO_CHAN_INFO_SCALE) | |
171 | BIT(IIO_CHAN_INFO_INT_TIME), |
172 | .event_spec = stk3310_events, |
173 | .num_event_specs = ARRAY_SIZE(stk3310_events), |
174 | .ext_info = stk3310_ext_info, |
175 | } |
176 | }; |
177 | |
178 | static IIO_CONST_ATTR(in_illuminance_scale_available, STK3310_SCALE_AVAILABLE); |
179 | |
180 | static IIO_CONST_ATTR(in_proximity_scale_available, STK3310_SCALE_AVAILABLE); |
181 | |
182 | static IIO_CONST_ATTR(in_illuminance_integration_time_available, |
183 | STK3310_IT_AVAILABLE); |
184 | |
185 | static IIO_CONST_ATTR(in_proximity_integration_time_available, |
186 | STK3310_IT_AVAILABLE); |
187 | |
188 | static struct attribute *stk3310_attributes[] = { |
189 | &iio_const_attr_in_illuminance_scale_available.dev_attr.attr, |
190 | &iio_const_attr_in_proximity_scale_available.dev_attr.attr, |
191 | &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr, |
192 | &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr, |
193 | NULL, |
194 | }; |
195 | |
196 | static const struct attribute_group stk3310_attribute_group = { |
197 | .attrs = stk3310_attributes |
198 | }; |
199 | |
200 | static int stk3310_get_index(const int table[][2], int table_size, |
201 | int val, int val2) |
202 | { |
203 | int i; |
204 | |
205 | for (i = 0; i < table_size; i++) { |
206 | if (val == table[i][0] && val2 == table[i][1]) |
207 | return i; |
208 | } |
209 | |
210 | return -EINVAL; |
211 | } |
212 | |
213 | static int stk3310_read_event(struct iio_dev *indio_dev, |
214 | const struct iio_chan_spec *chan, |
215 | enum iio_event_type type, |
216 | enum iio_event_direction dir, |
217 | enum iio_event_info info, |
218 | int *val, int *val2) |
219 | { |
220 | u8 reg; |
221 | __be16 buf; |
222 | int ret; |
223 | struct stk3310_data *data = iio_priv(indio_dev); |
224 | |
225 | if (info != IIO_EV_INFO_VALUE) |
226 | return -EINVAL; |
227 | |
228 | /* Only proximity interrupts are implemented at the moment. */ |
229 | if (dir == IIO_EV_DIR_RISING) |
230 | reg = STK3310_REG_THDH_PS; |
231 | else if (dir == IIO_EV_DIR_FALLING) |
232 | reg = STK3310_REG_THDL_PS; |
233 | else |
234 | return -EINVAL; |
235 | |
236 | mutex_lock(&data->lock); |
237 | ret = regmap_bulk_read(map: data->regmap, reg, val: &buf, val_count: 2); |
238 | mutex_unlock(lock: &data->lock); |
239 | if (ret < 0) { |
240 | dev_err(&data->client->dev, "register read failed\n" ); |
241 | return ret; |
242 | } |
243 | *val = be16_to_cpu(buf); |
244 | |
245 | return IIO_VAL_INT; |
246 | } |
247 | |
248 | static int stk3310_write_event(struct iio_dev *indio_dev, |
249 | const struct iio_chan_spec *chan, |
250 | enum iio_event_type type, |
251 | enum iio_event_direction dir, |
252 | enum iio_event_info info, |
253 | int val, int val2) |
254 | { |
255 | u8 reg; |
256 | __be16 buf; |
257 | int ret; |
258 | unsigned int index; |
259 | struct stk3310_data *data = iio_priv(indio_dev); |
260 | struct i2c_client *client = data->client; |
261 | |
262 | ret = regmap_field_read(field: data->reg_ps_gain, val: &index); |
263 | if (ret < 0) |
264 | return ret; |
265 | |
266 | if (val < 0 || val > stk3310_ps_max[index]) |
267 | return -EINVAL; |
268 | |
269 | if (dir == IIO_EV_DIR_RISING) |
270 | reg = STK3310_REG_THDH_PS; |
271 | else if (dir == IIO_EV_DIR_FALLING) |
272 | reg = STK3310_REG_THDL_PS; |
273 | else |
274 | return -EINVAL; |
275 | |
276 | buf = cpu_to_be16(val); |
277 | ret = regmap_bulk_write(map: data->regmap, reg, val: &buf, val_count: 2); |
278 | if (ret < 0) |
279 | dev_err(&client->dev, "failed to set PS threshold!\n" ); |
280 | |
281 | return ret; |
282 | } |
283 | |
284 | static int stk3310_read_event_config(struct iio_dev *indio_dev, |
285 | const struct iio_chan_spec *chan, |
286 | enum iio_event_type type, |
287 | enum iio_event_direction dir) |
288 | { |
289 | unsigned int event_val; |
290 | int ret; |
291 | struct stk3310_data *data = iio_priv(indio_dev); |
292 | |
293 | ret = regmap_field_read(field: data->reg_int_ps, val: &event_val); |
294 | if (ret < 0) |
295 | return ret; |
296 | |
297 | return event_val; |
298 | } |
299 | |
300 | static int stk3310_write_event_config(struct iio_dev *indio_dev, |
301 | const struct iio_chan_spec *chan, |
302 | enum iio_event_type type, |
303 | enum iio_event_direction dir, |
304 | int state) |
305 | { |
306 | int ret; |
307 | struct stk3310_data *data = iio_priv(indio_dev); |
308 | struct i2c_client *client = data->client; |
309 | |
310 | if (state < 0 || state > 7) |
311 | return -EINVAL; |
312 | |
313 | /* Set INT_PS value */ |
314 | mutex_lock(&data->lock); |
315 | ret = regmap_field_write(field: data->reg_int_ps, val: state); |
316 | if (ret < 0) |
317 | dev_err(&client->dev, "failed to set interrupt mode\n" ); |
318 | mutex_unlock(lock: &data->lock); |
319 | |
320 | return ret; |
321 | } |
322 | |
323 | static int stk3310_read_raw(struct iio_dev *indio_dev, |
324 | struct iio_chan_spec const *chan, |
325 | int *val, int *val2, long mask) |
326 | { |
327 | u8 reg; |
328 | __be16 buf; |
329 | int ret; |
330 | unsigned int index; |
331 | struct stk3310_data *data = iio_priv(indio_dev); |
332 | struct i2c_client *client = data->client; |
333 | |
334 | if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY) |
335 | return -EINVAL; |
336 | |
337 | switch (mask) { |
338 | case IIO_CHAN_INFO_RAW: |
339 | if (chan->type == IIO_LIGHT) |
340 | reg = STK3310_REG_ALS_DATA_MSB; |
341 | else |
342 | reg = STK3310_REG_PS_DATA_MSB; |
343 | |
344 | mutex_lock(&data->lock); |
345 | ret = regmap_bulk_read(map: data->regmap, reg, val: &buf, val_count: 2); |
346 | if (ret < 0) { |
347 | dev_err(&client->dev, "register read failed\n" ); |
348 | mutex_unlock(lock: &data->lock); |
349 | return ret; |
350 | } |
351 | *val = be16_to_cpu(buf); |
352 | mutex_unlock(lock: &data->lock); |
353 | return IIO_VAL_INT; |
354 | case IIO_CHAN_INFO_INT_TIME: |
355 | if (chan->type == IIO_LIGHT) |
356 | ret = regmap_field_read(field: data->reg_als_it, val: &index); |
357 | else |
358 | ret = regmap_field_read(field: data->reg_ps_it, val: &index); |
359 | if (ret < 0) |
360 | return ret; |
361 | |
362 | *val = stk3310_it_table[index][0]; |
363 | *val2 = stk3310_it_table[index][1]; |
364 | return IIO_VAL_INT_PLUS_MICRO; |
365 | case IIO_CHAN_INFO_SCALE: |
366 | if (chan->type == IIO_LIGHT) |
367 | ret = regmap_field_read(field: data->reg_als_gain, val: &index); |
368 | else |
369 | ret = regmap_field_read(field: data->reg_ps_gain, val: &index); |
370 | if (ret < 0) |
371 | return ret; |
372 | |
373 | *val = stk3310_scale_table[index][0]; |
374 | *val2 = stk3310_scale_table[index][1]; |
375 | return IIO_VAL_INT_PLUS_MICRO; |
376 | } |
377 | |
378 | return -EINVAL; |
379 | } |
380 | |
381 | static int stk3310_write_raw(struct iio_dev *indio_dev, |
382 | struct iio_chan_spec const *chan, |
383 | int val, int val2, long mask) |
384 | { |
385 | int ret; |
386 | int index; |
387 | struct stk3310_data *data = iio_priv(indio_dev); |
388 | |
389 | if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY) |
390 | return -EINVAL; |
391 | |
392 | switch (mask) { |
393 | case IIO_CHAN_INFO_INT_TIME: |
394 | index = stk3310_get_index(table: stk3310_it_table, |
395 | ARRAY_SIZE(stk3310_it_table), |
396 | val, val2); |
397 | if (index < 0) |
398 | return -EINVAL; |
399 | mutex_lock(&data->lock); |
400 | if (chan->type == IIO_LIGHT) |
401 | ret = regmap_field_write(field: data->reg_als_it, val: index); |
402 | else |
403 | ret = regmap_field_write(field: data->reg_ps_it, val: index); |
404 | if (ret < 0) |
405 | dev_err(&data->client->dev, |
406 | "sensor configuration failed\n" ); |
407 | mutex_unlock(lock: &data->lock); |
408 | return ret; |
409 | |
410 | case IIO_CHAN_INFO_SCALE: |
411 | index = stk3310_get_index(table: stk3310_scale_table, |
412 | ARRAY_SIZE(stk3310_scale_table), |
413 | val, val2); |
414 | if (index < 0) |
415 | return -EINVAL; |
416 | mutex_lock(&data->lock); |
417 | if (chan->type == IIO_LIGHT) |
418 | ret = regmap_field_write(field: data->reg_als_gain, val: index); |
419 | else |
420 | ret = regmap_field_write(field: data->reg_ps_gain, val: index); |
421 | if (ret < 0) |
422 | dev_err(&data->client->dev, |
423 | "sensor configuration failed\n" ); |
424 | mutex_unlock(lock: &data->lock); |
425 | return ret; |
426 | } |
427 | |
428 | return -EINVAL; |
429 | } |
430 | |
431 | static const struct iio_info stk3310_info = { |
432 | .read_raw = stk3310_read_raw, |
433 | .write_raw = stk3310_write_raw, |
434 | .attrs = &stk3310_attribute_group, |
435 | .read_event_value = stk3310_read_event, |
436 | .write_event_value = stk3310_write_event, |
437 | .read_event_config = stk3310_read_event_config, |
438 | .write_event_config = stk3310_write_event_config, |
439 | }; |
440 | |
441 | static int stk3310_set_state(struct stk3310_data *data, u8 state) |
442 | { |
443 | int ret; |
444 | struct i2c_client *client = data->client; |
445 | |
446 | /* 3-bit state; 0b100 is not supported. */ |
447 | if (state > 7 || state == 4) |
448 | return -EINVAL; |
449 | |
450 | mutex_lock(&data->lock); |
451 | ret = regmap_field_write(field: data->reg_state, val: state); |
452 | if (ret < 0) { |
453 | dev_err(&client->dev, "failed to change sensor state\n" ); |
454 | } else if (state != STK3310_STATE_STANDBY) { |
455 | /* Don't reset the 'enabled' flags if we're going in standby */ |
456 | data->ps_enabled = !!(state & STK3310_STATE_EN_PS); |
457 | data->als_enabled = !!(state & STK3310_STATE_EN_ALS); |
458 | } |
459 | mutex_unlock(lock: &data->lock); |
460 | |
461 | return ret; |
462 | } |
463 | |
464 | static int stk3310_init(struct iio_dev *indio_dev) |
465 | { |
466 | int ret; |
467 | int chipid; |
468 | u8 state; |
469 | struct stk3310_data *data = iio_priv(indio_dev); |
470 | struct i2c_client *client = data->client; |
471 | |
472 | ret = regmap_read(map: data->regmap, STK3310_REG_ID, val: &chipid); |
473 | if (ret < 0) |
474 | return ret; |
475 | |
476 | if (chipid != STK3310_CHIP_ID_VAL && |
477 | chipid != STK3311_CHIP_ID_VAL && |
478 | chipid != STK3311X_CHIP_ID_VAL && |
479 | chipid != STK3335_CHIP_ID_VAL) { |
480 | dev_err(&client->dev, "invalid chip id: 0x%x\n" , chipid); |
481 | return -ENODEV; |
482 | } |
483 | |
484 | state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS; |
485 | ret = stk3310_set_state(data, state); |
486 | if (ret < 0) { |
487 | dev_err(&client->dev, "failed to enable sensor" ); |
488 | return ret; |
489 | } |
490 | |
491 | /* Enable PS interrupts */ |
492 | ret = regmap_field_write(field: data->reg_int_ps, STK3310_PSINT_EN); |
493 | if (ret < 0) |
494 | dev_err(&client->dev, "failed to enable interrupts!\n" ); |
495 | |
496 | return ret; |
497 | } |
498 | |
499 | static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg) |
500 | { |
501 | switch (reg) { |
502 | case STK3310_REG_ALS_DATA_MSB: |
503 | case STK3310_REG_ALS_DATA_LSB: |
504 | case STK3310_REG_PS_DATA_LSB: |
505 | case STK3310_REG_PS_DATA_MSB: |
506 | case STK3310_REG_FLAG: |
507 | return true; |
508 | default: |
509 | return false; |
510 | } |
511 | } |
512 | |
513 | static const struct regmap_config stk3310_regmap_config = { |
514 | .name = STK3310_REGMAP_NAME, |
515 | .reg_bits = 8, |
516 | .val_bits = 8, |
517 | .max_register = STK3310_MAX_REG, |
518 | .cache_type = REGCACHE_RBTREE, |
519 | .volatile_reg = stk3310_is_volatile_reg, |
520 | }; |
521 | |
522 | static int stk3310_regmap_init(struct stk3310_data *data) |
523 | { |
524 | struct regmap *regmap; |
525 | struct i2c_client *client; |
526 | |
527 | client = data->client; |
528 | regmap = devm_regmap_init_i2c(client, &stk3310_regmap_config); |
529 | if (IS_ERR(ptr: regmap)) { |
530 | dev_err(&client->dev, "regmap initialization failed.\n" ); |
531 | return PTR_ERR(ptr: regmap); |
532 | } |
533 | data->regmap = regmap; |
534 | |
535 | STK3310_REGFIELD(state); |
536 | STK3310_REGFIELD(als_gain); |
537 | STK3310_REGFIELD(ps_gain); |
538 | STK3310_REGFIELD(als_it); |
539 | STK3310_REGFIELD(ps_it); |
540 | STK3310_REGFIELD(int_ps); |
541 | STK3310_REGFIELD(flag_psint); |
542 | STK3310_REGFIELD(flag_nf); |
543 | |
544 | return 0; |
545 | } |
546 | |
547 | static irqreturn_t stk3310_irq_handler(int irq, void *private) |
548 | { |
549 | struct iio_dev *indio_dev = private; |
550 | struct stk3310_data *data = iio_priv(indio_dev); |
551 | |
552 | data->timestamp = iio_get_time_ns(indio_dev); |
553 | |
554 | return IRQ_WAKE_THREAD; |
555 | } |
556 | |
557 | static irqreturn_t stk3310_irq_event_handler(int irq, void *private) |
558 | { |
559 | int ret; |
560 | unsigned int dir; |
561 | u64 event; |
562 | |
563 | struct iio_dev *indio_dev = private; |
564 | struct stk3310_data *data = iio_priv(indio_dev); |
565 | |
566 | /* Read FLAG_NF to figure out what threshold has been met. */ |
567 | mutex_lock(&data->lock); |
568 | ret = regmap_field_read(field: data->reg_flag_nf, val: &dir); |
569 | if (ret < 0) { |
570 | dev_err(&data->client->dev, "register read failed: %d\n" , ret); |
571 | goto out; |
572 | } |
573 | event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1, |
574 | IIO_EV_TYPE_THRESH, |
575 | (dir ? IIO_EV_DIR_FALLING : |
576 | IIO_EV_DIR_RISING)); |
577 | iio_push_event(indio_dev, ev_code: event, timestamp: data->timestamp); |
578 | |
579 | /* Reset the interrupt flag */ |
580 | ret = regmap_field_write(field: data->reg_flag_psint, val: 0); |
581 | if (ret < 0) |
582 | dev_err(&data->client->dev, "failed to reset interrupts\n" ); |
583 | out: |
584 | mutex_unlock(lock: &data->lock); |
585 | |
586 | return IRQ_HANDLED; |
587 | } |
588 | |
589 | static int stk3310_probe(struct i2c_client *client) |
590 | { |
591 | int ret; |
592 | struct iio_dev *indio_dev; |
593 | struct stk3310_data *data; |
594 | |
595 | indio_dev = devm_iio_device_alloc(parent: &client->dev, sizeof_priv: sizeof(*data)); |
596 | if (!indio_dev) { |
597 | dev_err(&client->dev, "iio allocation failed!\n" ); |
598 | return -ENOMEM; |
599 | } |
600 | |
601 | data = iio_priv(indio_dev); |
602 | data->client = client; |
603 | i2c_set_clientdata(client, data: indio_dev); |
604 | |
605 | device_property_read_u32(dev: &client->dev, propname: "proximity-near-level" , |
606 | val: &data->ps_near_level); |
607 | |
608 | mutex_init(&data->lock); |
609 | |
610 | ret = stk3310_regmap_init(data); |
611 | if (ret < 0) |
612 | return ret; |
613 | |
614 | indio_dev->info = &stk3310_info; |
615 | indio_dev->name = STK3310_DRIVER_NAME; |
616 | indio_dev->modes = INDIO_DIRECT_MODE; |
617 | indio_dev->channels = stk3310_channels; |
618 | indio_dev->num_channels = ARRAY_SIZE(stk3310_channels); |
619 | |
620 | ret = stk3310_init(indio_dev); |
621 | if (ret < 0) |
622 | return ret; |
623 | |
624 | if (client->irq > 0) { |
625 | ret = devm_request_threaded_irq(dev: &client->dev, irq: client->irq, |
626 | handler: stk3310_irq_handler, |
627 | thread_fn: stk3310_irq_event_handler, |
628 | IRQF_TRIGGER_FALLING | |
629 | IRQF_ONESHOT, |
630 | STK3310_EVENT, dev_id: indio_dev); |
631 | if (ret < 0) { |
632 | dev_err(&client->dev, "request irq %d failed\n" , |
633 | client->irq); |
634 | goto err_standby; |
635 | } |
636 | } |
637 | |
638 | ret = iio_device_register(indio_dev); |
639 | if (ret < 0) { |
640 | dev_err(&client->dev, "device_register failed\n" ); |
641 | goto err_standby; |
642 | } |
643 | |
644 | return 0; |
645 | |
646 | err_standby: |
647 | stk3310_set_state(data, STK3310_STATE_STANDBY); |
648 | return ret; |
649 | } |
650 | |
651 | static void stk3310_remove(struct i2c_client *client) |
652 | { |
653 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
654 | |
655 | iio_device_unregister(indio_dev); |
656 | stk3310_set_state(data: iio_priv(indio_dev), STK3310_STATE_STANDBY); |
657 | } |
658 | |
659 | static int stk3310_suspend(struct device *dev) |
660 | { |
661 | struct stk3310_data *data; |
662 | |
663 | data = iio_priv(indio_dev: i2c_get_clientdata(to_i2c_client(dev))); |
664 | |
665 | return stk3310_set_state(data, STK3310_STATE_STANDBY); |
666 | } |
667 | |
668 | static int stk3310_resume(struct device *dev) |
669 | { |
670 | u8 state = 0; |
671 | struct stk3310_data *data; |
672 | |
673 | data = iio_priv(indio_dev: i2c_get_clientdata(to_i2c_client(dev))); |
674 | if (data->ps_enabled) |
675 | state |= STK3310_STATE_EN_PS; |
676 | if (data->als_enabled) |
677 | state |= STK3310_STATE_EN_ALS; |
678 | |
679 | return stk3310_set_state(data, state); |
680 | } |
681 | |
682 | static DEFINE_SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend, |
683 | stk3310_resume); |
684 | |
685 | static const struct i2c_device_id stk3310_i2c_id[] = { |
686 | {"STK3310" , 0}, |
687 | {"STK3311" , 0}, |
688 | {"STK3335" , 0}, |
689 | {} |
690 | }; |
691 | MODULE_DEVICE_TABLE(i2c, stk3310_i2c_id); |
692 | |
693 | static const struct acpi_device_id stk3310_acpi_id[] = { |
694 | {"STK3310" , 0}, |
695 | {"STK3311" , 0}, |
696 | {"STK3335" , 0}, |
697 | {} |
698 | }; |
699 | |
700 | MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id); |
701 | |
702 | static const struct of_device_id stk3310_of_match[] = { |
703 | { .compatible = "sensortek,stk3310" , }, |
704 | { .compatible = "sensortek,stk3311" , }, |
705 | { .compatible = "sensortek,stk3335" , }, |
706 | {} |
707 | }; |
708 | MODULE_DEVICE_TABLE(of, stk3310_of_match); |
709 | |
710 | static struct i2c_driver stk3310_driver = { |
711 | .driver = { |
712 | .name = "stk3310" , |
713 | .of_match_table = stk3310_of_match, |
714 | .pm = pm_sleep_ptr(&stk3310_pm_ops), |
715 | .acpi_match_table = ACPI_PTR(stk3310_acpi_id), |
716 | }, |
717 | .probe = stk3310_probe, |
718 | .remove = stk3310_remove, |
719 | .id_table = stk3310_i2c_id, |
720 | }; |
721 | |
722 | module_i2c_driver(stk3310_driver); |
723 | |
724 | MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>" ); |
725 | MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver" ); |
726 | MODULE_LICENSE("GPL v2" ); |
727 | |