1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Device driver for monitoring ambient light intensity in (lux) and proximity
4 * detection (prox) within the TAOS TSL2571, TSL2671, TMD2671, TSL2771, TMD2771,
5 * TSL2572, TSL2672, TMD2672, TSL2772, and TMD2772 devices.
6 *
7 * Copyright (c) 2012, TAOS Corporation.
8 * Copyright (c) 2017-2018 Brian Masney <masneyb@onstation.org>
9 */
10
11 #include <linux/delay.h>
12 #include <linux/errno.h>
13 #include <linux/i2c.h>
14 #include <linux/interrupt.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/mutex.h>
18 #include <linux/slab.h>
19 #include <linux/iio/events.h>
20 #include <linux/iio/iio.h>
21 #include <linux/iio/sysfs.h>
22 #include <linux/platform_data/tsl2772.h>
23 #include <linux/regulator/consumer.h>
24
25 /* Cal defs */
26 #define PROX_STAT_CAL 0
27 #define PROX_STAT_SAMP 1
28 #define MAX_SAMPLES_CAL 200
29
30 /* TSL2772 Device ID */
31 #define TRITON_ID 0x00
32 #define SWORDFISH_ID 0x30
33 #define HALIBUT_ID 0x20
34
35 /* Lux calculation constants */
36 #define TSL2772_LUX_CALC_OVER_FLOW 65535
37
38 /*
39 * TAOS Register definitions - Note: depending on device, some of these register
40 * are not used and the register address is benign.
41 */
42
43 /* Register offsets */
44 #define TSL2772_MAX_CONFIG_REG 16
45
46 /* Device Registers and Masks */
47 #define TSL2772_CNTRL 0x00
48 #define TSL2772_ALS_TIME 0X01
49 #define TSL2772_PRX_TIME 0x02
50 #define TSL2772_WAIT_TIME 0x03
51 #define TSL2772_ALS_MINTHRESHLO 0X04
52 #define TSL2772_ALS_MINTHRESHHI 0X05
53 #define TSL2772_ALS_MAXTHRESHLO 0X06
54 #define TSL2772_ALS_MAXTHRESHHI 0X07
55 #define TSL2772_PRX_MINTHRESHLO 0X08
56 #define TSL2772_PRX_MINTHRESHHI 0X09
57 #define TSL2772_PRX_MAXTHRESHLO 0X0A
58 #define TSL2772_PRX_MAXTHRESHHI 0X0B
59 #define TSL2772_PERSISTENCE 0x0C
60 #define TSL2772_ALS_PRX_CONFIG 0x0D
61 #define TSL2772_PRX_COUNT 0x0E
62 #define TSL2772_GAIN 0x0F
63 #define TSL2772_NOTUSED 0x10
64 #define TSL2772_REVID 0x11
65 #define TSL2772_CHIPID 0x12
66 #define TSL2772_STATUS 0x13
67 #define TSL2772_ALS_CHAN0LO 0x14
68 #define TSL2772_ALS_CHAN0HI 0x15
69 #define TSL2772_ALS_CHAN1LO 0x16
70 #define TSL2772_ALS_CHAN1HI 0x17
71 #define TSL2772_PRX_LO 0x18
72 #define TSL2772_PRX_HI 0x19
73
74 /* tsl2772 cmd reg masks */
75 #define TSL2772_CMD_REG 0x80
76 #define TSL2772_CMD_SPL_FN 0x60
77 #define TSL2772_CMD_REPEAT_PROTO 0x00
78 #define TSL2772_CMD_AUTOINC_PROTO 0x20
79
80 #define TSL2772_CMD_PROX_INT_CLR 0X05
81 #define TSL2772_CMD_ALS_INT_CLR 0x06
82 #define TSL2772_CMD_PROXALS_INT_CLR 0X07
83
84 /* tsl2772 cntrl reg masks */
85 #define TSL2772_CNTL_ADC_ENBL 0x02
86 #define TSL2772_CNTL_PWR_ON 0x01
87
88 /* tsl2772 status reg masks */
89 #define TSL2772_STA_ADC_VALID 0x01
90 #define TSL2772_STA_PRX_VALID 0x02
91 #define TSL2772_STA_ADC_PRX_VALID (TSL2772_STA_ADC_VALID | \
92 TSL2772_STA_PRX_VALID)
93 #define TSL2772_STA_ALS_INTR 0x10
94 #define TSL2772_STA_PRX_INTR 0x20
95
96 /* tsl2772 cntrl reg masks */
97 #define TSL2772_CNTL_REG_CLEAR 0x00
98 #define TSL2772_CNTL_PROX_INT_ENBL 0X20
99 #define TSL2772_CNTL_ALS_INT_ENBL 0X10
100 #define TSL2772_CNTL_WAIT_TMR_ENBL 0X08
101 #define TSL2772_CNTL_PROX_DET_ENBL 0X04
102 #define TSL2772_CNTL_PWRON 0x01
103 #define TSL2772_CNTL_ALSPON_ENBL 0x03
104 #define TSL2772_CNTL_INTALSPON_ENBL 0x13
105 #define TSL2772_CNTL_PROXPON_ENBL 0x0F
106 #define TSL2772_CNTL_INTPROXPON_ENBL 0x2F
107
108 #define TSL2772_ALS_GAIN_TRIM_MIN 250
109 #define TSL2772_ALS_GAIN_TRIM_MAX 4000
110
111 #define TSL2772_MAX_PROX_LEDS 2
112
113 #define TSL2772_BOOT_MIN_SLEEP_TIME 10000
114 #define TSL2772_BOOT_MAX_SLEEP_TIME 28000
115
116 /* Device family members */
117 enum {
118 tsl2571,
119 tsl2671,
120 tmd2671,
121 tsl2771,
122 tmd2771,
123 tsl2572,
124 tsl2672,
125 tmd2672,
126 tsl2772,
127 tmd2772,
128 apds9930,
129 };
130
131 enum {
132 TSL2772_CHIP_UNKNOWN = 0,
133 TSL2772_CHIP_WORKING = 1,
134 TSL2772_CHIP_SUSPENDED = 2
135 };
136
137 enum {
138 TSL2772_SUPPLY_VDD = 0,
139 TSL2772_SUPPLY_VDDIO = 1,
140 TSL2772_NUM_SUPPLIES = 2
141 };
142
143 /* Per-device data */
144 struct tsl2772_als_info {
145 u16 als_ch0;
146 u16 als_ch1;
147 u16 lux;
148 };
149
150 struct tsl2772_chip_info {
151 int chan_table_elements;
152 struct iio_chan_spec channel_with_events[4];
153 struct iio_chan_spec channel_without_events[4];
154 const struct iio_info *info;
155 };
156
157 static const int tsl2772_led_currents[][2] = {
158 { 100000, TSL2772_100_mA },
159 { 50000, TSL2772_50_mA },
160 { 25000, TSL2772_25_mA },
161 { 13000, TSL2772_13_mA },
162 { 0, 0 }
163 };
164
165 struct tsl2772_chip {
166 kernel_ulong_t id;
167 struct mutex prox_mutex;
168 struct mutex als_mutex;
169 struct i2c_client *client;
170 struct regulator_bulk_data supplies[TSL2772_NUM_SUPPLIES];
171 u16 prox_data;
172 struct tsl2772_als_info als_cur_info;
173 struct tsl2772_settings settings;
174 struct tsl2772_platform_data *pdata;
175 int als_gain_time_scale;
176 int als_saturation;
177 int tsl2772_chip_status;
178 u8 tsl2772_config[TSL2772_MAX_CONFIG_REG];
179 const struct tsl2772_chip_info *chip_info;
180 const struct iio_info *info;
181 s64 event_timestamp;
182 /*
183 * This structure is intentionally large to accommodate
184 * updates via sysfs.
185 * Sized to 9 = max 8 segments + 1 termination segment
186 */
187 struct tsl2772_lux tsl2772_device_lux[TSL2772_MAX_LUX_TABLE_SIZE];
188 };
189
190 /*
191 * Different devices require different coefficents, and these numbers were
192 * derived from the 'Lux Equation' section of the various device datasheets.
193 * All of these coefficients assume a Glass Attenuation (GA) factor of 1.
194 * The coefficients are multiplied by 1000 to avoid floating point operations.
195 * The two rows in each table correspond to the Lux1 and Lux2 equations from
196 * the datasheets.
197 */
198 static const struct tsl2772_lux tsl2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
199 { 53000, 106000 },
200 { 31800, 53000 },
201 { 0, 0 },
202 };
203
204 static const struct tsl2772_lux tmd2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
205 { 24000, 48000 },
206 { 14400, 24000 },
207 { 0, 0 },
208 };
209
210 static const struct tsl2772_lux tsl2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
211 { 60000, 112200 },
212 { 37800, 60000 },
213 { 0, 0 },
214 };
215
216 static const struct tsl2772_lux tmd2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
217 { 20000, 35000 },
218 { 12600, 20000 },
219 { 0, 0 },
220 };
221
222 static const struct tsl2772_lux apds9930_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
223 { 52000, 96824 },
224 { 38792, 67132 },
225 { 0, 0 },
226 };
227
228 static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = {
229 [tsl2571] = tsl2x71_lux_table,
230 [tsl2671] = tsl2x71_lux_table,
231 [tmd2671] = tmd2x71_lux_table,
232 [tsl2771] = tsl2x71_lux_table,
233 [tmd2771] = tmd2x71_lux_table,
234 [tsl2572] = tsl2x72_lux_table,
235 [tsl2672] = tsl2x72_lux_table,
236 [tmd2672] = tmd2x72_lux_table,
237 [tsl2772] = tsl2x72_lux_table,
238 [tmd2772] = tmd2x72_lux_table,
239 [apds9930] = apds9930_lux_table,
240 };
241
242 static const struct tsl2772_settings tsl2772_default_settings = {
243 .als_time = 255, /* 2.72 / 2.73 ms */
244 .als_gain = 0,
245 .prox_time = 255, /* 2.72 / 2.73 ms */
246 .prox_gain = 0,
247 .wait_time = 255,
248 .als_prox_config = 0,
249 .als_gain_trim = 1000,
250 .als_cal_target = 150,
251 .als_persistence = 1,
252 .als_interrupt_en = false,
253 .als_thresh_low = 200,
254 .als_thresh_high = 256,
255 .prox_persistence = 1,
256 .prox_interrupt_en = false,
257 .prox_thres_low = 0,
258 .prox_thres_high = 512,
259 .prox_max_samples_cal = 30,
260 .prox_pulse_count = 8,
261 .prox_diode = TSL2772_DIODE1,
262 .prox_power = TSL2772_100_mA
263 };
264
265 static const s16 tsl2772_als_gain[] = {
266 1,
267 8,
268 16,
269 120
270 };
271
272 static const s16 tsl2772_prox_gain[] = {
273 1,
274 2,
275 4,
276 8
277 };
278
279 static const int tsl2772_int_time_avail[][6] = {
280 [tsl2571] = { 0, 2720, 0, 2720, 0, 696000 },
281 [tsl2671] = { 0, 2720, 0, 2720, 0, 696000 },
282 [tmd2671] = { 0, 2720, 0, 2720, 0, 696000 },
283 [tsl2771] = { 0, 2720, 0, 2720, 0, 696000 },
284 [tmd2771] = { 0, 2720, 0, 2720, 0, 696000 },
285 [tsl2572] = { 0, 2730, 0, 2730, 0, 699000 },
286 [tsl2672] = { 0, 2730, 0, 2730, 0, 699000 },
287 [tmd2672] = { 0, 2730, 0, 2730, 0, 699000 },
288 [tsl2772] = { 0, 2730, 0, 2730, 0, 699000 },
289 [tmd2772] = { 0, 2730, 0, 2730, 0, 699000 },
290 [apds9930] = { 0, 2730, 0, 2730, 0, 699000 },
291 };
292
293 static int tsl2772_int_calibscale_avail[] = { 1, 8, 16, 120 };
294
295 static int tsl2772_prox_calibscale_avail[] = { 1, 2, 4, 8 };
296
297 /* Channel variations */
298 enum {
299 ALS,
300 PRX,
301 ALSPRX,
302 PRX2,
303 ALSPRX2,
304 };
305
306 static const u8 device_channel_config[] = {
307 [tsl2571] = ALS,
308 [tsl2671] = PRX,
309 [tmd2671] = PRX,
310 [tsl2771] = ALSPRX,
311 [tmd2771] = ALSPRX,
312 [tsl2572] = ALS,
313 [tsl2672] = PRX2,
314 [tmd2672] = PRX2,
315 [tsl2772] = ALSPRX2,
316 [tmd2772] = ALSPRX2,
317 [apds9930] = ALSPRX2,
318 };
319
tsl2772_read_status(struct tsl2772_chip * chip)320 static int tsl2772_read_status(struct tsl2772_chip *chip)
321 {
322 int ret;
323
324 ret = i2c_smbus_read_byte_data(chip->client,
325 TSL2772_CMD_REG | TSL2772_STATUS);
326 if (ret < 0)
327 dev_err(&chip->client->dev,
328 "%s: failed to read STATUS register: %d\n", __func__,
329 ret);
330
331 return ret;
332 }
333
tsl2772_write_control_reg(struct tsl2772_chip * chip,u8 data)334 static int tsl2772_write_control_reg(struct tsl2772_chip *chip, u8 data)
335 {
336 int ret;
337
338 ret = i2c_smbus_write_byte_data(chip->client,
339 TSL2772_CMD_REG | TSL2772_CNTRL, data);
340 if (ret < 0) {
341 dev_err(&chip->client->dev,
342 "%s: failed to write to control register %x: %d\n",
343 __func__, data, ret);
344 }
345
346 return ret;
347 }
348
tsl2772_read_autoinc_regs(struct tsl2772_chip * chip,int lower_reg,int upper_reg)349 static int tsl2772_read_autoinc_regs(struct tsl2772_chip *chip, int lower_reg,
350 int upper_reg)
351 {
352 u8 buf[2];
353 int ret;
354
355 ret = i2c_smbus_write_byte(chip->client,
356 TSL2772_CMD_REG | TSL2772_CMD_AUTOINC_PROTO |
357 lower_reg);
358 if (ret < 0) {
359 dev_err(&chip->client->dev,
360 "%s: failed to enable auto increment protocol: %d\n",
361 __func__, ret);
362 return ret;
363 }
364
365 ret = i2c_smbus_read_byte_data(chip->client,
366 TSL2772_CMD_REG | lower_reg);
367 if (ret < 0) {
368 dev_err(&chip->client->dev,
369 "%s: failed to read from register %x: %d\n", __func__,
370 lower_reg, ret);
371 return ret;
372 }
373 buf[0] = ret;
374
375 ret = i2c_smbus_read_byte_data(chip->client,
376 TSL2772_CMD_REG | upper_reg);
377 if (ret < 0) {
378 dev_err(&chip->client->dev,
379 "%s: failed to read from register %x: %d\n", __func__,
380 upper_reg, ret);
381 return ret;
382 }
383 buf[1] = ret;
384
385 ret = i2c_smbus_write_byte(chip->client,
386 TSL2772_CMD_REG | TSL2772_CMD_REPEAT_PROTO |
387 lower_reg);
388 if (ret < 0) {
389 dev_err(&chip->client->dev,
390 "%s: failed to enable repeated byte protocol: %d\n",
391 __func__, ret);
392 return ret;
393 }
394
395 return le16_to_cpup((const __le16 *)&buf[0]);
396 }
397
398 /**
399 * tsl2772_get_lux() - Reads and calculates current lux value.
400 * @indio_dev: pointer to IIO device
401 *
402 * The raw ch0 and ch1 values of the ambient light sensed in the last
403 * integration cycle are read from the device. The raw values are multiplied
404 * by a device-specific scale factor, and divided by the integration time and
405 * device gain. The code supports multiple lux equations through the lux table
406 * coefficients. A lux gain trim is applied to each lux equation, and then the
407 * maximum lux within the interval 0..65535 is selected.
408 */
tsl2772_get_lux(struct iio_dev * indio_dev)409 static int tsl2772_get_lux(struct iio_dev *indio_dev)
410 {
411 struct tsl2772_chip *chip = iio_priv(indio_dev);
412 struct tsl2772_lux *p;
413 int max_lux, ret;
414 bool overflow;
415
416 mutex_lock(&chip->als_mutex);
417
418 if (chip->tsl2772_chip_status != TSL2772_CHIP_WORKING) {
419 dev_err(&chip->client->dev, "%s: device is not enabled\n",
420 __func__);
421 ret = -EBUSY;
422 goto out_unlock;
423 }
424
425 ret = tsl2772_read_status(chip);
426 if (ret < 0)
427 goto out_unlock;
428
429 if (!(ret & TSL2772_STA_ADC_VALID)) {
430 dev_err(&chip->client->dev,
431 "%s: data not valid yet\n", __func__);
432 ret = chip->als_cur_info.lux; /* return LAST VALUE */
433 goto out_unlock;
434 }
435
436 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN0LO,
437 TSL2772_ALS_CHAN0HI);
438 if (ret < 0)
439 goto out_unlock;
440 chip->als_cur_info.als_ch0 = ret;
441
442 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN1LO,
443 TSL2772_ALS_CHAN1HI);
444 if (ret < 0)
445 goto out_unlock;
446 chip->als_cur_info.als_ch1 = ret;
447
448 if (chip->als_cur_info.als_ch0 >= chip->als_saturation) {
449 max_lux = TSL2772_LUX_CALC_OVER_FLOW;
450 goto update_struct_with_max_lux;
451 }
452
453 if (!chip->als_cur_info.als_ch0) {
454 /* have no data, so return LAST VALUE */
455 ret = chip->als_cur_info.lux;
456 goto out_unlock;
457 }
458
459 max_lux = 0;
460 overflow = false;
461 for (p = (struct tsl2772_lux *)chip->tsl2772_device_lux; p->ch0 != 0;
462 p++) {
463 int lux;
464
465 lux = ((chip->als_cur_info.als_ch0 * p->ch0) -
466 (chip->als_cur_info.als_ch1 * p->ch1)) /
467 chip->als_gain_time_scale;
468
469 /*
470 * The als_gain_trim can have a value within the range 250..4000
471 * and is a multiplier for the lux. A trim of 1000 makes no
472 * changes to the lux, less than 1000 scales it down, and
473 * greater than 1000 scales it up.
474 */
475 lux = (lux * chip->settings.als_gain_trim) / 1000;
476
477 if (lux > TSL2772_LUX_CALC_OVER_FLOW) {
478 overflow = true;
479 continue;
480 }
481
482 max_lux = max(max_lux, lux);
483 }
484
485 if (overflow && max_lux == 0)
486 max_lux = TSL2772_LUX_CALC_OVER_FLOW;
487
488 update_struct_with_max_lux:
489 chip->als_cur_info.lux = max_lux;
490 ret = max_lux;
491
492 out_unlock:
493 mutex_unlock(&chip->als_mutex);
494
495 return ret;
496 }
497
498 /**
499 * tsl2772_get_prox() - Reads proximity data registers and updates
500 * chip->prox_data.
501 *
502 * @indio_dev: pointer to IIO device
503 */
tsl2772_get_prox(struct iio_dev * indio_dev)504 static int tsl2772_get_prox(struct iio_dev *indio_dev)
505 {
506 struct tsl2772_chip *chip = iio_priv(indio_dev);
507 int ret;
508
509 mutex_lock(&chip->prox_mutex);
510
511 ret = tsl2772_read_status(chip);
512 if (ret < 0)
513 goto prox_poll_err;
514
515 switch (chip->id) {
516 case tsl2571:
517 case tsl2671:
518 case tmd2671:
519 case tsl2771:
520 case tmd2771:
521 if (!(ret & TSL2772_STA_ADC_VALID)) {
522 ret = -EINVAL;
523 goto prox_poll_err;
524 }
525 break;
526 case tsl2572:
527 case tsl2672:
528 case tmd2672:
529 case tsl2772:
530 case tmd2772:
531 case apds9930:
532 if (!(ret & TSL2772_STA_PRX_VALID)) {
533 ret = -EINVAL;
534 goto prox_poll_err;
535 }
536 break;
537 }
538
539 ret = tsl2772_read_autoinc_regs(chip, TSL2772_PRX_LO, TSL2772_PRX_HI);
540 if (ret < 0)
541 goto prox_poll_err;
542 chip->prox_data = ret;
543
544 prox_poll_err:
545 mutex_unlock(&chip->prox_mutex);
546
547 return ret;
548 }
549
tsl2772_read_prox_led_current(struct tsl2772_chip * chip)550 static int tsl2772_read_prox_led_current(struct tsl2772_chip *chip)
551 {
552 struct device_node *of_node = chip->client->dev.of_node;
553 int ret, tmp, i;
554
555 ret = of_property_read_u32(of_node, "led-max-microamp", &tmp);
556 if (ret < 0)
557 return ret;
558
559 for (i = 0; tsl2772_led_currents[i][0] != 0; i++) {
560 if (tmp == tsl2772_led_currents[i][0]) {
561 chip->settings.prox_power = tsl2772_led_currents[i][1];
562 return 0;
563 }
564 }
565
566 dev_err(&chip->client->dev, "Invalid value %d for led-max-microamp\n",
567 tmp);
568
569 return -EINVAL;
570
571 }
572
tsl2772_read_prox_diodes(struct tsl2772_chip * chip)573 static int tsl2772_read_prox_diodes(struct tsl2772_chip *chip)
574 {
575 struct device_node *of_node = chip->client->dev.of_node;
576 int i, ret, num_leds, prox_diode_mask;
577 u32 leds[TSL2772_MAX_PROX_LEDS];
578
579 ret = of_property_count_u32_elems(of_node, "amstaos,proximity-diodes");
580 if (ret < 0)
581 return ret;
582
583 num_leds = ret;
584 if (num_leds > TSL2772_MAX_PROX_LEDS)
585 num_leds = TSL2772_MAX_PROX_LEDS;
586
587 ret = of_property_read_u32_array(of_node, "amstaos,proximity-diodes",
588 leds, num_leds);
589 if (ret < 0) {
590 dev_err(&chip->client->dev,
591 "Invalid value for amstaos,proximity-diodes: %d.\n",
592 ret);
593 return ret;
594 }
595
596 prox_diode_mask = 0;
597 for (i = 0; i < num_leds; i++) {
598 if (leds[i] == 0)
599 prox_diode_mask |= TSL2772_DIODE0;
600 else if (leds[i] == 1)
601 prox_diode_mask |= TSL2772_DIODE1;
602 else {
603 dev_err(&chip->client->dev,
604 "Invalid value %d in amstaos,proximity-diodes.\n",
605 leds[i]);
606 return -EINVAL;
607 }
608 }
609 chip->settings.prox_diode = prox_diode_mask;
610
611 return 0;
612 }
613
tsl2772_parse_dt(struct tsl2772_chip * chip)614 static void tsl2772_parse_dt(struct tsl2772_chip *chip)
615 {
616 tsl2772_read_prox_led_current(chip);
617 tsl2772_read_prox_diodes(chip);
618 }
619
620 /**
621 * tsl2772_defaults() - Populates the device nominal operating parameters
622 * with those provided by a 'platform' data struct or
623 * with prefined defaults.
624 *
625 * @chip: pointer to device structure.
626 */
tsl2772_defaults(struct tsl2772_chip * chip)627 static void tsl2772_defaults(struct tsl2772_chip *chip)
628 {
629 /* If Operational settings defined elsewhere.. */
630 if (chip->pdata && chip->pdata->platform_default_settings)
631 memcpy(&chip->settings, chip->pdata->platform_default_settings,
632 sizeof(tsl2772_default_settings));
633 else
634 memcpy(&chip->settings, &tsl2772_default_settings,
635 sizeof(tsl2772_default_settings));
636
637 /* Load up the proper lux table. */
638 if (chip->pdata && chip->pdata->platform_lux_table[0].ch0 != 0)
639 memcpy(chip->tsl2772_device_lux,
640 chip->pdata->platform_lux_table,
641 sizeof(chip->pdata->platform_lux_table));
642 else
643 memcpy(chip->tsl2772_device_lux,
644 tsl2772_default_lux_table_group[chip->id],
645 TSL2772_DEFAULT_TABLE_BYTES);
646
647 tsl2772_parse_dt(chip);
648 }
649
650 /**
651 * tsl2772_als_calibrate() - Obtain single reading and calculate
652 * the als_gain_trim.
653 *
654 * @indio_dev: pointer to IIO device
655 */
tsl2772_als_calibrate(struct iio_dev * indio_dev)656 static int tsl2772_als_calibrate(struct iio_dev *indio_dev)
657 {
658 struct tsl2772_chip *chip = iio_priv(indio_dev);
659 int ret, lux_val;
660
661 ret = i2c_smbus_read_byte_data(chip->client,
662 TSL2772_CMD_REG | TSL2772_CNTRL);
663 if (ret < 0) {
664 dev_err(&chip->client->dev,
665 "%s: failed to read from the CNTRL register\n",
666 __func__);
667 return ret;
668 }
669
670 if ((ret & (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON))
671 != (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) {
672 dev_err(&chip->client->dev,
673 "%s: Device is not powered on and/or ADC is not enabled\n",
674 __func__);
675 return -EINVAL;
676 } else if ((ret & TSL2772_STA_ADC_VALID) != TSL2772_STA_ADC_VALID) {
677 dev_err(&chip->client->dev,
678 "%s: The two ADC channels have not completed an integration cycle\n",
679 __func__);
680 return -ENODATA;
681 }
682
683 lux_val = tsl2772_get_lux(indio_dev);
684 if (lux_val < 0) {
685 dev_err(&chip->client->dev,
686 "%s: failed to get lux\n", __func__);
687 return lux_val;
688 }
689 if (lux_val == 0)
690 return -ERANGE;
691
692 ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) /
693 lux_val;
694 if (ret < TSL2772_ALS_GAIN_TRIM_MIN || ret > TSL2772_ALS_GAIN_TRIM_MAX)
695 return -ERANGE;
696
697 chip->settings.als_gain_trim = ret;
698
699 return ret;
700 }
701
tsl2772_disable_regulators_action(void * _data)702 static void tsl2772_disable_regulators_action(void *_data)
703 {
704 struct tsl2772_chip *chip = _data;
705
706 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies);
707 }
708
tsl2772_chip_on(struct iio_dev * indio_dev)709 static int tsl2772_chip_on(struct iio_dev *indio_dev)
710 {
711 struct tsl2772_chip *chip = iio_priv(indio_dev);
712 int ret, i, als_count, als_time_us;
713 u8 *dev_reg, reg_val;
714
715 /* Non calculated parameters */
716 chip->tsl2772_config[TSL2772_ALS_TIME] = chip->settings.als_time;
717 chip->tsl2772_config[TSL2772_PRX_TIME] = chip->settings.prox_time;
718 chip->tsl2772_config[TSL2772_WAIT_TIME] = chip->settings.wait_time;
719 chip->tsl2772_config[TSL2772_ALS_PRX_CONFIG] =
720 chip->settings.als_prox_config;
721
722 chip->tsl2772_config[TSL2772_ALS_MINTHRESHLO] =
723 (chip->settings.als_thresh_low) & 0xFF;
724 chip->tsl2772_config[TSL2772_ALS_MINTHRESHHI] =
725 (chip->settings.als_thresh_low >> 8) & 0xFF;
726 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHLO] =
727 (chip->settings.als_thresh_high) & 0xFF;
728 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHHI] =
729 (chip->settings.als_thresh_high >> 8) & 0xFF;
730 chip->tsl2772_config[TSL2772_PERSISTENCE] =
731 (chip->settings.prox_persistence & 0xFF) << 4 |
732 (chip->settings.als_persistence & 0xFF);
733
734 chip->tsl2772_config[TSL2772_PRX_COUNT] =
735 chip->settings.prox_pulse_count;
736 chip->tsl2772_config[TSL2772_PRX_MINTHRESHLO] =
737 (chip->settings.prox_thres_low) & 0xFF;
738 chip->tsl2772_config[TSL2772_PRX_MINTHRESHHI] =
739 (chip->settings.prox_thres_low >> 8) & 0xFF;
740 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHLO] =
741 (chip->settings.prox_thres_high) & 0xFF;
742 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHHI] =
743 (chip->settings.prox_thres_high >> 8) & 0xFF;
744
745 /* and make sure we're not already on */
746 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) {
747 /* if forcing a register update - turn off, then on */
748 dev_info(&chip->client->dev, "device is already enabled\n");
749 return -EINVAL;
750 }
751
752 /* Set the gain based on tsl2772_settings struct */
753 chip->tsl2772_config[TSL2772_GAIN] =
754 (chip->settings.als_gain & 0xFF) |
755 ((chip->settings.prox_gain & 0xFF) << 2) |
756 (chip->settings.prox_diode << 4) |
757 (chip->settings.prox_power << 6);
758
759 /* set chip time scaling and saturation */
760 als_count = 256 - chip->settings.als_time;
761 als_time_us = als_count * tsl2772_int_time_avail[chip->id][3];
762 chip->als_saturation = als_count * 768; /* 75% of full scale */
763 chip->als_gain_time_scale = als_time_us *
764 tsl2772_als_gain[chip->settings.als_gain];
765
766 /*
767 * TSL2772 Specific power-on / adc enable sequence
768 * Power on the device 1st.
769 */
770 ret = tsl2772_write_control_reg(chip, TSL2772_CNTL_PWR_ON);
771 if (ret < 0)
772 return ret;
773
774 /*
775 * Use the following shadow copy for our delay before enabling ADC.
776 * Write all the registers.
777 */
778 for (i = 0, dev_reg = chip->tsl2772_config;
779 i < TSL2772_MAX_CONFIG_REG; i++) {
780 int reg = TSL2772_CMD_REG + i;
781
782 ret = i2c_smbus_write_byte_data(chip->client, reg,
783 *dev_reg++);
784 if (ret < 0) {
785 dev_err(&chip->client->dev,
786 "%s: failed to write to register %x: %d\n",
787 __func__, reg, ret);
788 return ret;
789 }
790 }
791
792 /* Power-on settling time */
793 usleep_range(3000, 3500);
794
795 reg_val = TSL2772_CNTL_PWR_ON | TSL2772_CNTL_ADC_ENBL |
796 TSL2772_CNTL_PROX_DET_ENBL;
797 if (chip->settings.als_interrupt_en)
798 reg_val |= TSL2772_CNTL_ALS_INT_ENBL;
799 if (chip->settings.prox_interrupt_en)
800 reg_val |= TSL2772_CNTL_PROX_INT_ENBL;
801
802 ret = tsl2772_write_control_reg(chip, reg_val);
803 if (ret < 0)
804 return ret;
805
806 ret = i2c_smbus_write_byte(chip->client,
807 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN |
808 TSL2772_CMD_PROXALS_INT_CLR);
809 if (ret < 0) {
810 dev_err(&chip->client->dev,
811 "%s: failed to clear interrupt status: %d\n",
812 __func__, ret);
813 return ret;
814 }
815
816 chip->tsl2772_chip_status = TSL2772_CHIP_WORKING;
817
818 return ret;
819 }
820
tsl2772_chip_off(struct iio_dev * indio_dev)821 static int tsl2772_chip_off(struct iio_dev *indio_dev)
822 {
823 struct tsl2772_chip *chip = iio_priv(indio_dev);
824
825 /* turn device off */
826 chip->tsl2772_chip_status = TSL2772_CHIP_SUSPENDED;
827 return tsl2772_write_control_reg(chip, 0x00);
828 }
829
tsl2772_chip_off_action(void * data)830 static void tsl2772_chip_off_action(void *data)
831 {
832 struct iio_dev *indio_dev = data;
833
834 tsl2772_chip_off(indio_dev);
835 }
836
837 /**
838 * tsl2772_invoke_change - power cycle the device to implement the user
839 * parameters
840 * @indio_dev: pointer to IIO device
841 *
842 * Obtain and lock both ALS and PROX resources, determine and save device state
843 * (On/Off), cycle device to implement updated parameter, put device back into
844 * proper state, and unlock resource.
845 */
tsl2772_invoke_change(struct iio_dev * indio_dev)846 static int tsl2772_invoke_change(struct iio_dev *indio_dev)
847 {
848 struct tsl2772_chip *chip = iio_priv(indio_dev);
849 int device_status = chip->tsl2772_chip_status;
850 int ret;
851
852 mutex_lock(&chip->als_mutex);
853 mutex_lock(&chip->prox_mutex);
854
855 if (device_status == TSL2772_CHIP_WORKING) {
856 ret = tsl2772_chip_off(indio_dev);
857 if (ret < 0)
858 goto unlock;
859 }
860
861 ret = tsl2772_chip_on(indio_dev);
862
863 unlock:
864 mutex_unlock(&chip->prox_mutex);
865 mutex_unlock(&chip->als_mutex);
866
867 return ret;
868 }
869
tsl2772_prox_cal(struct iio_dev * indio_dev)870 static int tsl2772_prox_cal(struct iio_dev *indio_dev)
871 {
872 struct tsl2772_chip *chip = iio_priv(indio_dev);
873 int prox_history[MAX_SAMPLES_CAL + 1];
874 int i, ret, mean, max, sample_sum;
875
876 if (chip->settings.prox_max_samples_cal < 1 ||
877 chip->settings.prox_max_samples_cal > MAX_SAMPLES_CAL)
878 return -EINVAL;
879
880 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) {
881 usleep_range(15000, 17500);
882 ret = tsl2772_get_prox(indio_dev);
883 if (ret < 0)
884 return ret;
885
886 prox_history[i] = chip->prox_data;
887 }
888
889 sample_sum = 0;
890 max = INT_MIN;
891 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) {
892 sample_sum += prox_history[i];
893 max = max(max, prox_history[i]);
894 }
895 mean = sample_sum / chip->settings.prox_max_samples_cal;
896
897 chip->settings.prox_thres_high = (max << 1) - mean;
898
899 return tsl2772_invoke_change(indio_dev);
900 }
901
tsl2772_read_avail(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,const int ** vals,int * type,int * length,long mask)902 static int tsl2772_read_avail(struct iio_dev *indio_dev,
903 struct iio_chan_spec const *chan,
904 const int **vals, int *type, int *length,
905 long mask)
906 {
907 struct tsl2772_chip *chip = iio_priv(indio_dev);
908
909 switch (mask) {
910 case IIO_CHAN_INFO_CALIBSCALE:
911 if (chan->type == IIO_INTENSITY) {
912 *length = ARRAY_SIZE(tsl2772_int_calibscale_avail);
913 *vals = tsl2772_int_calibscale_avail;
914 } else {
915 *length = ARRAY_SIZE(tsl2772_prox_calibscale_avail);
916 *vals = tsl2772_prox_calibscale_avail;
917 }
918 *type = IIO_VAL_INT;
919 return IIO_AVAIL_LIST;
920 case IIO_CHAN_INFO_INT_TIME:
921 *length = ARRAY_SIZE(tsl2772_int_time_avail[chip->id]);
922 *vals = tsl2772_int_time_avail[chip->id];
923 *type = IIO_VAL_INT_PLUS_MICRO;
924 return IIO_AVAIL_RANGE;
925 }
926
927 return -EINVAL;
928 }
929
in_illuminance0_target_input_show(struct device * dev,struct device_attribute * attr,char * buf)930 static ssize_t in_illuminance0_target_input_show(struct device *dev,
931 struct device_attribute *attr,
932 char *buf)
933 {
934 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev));
935
936 return scnprintf(buf, PAGE_SIZE, "%d\n", chip->settings.als_cal_target);
937 }
938
in_illuminance0_target_input_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)939 static ssize_t in_illuminance0_target_input_store(struct device *dev,
940 struct device_attribute *attr,
941 const char *buf, size_t len)
942 {
943 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
944 struct tsl2772_chip *chip = iio_priv(indio_dev);
945 u16 value;
946 int ret;
947
948 if (kstrtou16(buf, 0, &value))
949 return -EINVAL;
950
951 chip->settings.als_cal_target = value;
952 ret = tsl2772_invoke_change(indio_dev);
953 if (ret < 0)
954 return ret;
955
956 return len;
957 }
958
in_illuminance0_calibrate_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)959 static ssize_t in_illuminance0_calibrate_store(struct device *dev,
960 struct device_attribute *attr,
961 const char *buf, size_t len)
962 {
963 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
964 bool value;
965 int ret;
966
967 if (kstrtobool(buf, &value) || !value)
968 return -EINVAL;
969
970 ret = tsl2772_als_calibrate(indio_dev);
971 if (ret < 0)
972 return ret;
973
974 ret = tsl2772_invoke_change(indio_dev);
975 if (ret < 0)
976 return ret;
977
978 return len;
979 }
980
in_illuminance0_lux_table_show(struct device * dev,struct device_attribute * attr,char * buf)981 static ssize_t in_illuminance0_lux_table_show(struct device *dev,
982 struct device_attribute *attr,
983 char *buf)
984 {
985 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev));
986 int i = 0;
987 int offset = 0;
988
989 while (i < TSL2772_MAX_LUX_TABLE_SIZE) {
990 offset += scnprintf(buf + offset, PAGE_SIZE - offset, "%u,%u,",
991 chip->tsl2772_device_lux[i].ch0,
992 chip->tsl2772_device_lux[i].ch1);
993 if (chip->tsl2772_device_lux[i].ch0 == 0) {
994 /*
995 * We just printed the first "0" entry.
996 * Now get rid of the extra "," and break.
997 */
998 offset--;
999 break;
1000 }
1001 i++;
1002 }
1003
1004 offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n");
1005 return offset;
1006 }
1007
in_illuminance0_lux_table_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)1008 static ssize_t in_illuminance0_lux_table_store(struct device *dev,
1009 struct device_attribute *attr,
1010 const char *buf, size_t len)
1011 {
1012 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1013 struct tsl2772_chip *chip = iio_priv(indio_dev);
1014 int value[ARRAY_SIZE(chip->tsl2772_device_lux) * 2 + 1];
1015 int n, ret;
1016
1017 get_options(buf, ARRAY_SIZE(value), value);
1018
1019 /*
1020 * We now have an array of ints starting at value[1], and
1021 * enumerated by value[0].
1022 * We expect each group of two ints to be one table entry,
1023 * and the last table entry is all 0.
1024 */
1025 n = value[0];
1026 if ((n % 2) || n < 4 ||
1027 n > ((ARRAY_SIZE(chip->tsl2772_device_lux) - 1) * 2))
1028 return -EINVAL;
1029
1030 if ((value[(n - 1)] | value[n]) != 0)
1031 return -EINVAL;
1032
1033 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) {
1034 ret = tsl2772_chip_off(indio_dev);
1035 if (ret < 0)
1036 return ret;
1037 }
1038
1039 /* Zero out the table */
1040 memset(chip->tsl2772_device_lux, 0, sizeof(chip->tsl2772_device_lux));
1041 memcpy(chip->tsl2772_device_lux, &value[1], (value[0] * 4));
1042
1043 ret = tsl2772_invoke_change(indio_dev);
1044 if (ret < 0)
1045 return ret;
1046
1047 return len;
1048 }
1049
in_proximity0_calibrate_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)1050 static ssize_t in_proximity0_calibrate_store(struct device *dev,
1051 struct device_attribute *attr,
1052 const char *buf, size_t len)
1053 {
1054 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1055 bool value;
1056 int ret;
1057
1058 if (kstrtobool(buf, &value) || !value)
1059 return -EINVAL;
1060
1061 ret = tsl2772_prox_cal(indio_dev);
1062 if (ret < 0)
1063 return ret;
1064
1065 ret = tsl2772_invoke_change(indio_dev);
1066 if (ret < 0)
1067 return ret;
1068
1069 return len;
1070 }
1071
tsl2772_read_interrupt_config(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir)1072 static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev,
1073 const struct iio_chan_spec *chan,
1074 enum iio_event_type type,
1075 enum iio_event_direction dir)
1076 {
1077 struct tsl2772_chip *chip = iio_priv(indio_dev);
1078
1079 if (chan->type == IIO_INTENSITY)
1080 return chip->settings.als_interrupt_en;
1081 else
1082 return chip->settings.prox_interrupt_en;
1083 }
1084
tsl2772_write_interrupt_config(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,int val)1085 static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev,
1086 const struct iio_chan_spec *chan,
1087 enum iio_event_type type,
1088 enum iio_event_direction dir,
1089 int val)
1090 {
1091 struct tsl2772_chip *chip = iio_priv(indio_dev);
1092
1093 if (chan->type == IIO_INTENSITY)
1094 chip->settings.als_interrupt_en = val ? true : false;
1095 else
1096 chip->settings.prox_interrupt_en = val ? true : false;
1097
1098 return tsl2772_invoke_change(indio_dev);
1099 }
1100
tsl2772_write_event_value(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)1101 static int tsl2772_write_event_value(struct iio_dev *indio_dev,
1102 const struct iio_chan_spec *chan,
1103 enum iio_event_type type,
1104 enum iio_event_direction dir,
1105 enum iio_event_info info,
1106 int val, int val2)
1107 {
1108 struct tsl2772_chip *chip = iio_priv(indio_dev);
1109 int ret = -EINVAL, count, persistence;
1110 u8 time;
1111
1112 switch (info) {
1113 case IIO_EV_INFO_VALUE:
1114 if (chan->type == IIO_INTENSITY) {
1115 switch (dir) {
1116 case IIO_EV_DIR_RISING:
1117 chip->settings.als_thresh_high = val;
1118 ret = 0;
1119 break;
1120 case IIO_EV_DIR_FALLING:
1121 chip->settings.als_thresh_low = val;
1122 ret = 0;
1123 break;
1124 default:
1125 break;
1126 }
1127 } else {
1128 switch (dir) {
1129 case IIO_EV_DIR_RISING:
1130 chip->settings.prox_thres_high = val;
1131 ret = 0;
1132 break;
1133 case IIO_EV_DIR_FALLING:
1134 chip->settings.prox_thres_low = val;
1135 ret = 0;
1136 break;
1137 default:
1138 break;
1139 }
1140 }
1141 break;
1142 case IIO_EV_INFO_PERIOD:
1143 if (chan->type == IIO_INTENSITY)
1144 time = chip->settings.als_time;
1145 else
1146 time = chip->settings.prox_time;
1147
1148 count = 256 - time;
1149 persistence = ((val * 1000000) + val2) /
1150 (count * tsl2772_int_time_avail[chip->id][3]);
1151
1152 if (chan->type == IIO_INTENSITY) {
1153 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */
1154 if (persistence > 3)
1155 persistence = (persistence / 5) + 3;
1156
1157 chip->settings.als_persistence = persistence;
1158 } else {
1159 chip->settings.prox_persistence = persistence;
1160 }
1161
1162 ret = 0;
1163 break;
1164 default:
1165 break;
1166 }
1167
1168 if (ret < 0)
1169 return ret;
1170
1171 return tsl2772_invoke_change(indio_dev);
1172 }
1173
tsl2772_read_event_value(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)1174 static int tsl2772_read_event_value(struct iio_dev *indio_dev,
1175 const struct iio_chan_spec *chan,
1176 enum iio_event_type type,
1177 enum iio_event_direction dir,
1178 enum iio_event_info info,
1179 int *val, int *val2)
1180 {
1181 struct tsl2772_chip *chip = iio_priv(indio_dev);
1182 int filter_delay, persistence;
1183 u8 time;
1184
1185 switch (info) {
1186 case IIO_EV_INFO_VALUE:
1187 if (chan->type == IIO_INTENSITY) {
1188 switch (dir) {
1189 case IIO_EV_DIR_RISING:
1190 *val = chip->settings.als_thresh_high;
1191 return IIO_VAL_INT;
1192 case IIO_EV_DIR_FALLING:
1193 *val = chip->settings.als_thresh_low;
1194 return IIO_VAL_INT;
1195 default:
1196 return -EINVAL;
1197 }
1198 } else {
1199 switch (dir) {
1200 case IIO_EV_DIR_RISING:
1201 *val = chip->settings.prox_thres_high;
1202 return IIO_VAL_INT;
1203 case IIO_EV_DIR_FALLING:
1204 *val = chip->settings.prox_thres_low;
1205 return IIO_VAL_INT;
1206 default:
1207 return -EINVAL;
1208 }
1209 }
1210 break;
1211 case IIO_EV_INFO_PERIOD:
1212 if (chan->type == IIO_INTENSITY) {
1213 time = chip->settings.als_time;
1214 persistence = chip->settings.als_persistence;
1215
1216 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */
1217 if (persistence > 3)
1218 persistence = (persistence - 3) * 5;
1219 } else {
1220 time = chip->settings.prox_time;
1221 persistence = chip->settings.prox_persistence;
1222 }
1223
1224 filter_delay = persistence * (256 - time) *
1225 tsl2772_int_time_avail[chip->id][3];
1226
1227 *val = filter_delay / 1000000;
1228 *val2 = filter_delay % 1000000;
1229 return IIO_VAL_INT_PLUS_MICRO;
1230 default:
1231 return -EINVAL;
1232 }
1233 }
1234
tsl2772_read_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2,long mask)1235 static int tsl2772_read_raw(struct iio_dev *indio_dev,
1236 struct iio_chan_spec const *chan,
1237 int *val,
1238 int *val2,
1239 long mask)
1240 {
1241 struct tsl2772_chip *chip = iio_priv(indio_dev);
1242
1243 switch (mask) {
1244 case IIO_CHAN_INFO_PROCESSED:
1245 switch (chan->type) {
1246 case IIO_LIGHT:
1247 tsl2772_get_lux(indio_dev);
1248 *val = chip->als_cur_info.lux;
1249 return IIO_VAL_INT;
1250 default:
1251 return -EINVAL;
1252 }
1253 case IIO_CHAN_INFO_RAW:
1254 switch (chan->type) {
1255 case IIO_INTENSITY:
1256 tsl2772_get_lux(indio_dev);
1257 if (chan->channel == 0)
1258 *val = chip->als_cur_info.als_ch0;
1259 else
1260 *val = chip->als_cur_info.als_ch1;
1261 return IIO_VAL_INT;
1262 case IIO_PROXIMITY:
1263 tsl2772_get_prox(indio_dev);
1264 *val = chip->prox_data;
1265 return IIO_VAL_INT;
1266 default:
1267 return -EINVAL;
1268 }
1269 break;
1270 case IIO_CHAN_INFO_CALIBSCALE:
1271 if (chan->type == IIO_LIGHT)
1272 *val = tsl2772_als_gain[chip->settings.als_gain];
1273 else
1274 *val = tsl2772_prox_gain[chip->settings.prox_gain];
1275 return IIO_VAL_INT;
1276 case IIO_CHAN_INFO_CALIBBIAS:
1277 *val = chip->settings.als_gain_trim;
1278 return IIO_VAL_INT;
1279 case IIO_CHAN_INFO_INT_TIME:
1280 *val = 0;
1281 *val2 = (256 - chip->settings.als_time) *
1282 tsl2772_int_time_avail[chip->id][3];
1283 return IIO_VAL_INT_PLUS_MICRO;
1284 default:
1285 return -EINVAL;
1286 }
1287 }
1288
tsl2772_write_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int val,int val2,long mask)1289 static int tsl2772_write_raw(struct iio_dev *indio_dev,
1290 struct iio_chan_spec const *chan,
1291 int val,
1292 int val2,
1293 long mask)
1294 {
1295 struct tsl2772_chip *chip = iio_priv(indio_dev);
1296
1297 switch (mask) {
1298 case IIO_CHAN_INFO_CALIBSCALE:
1299 if (chan->type == IIO_INTENSITY) {
1300 switch (val) {
1301 case 1:
1302 chip->settings.als_gain = 0;
1303 break;
1304 case 8:
1305 chip->settings.als_gain = 1;
1306 break;
1307 case 16:
1308 chip->settings.als_gain = 2;
1309 break;
1310 case 120:
1311 chip->settings.als_gain = 3;
1312 break;
1313 default:
1314 return -EINVAL;
1315 }
1316 } else {
1317 switch (val) {
1318 case 1:
1319 chip->settings.prox_gain = 0;
1320 break;
1321 case 2:
1322 chip->settings.prox_gain = 1;
1323 break;
1324 case 4:
1325 chip->settings.prox_gain = 2;
1326 break;
1327 case 8:
1328 chip->settings.prox_gain = 3;
1329 break;
1330 default:
1331 return -EINVAL;
1332 }
1333 }
1334 break;
1335 case IIO_CHAN_INFO_CALIBBIAS:
1336 if (val < TSL2772_ALS_GAIN_TRIM_MIN ||
1337 val > TSL2772_ALS_GAIN_TRIM_MAX)
1338 return -EINVAL;
1339
1340 chip->settings.als_gain_trim = val;
1341 break;
1342 case IIO_CHAN_INFO_INT_TIME:
1343 if (val != 0 || val2 < tsl2772_int_time_avail[chip->id][1] ||
1344 val2 > tsl2772_int_time_avail[chip->id][5])
1345 return -EINVAL;
1346
1347 chip->settings.als_time = 256 -
1348 (val2 / tsl2772_int_time_avail[chip->id][3]);
1349 break;
1350 default:
1351 return -EINVAL;
1352 }
1353
1354 return tsl2772_invoke_change(indio_dev);
1355 }
1356
1357 static DEVICE_ATTR_RW(in_illuminance0_target_input);
1358
1359 static DEVICE_ATTR_WO(in_illuminance0_calibrate);
1360
1361 static DEVICE_ATTR_WO(in_proximity0_calibrate);
1362
1363 static DEVICE_ATTR_RW(in_illuminance0_lux_table);
1364
1365 /* Use the default register values to identify the Taos device */
tsl2772_device_id_verif(int id,int target)1366 static int tsl2772_device_id_verif(int id, int target)
1367 {
1368 switch (target) {
1369 case tsl2571:
1370 case tsl2671:
1371 case tsl2771:
1372 return (id & 0xf0) == TRITON_ID;
1373 case tmd2671:
1374 case tmd2771:
1375 return (id & 0xf0) == HALIBUT_ID;
1376 case tsl2572:
1377 case tsl2672:
1378 case tmd2672:
1379 case tsl2772:
1380 case tmd2772:
1381 case apds9930:
1382 return (id & 0xf0) == SWORDFISH_ID;
1383 }
1384
1385 return -EINVAL;
1386 }
1387
tsl2772_event_handler(int irq,void * private)1388 static irqreturn_t tsl2772_event_handler(int irq, void *private)
1389 {
1390 struct iio_dev *indio_dev = private;
1391 struct tsl2772_chip *chip = iio_priv(indio_dev);
1392 s64 timestamp = iio_get_time_ns(indio_dev);
1393 int ret;
1394
1395 ret = tsl2772_read_status(chip);
1396 if (ret < 0)
1397 return IRQ_HANDLED;
1398
1399 /* What type of interrupt do we need to process */
1400 if (ret & TSL2772_STA_PRX_INTR) {
1401 iio_push_event(indio_dev,
1402 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
1403 0,
1404 IIO_EV_TYPE_THRESH,
1405 IIO_EV_DIR_EITHER),
1406 timestamp);
1407 }
1408
1409 if (ret & TSL2772_STA_ALS_INTR) {
1410 iio_push_event(indio_dev,
1411 IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
1412 0,
1413 IIO_EV_TYPE_THRESH,
1414 IIO_EV_DIR_EITHER),
1415 timestamp);
1416 }
1417
1418 ret = i2c_smbus_write_byte(chip->client,
1419 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN |
1420 TSL2772_CMD_PROXALS_INT_CLR);
1421 if (ret < 0)
1422 dev_err(&chip->client->dev,
1423 "%s: failed to clear interrupt status: %d\n",
1424 __func__, ret);
1425
1426 return IRQ_HANDLED;
1427 }
1428
1429 static struct attribute *tsl2772_ALS_device_attrs[] = {
1430 &dev_attr_in_illuminance0_target_input.attr,
1431 &dev_attr_in_illuminance0_calibrate.attr,
1432 &dev_attr_in_illuminance0_lux_table.attr,
1433 NULL
1434 };
1435
1436 static struct attribute *tsl2772_PRX_device_attrs[] = {
1437 &dev_attr_in_proximity0_calibrate.attr,
1438 NULL
1439 };
1440
1441 static struct attribute *tsl2772_ALSPRX_device_attrs[] = {
1442 &dev_attr_in_illuminance0_target_input.attr,
1443 &dev_attr_in_illuminance0_calibrate.attr,
1444 &dev_attr_in_illuminance0_lux_table.attr,
1445 NULL
1446 };
1447
1448 static struct attribute *tsl2772_PRX2_device_attrs[] = {
1449 &dev_attr_in_proximity0_calibrate.attr,
1450 NULL
1451 };
1452
1453 static struct attribute *tsl2772_ALSPRX2_device_attrs[] = {
1454 &dev_attr_in_illuminance0_target_input.attr,
1455 &dev_attr_in_illuminance0_calibrate.attr,
1456 &dev_attr_in_illuminance0_lux_table.attr,
1457 &dev_attr_in_proximity0_calibrate.attr,
1458 NULL
1459 };
1460
1461 static const struct attribute_group tsl2772_device_attr_group_tbl[] = {
1462 [ALS] = {
1463 .attrs = tsl2772_ALS_device_attrs,
1464 },
1465 [PRX] = {
1466 .attrs = tsl2772_PRX_device_attrs,
1467 },
1468 [ALSPRX] = {
1469 .attrs = tsl2772_ALSPRX_device_attrs,
1470 },
1471 [PRX2] = {
1472 .attrs = tsl2772_PRX2_device_attrs,
1473 },
1474 [ALSPRX2] = {
1475 .attrs = tsl2772_ALSPRX2_device_attrs,
1476 },
1477 };
1478
1479 #define TSL2772_DEVICE_INFO(type)[type] = \
1480 { \
1481 .attrs = &tsl2772_device_attr_group_tbl[type], \
1482 .read_raw = &tsl2772_read_raw, \
1483 .read_avail = &tsl2772_read_avail, \
1484 .write_raw = &tsl2772_write_raw, \
1485 .read_event_value = &tsl2772_read_event_value, \
1486 .write_event_value = &tsl2772_write_event_value, \
1487 .read_event_config = &tsl2772_read_interrupt_config, \
1488 .write_event_config = &tsl2772_write_interrupt_config, \
1489 }
1490
1491 static const struct iio_info tsl2772_device_info[] = {
1492 TSL2772_DEVICE_INFO(ALS),
1493 TSL2772_DEVICE_INFO(PRX),
1494 TSL2772_DEVICE_INFO(ALSPRX),
1495 TSL2772_DEVICE_INFO(PRX2),
1496 TSL2772_DEVICE_INFO(ALSPRX2),
1497 };
1498
1499 static const struct iio_event_spec tsl2772_events[] = {
1500 {
1501 .type = IIO_EV_TYPE_THRESH,
1502 .dir = IIO_EV_DIR_RISING,
1503 .mask_separate = BIT(IIO_EV_INFO_VALUE),
1504 }, {
1505 .type = IIO_EV_TYPE_THRESH,
1506 .dir = IIO_EV_DIR_FALLING,
1507 .mask_separate = BIT(IIO_EV_INFO_VALUE),
1508 }, {
1509 .type = IIO_EV_TYPE_THRESH,
1510 .dir = IIO_EV_DIR_EITHER,
1511 .mask_separate = BIT(IIO_EV_INFO_PERIOD) |
1512 BIT(IIO_EV_INFO_ENABLE),
1513 },
1514 };
1515
1516 static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = {
1517 [ALS] = {
1518 .channel_with_events = {
1519 {
1520 .type = IIO_LIGHT,
1521 .indexed = 1,
1522 .channel = 0,
1523 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1524 }, {
1525 .type = IIO_INTENSITY,
1526 .indexed = 1,
1527 .channel = 0,
1528 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1529 BIT(IIO_CHAN_INFO_INT_TIME) |
1530 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1531 BIT(IIO_CHAN_INFO_CALIBBIAS),
1532 .info_mask_separate_available =
1533 BIT(IIO_CHAN_INFO_INT_TIME) |
1534 BIT(IIO_CHAN_INFO_CALIBSCALE),
1535 .event_spec = tsl2772_events,
1536 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1537 }, {
1538 .type = IIO_INTENSITY,
1539 .indexed = 1,
1540 .channel = 1,
1541 },
1542 },
1543 .channel_without_events = {
1544 {
1545 .type = IIO_LIGHT,
1546 .indexed = 1,
1547 .channel = 0,
1548 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1549 }, {
1550 .type = IIO_INTENSITY,
1551 .indexed = 1,
1552 .channel = 0,
1553 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1554 BIT(IIO_CHAN_INFO_INT_TIME) |
1555 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1556 BIT(IIO_CHAN_INFO_CALIBBIAS),
1557 .info_mask_separate_available =
1558 BIT(IIO_CHAN_INFO_INT_TIME) |
1559 BIT(IIO_CHAN_INFO_CALIBSCALE),
1560 }, {
1561 .type = IIO_INTENSITY,
1562 .indexed = 1,
1563 .channel = 1,
1564 },
1565 },
1566 .chan_table_elements = 3,
1567 .info = &tsl2772_device_info[ALS],
1568 },
1569 [PRX] = {
1570 .channel_with_events = {
1571 {
1572 .type = IIO_PROXIMITY,
1573 .indexed = 1,
1574 .channel = 0,
1575 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1576 .event_spec = tsl2772_events,
1577 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1578 },
1579 },
1580 .channel_without_events = {
1581 {
1582 .type = IIO_PROXIMITY,
1583 .indexed = 1,
1584 .channel = 0,
1585 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1586 },
1587 },
1588 .chan_table_elements = 1,
1589 .info = &tsl2772_device_info[PRX],
1590 },
1591 [ALSPRX] = {
1592 .channel_with_events = {
1593 {
1594 .type = IIO_LIGHT,
1595 .indexed = 1,
1596 .channel = 0,
1597 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1598 }, {
1599 .type = IIO_INTENSITY,
1600 .indexed = 1,
1601 .channel = 0,
1602 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1603 BIT(IIO_CHAN_INFO_INT_TIME) |
1604 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1605 BIT(IIO_CHAN_INFO_CALIBBIAS),
1606 .info_mask_separate_available =
1607 BIT(IIO_CHAN_INFO_INT_TIME) |
1608 BIT(IIO_CHAN_INFO_CALIBSCALE),
1609 .event_spec = tsl2772_events,
1610 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1611 }, {
1612 .type = IIO_INTENSITY,
1613 .indexed = 1,
1614 .channel = 1,
1615 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1616 }, {
1617 .type = IIO_PROXIMITY,
1618 .indexed = 1,
1619 .channel = 0,
1620 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1621 .event_spec = tsl2772_events,
1622 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1623 },
1624 },
1625 .channel_without_events = {
1626 {
1627 .type = IIO_LIGHT,
1628 .indexed = 1,
1629 .channel = 0,
1630 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1631 }, {
1632 .type = IIO_INTENSITY,
1633 .indexed = 1,
1634 .channel = 0,
1635 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1636 BIT(IIO_CHAN_INFO_INT_TIME) |
1637 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1638 BIT(IIO_CHAN_INFO_CALIBBIAS),
1639 .info_mask_separate_available =
1640 BIT(IIO_CHAN_INFO_INT_TIME) |
1641 BIT(IIO_CHAN_INFO_CALIBSCALE),
1642 }, {
1643 .type = IIO_INTENSITY,
1644 .indexed = 1,
1645 .channel = 1,
1646 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1647 }, {
1648 .type = IIO_PROXIMITY,
1649 .indexed = 1,
1650 .channel = 0,
1651 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1652 },
1653 },
1654 .chan_table_elements = 4,
1655 .info = &tsl2772_device_info[ALSPRX],
1656 },
1657 [PRX2] = {
1658 .channel_with_events = {
1659 {
1660 .type = IIO_PROXIMITY,
1661 .indexed = 1,
1662 .channel = 0,
1663 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1664 BIT(IIO_CHAN_INFO_CALIBSCALE),
1665 .info_mask_separate_available =
1666 BIT(IIO_CHAN_INFO_CALIBSCALE),
1667 .event_spec = tsl2772_events,
1668 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1669 },
1670 },
1671 .channel_without_events = {
1672 {
1673 .type = IIO_PROXIMITY,
1674 .indexed = 1,
1675 .channel = 0,
1676 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1677 BIT(IIO_CHAN_INFO_CALIBSCALE),
1678 .info_mask_separate_available =
1679 BIT(IIO_CHAN_INFO_CALIBSCALE),
1680 },
1681 },
1682 .chan_table_elements = 1,
1683 .info = &tsl2772_device_info[PRX2],
1684 },
1685 [ALSPRX2] = {
1686 .channel_with_events = {
1687 {
1688 .type = IIO_LIGHT,
1689 .indexed = 1,
1690 .channel = 0,
1691 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1692 }, {
1693 .type = IIO_INTENSITY,
1694 .indexed = 1,
1695 .channel = 0,
1696 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1697 BIT(IIO_CHAN_INFO_INT_TIME) |
1698 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1699 BIT(IIO_CHAN_INFO_CALIBBIAS),
1700 .info_mask_separate_available =
1701 BIT(IIO_CHAN_INFO_INT_TIME) |
1702 BIT(IIO_CHAN_INFO_CALIBSCALE),
1703 .event_spec = tsl2772_events,
1704 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1705 }, {
1706 .type = IIO_INTENSITY,
1707 .indexed = 1,
1708 .channel = 1,
1709 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1710 }, {
1711 .type = IIO_PROXIMITY,
1712 .indexed = 1,
1713 .channel = 0,
1714 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1715 BIT(IIO_CHAN_INFO_CALIBSCALE),
1716 .info_mask_separate_available =
1717 BIT(IIO_CHAN_INFO_CALIBSCALE),
1718 .event_spec = tsl2772_events,
1719 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1720 },
1721 },
1722 .channel_without_events = {
1723 {
1724 .type = IIO_LIGHT,
1725 .indexed = 1,
1726 .channel = 0,
1727 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1728 }, {
1729 .type = IIO_INTENSITY,
1730 .indexed = 1,
1731 .channel = 0,
1732 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1733 BIT(IIO_CHAN_INFO_INT_TIME) |
1734 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1735 BIT(IIO_CHAN_INFO_CALIBBIAS),
1736 .info_mask_separate_available =
1737 BIT(IIO_CHAN_INFO_INT_TIME) |
1738 BIT(IIO_CHAN_INFO_CALIBSCALE),
1739 }, {
1740 .type = IIO_INTENSITY,
1741 .indexed = 1,
1742 .channel = 1,
1743 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1744 }, {
1745 .type = IIO_PROXIMITY,
1746 .indexed = 1,
1747 .channel = 0,
1748 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1749 BIT(IIO_CHAN_INFO_CALIBSCALE),
1750 .info_mask_separate_available =
1751 BIT(IIO_CHAN_INFO_CALIBSCALE),
1752 },
1753 },
1754 .chan_table_elements = 4,
1755 .info = &tsl2772_device_info[ALSPRX2],
1756 },
1757 };
1758
tsl2772_probe(struct i2c_client * clientp,const struct i2c_device_id * id)1759 static int tsl2772_probe(struct i2c_client *clientp,
1760 const struct i2c_device_id *id)
1761 {
1762 struct iio_dev *indio_dev;
1763 struct tsl2772_chip *chip;
1764 int ret;
1765
1766 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
1767 if (!indio_dev)
1768 return -ENOMEM;
1769
1770 chip = iio_priv(indio_dev);
1771 chip->client = clientp;
1772 i2c_set_clientdata(clientp, indio_dev);
1773
1774 chip->supplies[TSL2772_SUPPLY_VDD].supply = "vdd";
1775 chip->supplies[TSL2772_SUPPLY_VDDIO].supply = "vddio";
1776
1777 ret = devm_regulator_bulk_get(&clientp->dev,
1778 ARRAY_SIZE(chip->supplies),
1779 chip->supplies);
1780 if (ret < 0)
1781 return dev_err_probe(&clientp->dev, ret, "Failed to get regulators\n");
1782
1783 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies);
1784 if (ret < 0) {
1785 dev_err(&clientp->dev, "Failed to enable regulators: %d\n",
1786 ret);
1787 return ret;
1788 }
1789
1790 ret = devm_add_action_or_reset(&clientp->dev,
1791 tsl2772_disable_regulators_action,
1792 chip);
1793 if (ret < 0) {
1794 dev_err(&clientp->dev, "Failed to setup regulator cleanup action %d\n",
1795 ret);
1796 return ret;
1797 }
1798
1799 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME);
1800
1801 ret = i2c_smbus_read_byte_data(chip->client,
1802 TSL2772_CMD_REG | TSL2772_CHIPID);
1803 if (ret < 0)
1804 return ret;
1805
1806 if (tsl2772_device_id_verif(ret, id->driver_data) <= 0) {
1807 dev_info(&chip->client->dev,
1808 "%s: i2c device found does not match expected id\n",
1809 __func__);
1810 return -EINVAL;
1811 }
1812
1813 ret = i2c_smbus_write_byte(clientp, TSL2772_CMD_REG | TSL2772_CNTRL);
1814 if (ret < 0) {
1815 dev_err(&clientp->dev,
1816 "%s: Failed to write to CMD register: %d\n",
1817 __func__, ret);
1818 return ret;
1819 }
1820
1821 mutex_init(&chip->als_mutex);
1822 mutex_init(&chip->prox_mutex);
1823
1824 chip->tsl2772_chip_status = TSL2772_CHIP_UNKNOWN;
1825 chip->pdata = dev_get_platdata(&clientp->dev);
1826 chip->id = id->driver_data;
1827 chip->chip_info =
1828 &tsl2772_chip_info_tbl[device_channel_config[id->driver_data]];
1829
1830 indio_dev->info = chip->chip_info->info;
1831 indio_dev->modes = INDIO_DIRECT_MODE;
1832 indio_dev->name = chip->client->name;
1833 indio_dev->num_channels = chip->chip_info->chan_table_elements;
1834
1835 if (clientp->irq) {
1836 indio_dev->channels = chip->chip_info->channel_with_events;
1837
1838 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq,
1839 NULL,
1840 &tsl2772_event_handler,
1841 IRQF_TRIGGER_FALLING |
1842 IRQF_ONESHOT,
1843 "TSL2772_event",
1844 indio_dev);
1845 if (ret) {
1846 dev_err(&clientp->dev,
1847 "%s: irq request failed\n", __func__);
1848 return ret;
1849 }
1850 } else {
1851 indio_dev->channels = chip->chip_info->channel_without_events;
1852 }
1853
1854 tsl2772_defaults(chip);
1855 ret = tsl2772_chip_on(indio_dev);
1856 if (ret < 0)
1857 return ret;
1858
1859 ret = devm_add_action_or_reset(&clientp->dev,
1860 tsl2772_chip_off_action,
1861 indio_dev);
1862 if (ret < 0)
1863 return ret;
1864
1865 return devm_iio_device_register(&clientp->dev, indio_dev);
1866 }
1867
tsl2772_suspend(struct device * dev)1868 static int tsl2772_suspend(struct device *dev)
1869 {
1870 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1871 struct tsl2772_chip *chip = iio_priv(indio_dev);
1872 int ret;
1873
1874 ret = tsl2772_chip_off(indio_dev);
1875 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies);
1876
1877 return ret;
1878 }
1879
tsl2772_resume(struct device * dev)1880 static int tsl2772_resume(struct device *dev)
1881 {
1882 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1883 struct tsl2772_chip *chip = iio_priv(indio_dev);
1884 int ret;
1885
1886 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies);
1887 if (ret < 0)
1888 return ret;
1889
1890 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME);
1891
1892 return tsl2772_chip_on(indio_dev);
1893 }
1894
1895 static const struct i2c_device_id tsl2772_idtable[] = {
1896 { "tsl2571", tsl2571 },
1897 { "tsl2671", tsl2671 },
1898 { "tmd2671", tmd2671 },
1899 { "tsl2771", tsl2771 },
1900 { "tmd2771", tmd2771 },
1901 { "tsl2572", tsl2572 },
1902 { "tsl2672", tsl2672 },
1903 { "tmd2672", tmd2672 },
1904 { "tsl2772", tsl2772 },
1905 { "tmd2772", tmd2772 },
1906 { "apds9930", apds9930},
1907 {}
1908 };
1909
1910 MODULE_DEVICE_TABLE(i2c, tsl2772_idtable);
1911
1912 static const struct of_device_id tsl2772_of_match[] = {
1913 { .compatible = "amstaos,tsl2571" },
1914 { .compatible = "amstaos,tsl2671" },
1915 { .compatible = "amstaos,tmd2671" },
1916 { .compatible = "amstaos,tsl2771" },
1917 { .compatible = "amstaos,tmd2771" },
1918 { .compatible = "amstaos,tsl2572" },
1919 { .compatible = "amstaos,tsl2672" },
1920 { .compatible = "amstaos,tmd2672" },
1921 { .compatible = "amstaos,tsl2772" },
1922 { .compatible = "amstaos,tmd2772" },
1923 { .compatible = "avago,apds9930" },
1924 {}
1925 };
1926 MODULE_DEVICE_TABLE(of, tsl2772_of_match);
1927
1928 static const struct dev_pm_ops tsl2772_pm_ops = {
1929 .suspend = tsl2772_suspend,
1930 .resume = tsl2772_resume,
1931 };
1932
1933 static struct i2c_driver tsl2772_driver = {
1934 .driver = {
1935 .name = "tsl2772",
1936 .of_match_table = tsl2772_of_match,
1937 .pm = &tsl2772_pm_ops,
1938 },
1939 .id_table = tsl2772_idtable,
1940 .probe = tsl2772_probe,
1941 };
1942
1943 module_i2c_driver(tsl2772_driver);
1944
1945 MODULE_AUTHOR("J. August Brenner <Jon.Brenner@ams.com>");
1946 MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
1947 MODULE_DESCRIPTION("TAOS tsl2772 ambient and proximity light sensor driver");
1948 MODULE_LICENSE("GPL");
1949