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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / iio / light / tsl2772.c
blobbe37fcbd4654ea6a4fea5248686069d16b64425c
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
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
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
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 */
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 */
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
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
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
610 return 0;
611 }
612
613 static void tsl2772_parse_dt(struct tsl2772_chip *chip)
614 {
615 tsl2772_read_prox_led_current(chip);
616 tsl2772_read_prox_diodes(chip);
617 }
618
619 /**
620 * tsl2772_defaults() - Populates the device nominal operating parameters
621 * with those provided by a 'platform' data struct or
622 * with prefined defaults.
623 *
624 * @chip: pointer to device structure.
625 */
626 static void tsl2772_defaults(struct tsl2772_chip *chip)
627 {
628 /* If Operational settings defined elsewhere.. */
629 if (chip->pdata && chip->pdata->platform_default_settings)
630 memcpy(&chip->settings, chip->pdata->platform_default_settings,
631 sizeof(tsl2772_default_settings));
632 else
633 memcpy(&chip->settings, &tsl2772_default_settings,
634 sizeof(tsl2772_default_settings));
635
636 /* Load up the proper lux table. */
637 if (chip->pdata && chip->pdata->platform_lux_table[0].ch0 != 0)
638 memcpy(chip->tsl2772_device_lux,
639 chip->pdata->platform_lux_table,
640 sizeof(chip->pdata->platform_lux_table));
641 else
642 memcpy(chip->tsl2772_device_lux,
643 tsl2772_default_lux_table_group[chip->id],
644 TSL2772_DEFAULT_TABLE_BYTES);
645
646 tsl2772_parse_dt(chip);
647 }
648
649 /**
650 * tsl2772_als_calibrate() - Obtain single reading and calculate
651 * the als_gain_trim.
652 *
653 * @indio_dev: pointer to IIO device
654 */
655 static int tsl2772_als_calibrate(struct iio_dev *indio_dev)
656 {
657 struct tsl2772_chip *chip = iio_priv(indio_dev);
658 int ret, lux_val;
659
660 ret = i2c_smbus_read_byte_data(chip->client,
661 TSL2772_CMD_REG | TSL2772_CNTRL);
662 if (ret < 0) {
663 dev_err(&chip->client->dev,
664 "%s: failed to read from the CNTRL register\n",
665 __func__);
666 return ret;
667 }
668
669 if ((ret & (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON))
670 != (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) {
671 dev_err(&chip->client->dev,
672 "%s: Device is not powered on and/or ADC is not enabled\n",
673 __func__);
674 return -EINVAL;
675 } else if ((ret & TSL2772_STA_ADC_VALID) != TSL2772_STA_ADC_VALID) {
676 dev_err(&chip->client->dev,
677 "%s: The two ADC channels have not completed an integration cycle\n",
678 __func__);
679 return -ENODATA;
680 }
681
682 lux_val = tsl2772_get_lux(indio_dev);
683 if (lux_val < 0) {
684 dev_err(&chip->client->dev,
685 "%s: failed to get lux\n", __func__);
686 return lux_val;
687 }
688 if (lux_val == 0)
689 return -ERANGE;
690
691 ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) /
692 lux_val;
693 if (ret < TSL2772_ALS_GAIN_TRIM_MIN || ret > TSL2772_ALS_GAIN_TRIM_MAX)
694 return -ERANGE;
695
696 chip->settings.als_gain_trim = ret;
697
698 return ret;
699 }
700
701 static void tsl2772_disable_regulators_action(void *_data)
702 {
703 struct tsl2772_chip *chip = _data;
704
705 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies);
706 }
707
708 static int tsl2772_chip_on(struct iio_dev *indio_dev)
709 {
710 struct tsl2772_chip *chip = iio_priv(indio_dev);
711 int ret, i, als_count, als_time_us;
712 u8 *dev_reg, reg_val;
713
714 /* Non calculated parameters */
715 chip->tsl2772_config[TSL2772_ALS_TIME] = chip->settings.als_time;
716 chip->tsl2772_config[TSL2772_PRX_TIME] = chip->settings.prox_time;
717 chip->tsl2772_config[TSL2772_WAIT_TIME] = chip->settings.wait_time;
718 chip->tsl2772_config[TSL2772_ALS_PRX_CONFIG] =
719 chip->settings.als_prox_config;
720
721 chip->tsl2772_config[TSL2772_ALS_MINTHRESHLO] =
722 (chip->settings.als_thresh_low) & 0xFF;
723 chip->tsl2772_config[TSL2772_ALS_MINTHRESHHI] =
724 (chip->settings.als_thresh_low >> 8) & 0xFF;
725 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHLO] =
726 (chip->settings.als_thresh_high) & 0xFF;
727 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHHI] =
728 (chip->settings.als_thresh_high >> 8) & 0xFF;
729 chip->tsl2772_config[TSL2772_PERSISTENCE] =
730 (chip->settings.prox_persistence & 0xFF) << 4 |
731 (chip->settings.als_persistence & 0xFF);
732
733 chip->tsl2772_config[TSL2772_PRX_COUNT] =
734 chip->settings.prox_pulse_count;
735 chip->tsl2772_config[TSL2772_PRX_MINTHRESHLO] =
736 (chip->settings.prox_thres_low) & 0xFF;
737 chip->tsl2772_config[TSL2772_PRX_MINTHRESHHI] =
738 (chip->settings.prox_thres_low >> 8) & 0xFF;
739 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHLO] =
740 (chip->settings.prox_thres_high) & 0xFF;
741 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHHI] =
742 (chip->settings.prox_thres_high >> 8) & 0xFF;
743
744 /* and make sure we're not already on */
745 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) {
746 /* if forcing a register update - turn off, then on */
747 dev_info(&chip->client->dev, "device is already enabled\n");
748 return -EINVAL;
749 }
750
751 /* Set the gain based on tsl2772_settings struct */
752 chip->tsl2772_config[TSL2772_GAIN] =
753 (chip->settings.als_gain & 0xFF) |
754 ((chip->settings.prox_gain & 0xFF) << 2) |
755 (chip->settings.prox_diode << 4) |
756 (chip->settings.prox_power << 6);
757
758 /* set chip time scaling and saturation */
759 als_count = 256 - chip->settings.als_time;
760 als_time_us = als_count * tsl2772_int_time_avail[chip->id][3];
761 chip->als_saturation = als_count * 768; /* 75% of full scale */
762 chip->als_gain_time_scale = als_time_us *
763 tsl2772_als_gain[chip->settings.als_gain];
764
765 /*
766 * TSL2772 Specific power-on / adc enable sequence
767 * Power on the device 1st.
768 */
769 ret = tsl2772_write_control_reg(chip, TSL2772_CNTL_PWR_ON);
770 if (ret < 0)
771 return ret;
772
773 /*
774 * Use the following shadow copy for our delay before enabling ADC.
775 * Write all the registers.
776 */
777 for (i = 0, dev_reg = chip->tsl2772_config;
778 i < TSL2772_MAX_CONFIG_REG; i++) {
779 int reg = TSL2772_CMD_REG + i;
780
781 ret = i2c_smbus_write_byte_data(chip->client, reg,
782 *dev_reg++);
783 if (ret < 0) {
784 dev_err(&chip->client->dev,
785 "%s: failed to write to register %x: %d\n",
786 __func__, reg, ret);
787 return ret;
788 }
789 }
790
791 /* Power-on settling time */
792 usleep_range(3000, 3500);
793
794 reg_val = TSL2772_CNTL_PWR_ON | TSL2772_CNTL_ADC_ENBL |
795 TSL2772_CNTL_PROX_DET_ENBL;
796 if (chip->settings.als_interrupt_en)
797 reg_val |= TSL2772_CNTL_ALS_INT_ENBL;
798 if (chip->settings.prox_interrupt_en)
799 reg_val |= TSL2772_CNTL_PROX_INT_ENBL;
800
801 ret = tsl2772_write_control_reg(chip, reg_val);
802 if (ret < 0)
803 return ret;
804
805 ret = i2c_smbus_write_byte(chip->client,
806 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN |
807 TSL2772_CMD_PROXALS_INT_CLR);
808 if (ret < 0) {
809 dev_err(&chip->client->dev,
810 "%s: failed to clear interrupt status: %d\n",
811 __func__, ret);
812 return ret;
813 }
814
815 chip->tsl2772_chip_status = TSL2772_CHIP_WORKING;
816
817 return ret;
818 }
819
820 static int tsl2772_chip_off(struct iio_dev *indio_dev)
821 {
822 struct tsl2772_chip *chip = iio_priv(indio_dev);
823
824 /* turn device off */
825 chip->tsl2772_chip_status = TSL2772_CHIP_SUSPENDED;
826 return tsl2772_write_control_reg(chip, 0x00);
827 }
828
829 static void tsl2772_chip_off_action(void *data)
830 {
831 struct iio_dev *indio_dev = data;
832
833 tsl2772_chip_off(indio_dev);
834 }
835
836 /**
837 * tsl2772_invoke_change - power cycle the device to implement the user
838 * parameters
839 * @indio_dev: pointer to IIO device
840 *
841 * Obtain and lock both ALS and PROX resources, determine and save device state
842 * (On/Off), cycle device to implement updated parameter, put device back into
843 * proper state, and unlock resource.
844 */
845 static int tsl2772_invoke_change(struct iio_dev *indio_dev)
846 {
847 struct tsl2772_chip *chip = iio_priv(indio_dev);
848 int device_status = chip->tsl2772_chip_status;
849 int ret;
850
851 mutex_lock(&chip->als_mutex);
852 mutex_lock(&chip->prox_mutex);
853
854 if (device_status == TSL2772_CHIP_WORKING) {
855 ret = tsl2772_chip_off(indio_dev);
856 if (ret < 0)
857 goto unlock;
858 }
859
860 ret = tsl2772_chip_on(indio_dev);
861
862 unlock:
863 mutex_unlock(&chip->prox_mutex);
864 mutex_unlock(&chip->als_mutex);
865
866 return ret;
867 }
868
869 static int tsl2772_prox_cal(struct iio_dev *indio_dev)
870 {
871 struct tsl2772_chip *chip = iio_priv(indio_dev);
872 int prox_history[MAX_SAMPLES_CAL + 1];
873 int i, ret, mean, max, sample_sum;
874
875 if (chip->settings.prox_max_samples_cal < 1 ||
876 chip->settings.prox_max_samples_cal > MAX_SAMPLES_CAL)
877 return -EINVAL;
878
879 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) {
880 usleep_range(15000, 17500);
881 ret = tsl2772_get_prox(indio_dev);
882 if (ret < 0)
883 return ret;
884
885 prox_history[i] = chip->prox_data;
886 }
887
888 sample_sum = 0;
889 max = INT_MIN;
890 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) {
891 sample_sum += prox_history[i];
892 max = max(max, prox_history[i]);
893 }
894 mean = sample_sum / chip->settings.prox_max_samples_cal;
895
896 chip->settings.prox_thres_high = (max << 1) - mean;
897
898 return tsl2772_invoke_change(indio_dev);
899 }
900
901 static int tsl2772_read_avail(struct iio_dev *indio_dev,
902 struct iio_chan_spec const *chan,
903 const int **vals, int *type, int *length,
904 long mask)
905 {
906 struct tsl2772_chip *chip = iio_priv(indio_dev);
907
908 switch (mask) {
909 case IIO_CHAN_INFO_CALIBSCALE:
910 if (chan->type == IIO_INTENSITY) {
911 *length = ARRAY_SIZE(tsl2772_int_calibscale_avail);
912 *vals = tsl2772_int_calibscale_avail;
913 } else {
914 *length = ARRAY_SIZE(tsl2772_prox_calibscale_avail);
915 *vals = tsl2772_prox_calibscale_avail;
916 }
917 *type = IIO_VAL_INT;
918 return IIO_AVAIL_LIST;
919 case IIO_CHAN_INFO_INT_TIME:
920 *length = ARRAY_SIZE(tsl2772_int_time_avail[chip->id]);
921 *vals = tsl2772_int_time_avail[chip->id];
922 *type = IIO_VAL_INT_PLUS_MICRO;
923 return IIO_AVAIL_RANGE;
924 }
925
926 return -EINVAL;
927 }
928
929 static ssize_t in_illuminance0_target_input_show(struct device *dev,
930 struct device_attribute *attr,
931 char *buf)
932 {
933 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev));
934
935 return snprintf(buf, PAGE_SIZE, "%d\n", chip->settings.als_cal_target);
936 }
937
938 static ssize_t in_illuminance0_target_input_store(struct device *dev,
939 struct device_attribute *attr,
940 const char *buf, size_t len)
941 {
942 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
943 struct tsl2772_chip *chip = iio_priv(indio_dev);
944 u16 value;
945 int ret;
946
947 if (kstrtou16(buf, 0, &value))
948 return -EINVAL;
949
950 chip->settings.als_cal_target = value;
951 ret = tsl2772_invoke_change(indio_dev);
952 if (ret < 0)
953 return ret;
954
955 return len;
956 }
957
958 static ssize_t in_illuminance0_calibrate_store(struct device *dev,
959 struct device_attribute *attr,
960 const char *buf, size_t len)
961 {
962 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
963 bool value;
964 int ret;
965
966 if (kstrtobool(buf, &value) || !value)
967 return -EINVAL;
968
969 ret = tsl2772_als_calibrate(indio_dev);
970 if (ret < 0)
971 return ret;
972
973 ret = tsl2772_invoke_change(indio_dev);
974 if (ret < 0)
975 return ret;
976
977 return len;
978 }
979
980 static ssize_t in_illuminance0_lux_table_show(struct device *dev,
981 struct device_attribute *attr,
982 char *buf)
983 {
984 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev));
985 int i = 0;
986 int offset = 0;
987
988 while (i < TSL2772_MAX_LUX_TABLE_SIZE) {
989 offset += snprintf(buf + offset, PAGE_SIZE, "%u,%u,",
990 chip->tsl2772_device_lux[i].ch0,
991 chip->tsl2772_device_lux[i].ch1);
992 if (chip->tsl2772_device_lux[i].ch0 == 0) {
993 /*
994 * We just printed the first "0" entry.
995 * Now get rid of the extra "," and break.
996 */
997 offset--;
998 break;
999 }
1000 i++;
1001 }
1002
1003 offset += snprintf(buf + offset, PAGE_SIZE, "\n");
1004 return offset;
1005 }
1006
1007 static ssize_t in_illuminance0_lux_table_store(struct device *dev,
1008 struct device_attribute *attr,
1009 const char *buf, size_t len)
1010 {
1011 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1012 struct tsl2772_chip *chip = iio_priv(indio_dev);
1013 int value[ARRAY_SIZE(chip->tsl2772_device_lux) * 2 + 1];
1014 int n, ret;
1015
1016 get_options(buf, ARRAY_SIZE(value), value);
1017
1018 /*
1019 * We now have an array of ints starting at value[1], and
1020 * enumerated by value[0].
1021 * We expect each group of two ints to be one table entry,
1022 * and the last table entry is all 0.
1023 */
1024 n = value[0];
1025 if ((n % 2) || n < 4 ||
1026 n > ((ARRAY_SIZE(chip->tsl2772_device_lux) - 1) * 2))
1027 return -EINVAL;
1028
1029 if ((value[(n - 1)] | value[n]) != 0)
1030 return -EINVAL;
1031
1032 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) {
1033 ret = tsl2772_chip_off(indio_dev);
1034 if (ret < 0)
1035 return ret;
1036 }
1037
1038 /* Zero out the table */
1039 memset(chip->tsl2772_device_lux, 0, sizeof(chip->tsl2772_device_lux));
1040 memcpy(chip->tsl2772_device_lux, &value[1], (value[0] * 4));
1041
1042 ret = tsl2772_invoke_change(indio_dev);
1043 if (ret < 0)
1044 return ret;
1045
1046 return len;
1047 }
1048
1049 static ssize_t in_proximity0_calibrate_store(struct device *dev,
1050 struct device_attribute *attr,
1051 const char *buf, size_t len)
1052 {
1053 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1054 bool value;
1055 int ret;
1056
1057 if (kstrtobool(buf, &value) || !value)
1058 return -EINVAL;
1059
1060 ret = tsl2772_prox_cal(indio_dev);
1061 if (ret < 0)
1062 return ret;
1063
1064 ret = tsl2772_invoke_change(indio_dev);
1065 if (ret < 0)
1066 return ret;
1067
1068 return len;
1069 }
1070
1071 static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev,
1072 const struct iio_chan_spec *chan,
1073 enum iio_event_type type,
1074 enum iio_event_direction dir)
1075 {
1076 struct tsl2772_chip *chip = iio_priv(indio_dev);
1077
1078 if (chan->type == IIO_INTENSITY)
1079 return chip->settings.als_interrupt_en;
1080 else
1081 return chip->settings.prox_interrupt_en;
1082 }
1083
1084 static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev,
1085 const struct iio_chan_spec *chan,
1086 enum iio_event_type type,
1087 enum iio_event_direction dir,
1088 int val)
1089 {
1090 struct tsl2772_chip *chip = iio_priv(indio_dev);
1091
1092 if (chan->type == IIO_INTENSITY)
1093 chip->settings.als_interrupt_en = val ? true : false;
1094 else
1095 chip->settings.prox_interrupt_en = val ? true : false;
1096
1097 return tsl2772_invoke_change(indio_dev);
1098 }
1099
1100 static int tsl2772_write_event_value(struct iio_dev *indio_dev,
1101 const struct iio_chan_spec *chan,
1102 enum iio_event_type type,
1103 enum iio_event_direction dir,
1104 enum iio_event_info info,
1105 int val, int val2)
1106 {
1107 struct tsl2772_chip *chip = iio_priv(indio_dev);
1108 int ret = -EINVAL, count, persistence;
1109 u8 time;
1110
1111 switch (info) {
1112 case IIO_EV_INFO_VALUE:
1113 if (chan->type == IIO_INTENSITY) {
1114 switch (dir) {
1115 case IIO_EV_DIR_RISING:
1116 chip->settings.als_thresh_high = val;
1117 ret = 0;
1118 break;
1119 case IIO_EV_DIR_FALLING:
1120 chip->settings.als_thresh_low = val;
1121 ret = 0;
1122 break;
1123 default:
1124 break;
1125 }
1126 } else {
1127 switch (dir) {
1128 case IIO_EV_DIR_RISING:
1129 chip->settings.prox_thres_high = val;
1130 ret = 0;
1131 break;
1132 case IIO_EV_DIR_FALLING:
1133 chip->settings.prox_thres_low = val;
1134 ret = 0;
1135 break;
1136 default:
1137 break;
1138 }
1139 }
1140 break;
1141 case IIO_EV_INFO_PERIOD:
1142 if (chan->type == IIO_INTENSITY)
1143 time = chip->settings.als_time;
1144 else
1145 time = chip->settings.prox_time;
1146
1147 count = 256 - time;
1148 persistence = ((val * 1000000) + val2) /
1149 (count * tsl2772_int_time_avail[chip->id][3]);
1150
1151 if (chan->type == IIO_INTENSITY) {
1152 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */
1153 if (persistence > 3)
1154 persistence = (persistence / 5) + 3;
1155
1156 chip->settings.als_persistence = persistence;
1157 } else {
1158 chip->settings.prox_persistence = persistence;
1159 }
1160
1161 ret = 0;
1162 break;
1163 default:
1164 break;
1165 }
1166
1167 if (ret < 0)
1168 return ret;
1169
1170 return tsl2772_invoke_change(indio_dev);
1171 }
1172
1173 static int tsl2772_read_event_value(struct iio_dev *indio_dev,
1174 const struct iio_chan_spec *chan,
1175 enum iio_event_type type,
1176 enum iio_event_direction dir,
1177 enum iio_event_info info,
1178 int *val, int *val2)
1179 {
1180 struct tsl2772_chip *chip = iio_priv(indio_dev);
1181 int filter_delay, persistence;
1182 u8 time;
1183
1184 switch (info) {
1185 case IIO_EV_INFO_VALUE:
1186 if (chan->type == IIO_INTENSITY) {
1187 switch (dir) {
1188 case IIO_EV_DIR_RISING:
1189 *val = chip->settings.als_thresh_high;
1190 return IIO_VAL_INT;
1191 case IIO_EV_DIR_FALLING:
1192 *val = chip->settings.als_thresh_low;
1193 return IIO_VAL_INT;
1194 default:
1195 return -EINVAL;
1196 }
1197 } else {
1198 switch (dir) {
1199 case IIO_EV_DIR_RISING:
1200 *val = chip->settings.prox_thres_high;
1201 return IIO_VAL_INT;
1202 case IIO_EV_DIR_FALLING:
1203 *val = chip->settings.prox_thres_low;
1204 return IIO_VAL_INT;
1205 default:
1206 return -EINVAL;
1207 }
1208 }
1209 break;
1210 case IIO_EV_INFO_PERIOD:
1211 if (chan->type == IIO_INTENSITY) {
1212 time = chip->settings.als_time;
1213 persistence = chip->settings.als_persistence;
1214
1215 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */
1216 if (persistence > 3)
1217 persistence = (persistence - 3) * 5;
1218 } else {
1219 time = chip->settings.prox_time;
1220 persistence = chip->settings.prox_persistence;
1221 }
1222
1223 filter_delay = persistence * (256 - time) *
1224 tsl2772_int_time_avail[chip->id][3];
1225
1226 *val = filter_delay / 1000000;
1227 *val2 = filter_delay % 1000000;
1228 return IIO_VAL_INT_PLUS_MICRO;
1229 default:
1230 return -EINVAL;
1231 }
1232 }
1233
1234 static int tsl2772_read_raw(struct iio_dev *indio_dev,
1235 struct iio_chan_spec const *chan,
1236 int *val,
1237 int *val2,
1238 long mask)
1239 {
1240 struct tsl2772_chip *chip = iio_priv(indio_dev);
1241
1242 switch (mask) {
1243 case IIO_CHAN_INFO_PROCESSED:
1244 switch (chan->type) {
1245 case IIO_LIGHT:
1246 tsl2772_get_lux(indio_dev);
1247 *val = chip->als_cur_info.lux;
1248 return IIO_VAL_INT;
1249 default:
1250 return -EINVAL;
1251 }
1252 case IIO_CHAN_INFO_RAW:
1253 switch (chan->type) {
1254 case IIO_INTENSITY:
1255 tsl2772_get_lux(indio_dev);
1256 if (chan->channel == 0)
1257 *val = chip->als_cur_info.als_ch0;
1258 else
1259 *val = chip->als_cur_info.als_ch1;
1260 return IIO_VAL_INT;
1261 case IIO_PROXIMITY:
1262 tsl2772_get_prox(indio_dev);
1263 *val = chip->prox_data;
1264 return IIO_VAL_INT;
1265 default:
1266 return -EINVAL;
1267 }
1268 break;
1269 case IIO_CHAN_INFO_CALIBSCALE:
1270 if (chan->type == IIO_LIGHT)
1271 *val = tsl2772_als_gain[chip->settings.als_gain];
1272 else
1273 *val = tsl2772_prox_gain[chip->settings.prox_gain];
1274 return IIO_VAL_INT;
1275 case IIO_CHAN_INFO_CALIBBIAS:
1276 *val = chip->settings.als_gain_trim;
1277 return IIO_VAL_INT;
1278 case IIO_CHAN_INFO_INT_TIME:
1279 *val = 0;
1280 *val2 = (256 - chip->settings.als_time) *
1281 tsl2772_int_time_avail[chip->id][3];
1282 return IIO_VAL_INT_PLUS_MICRO;
1283 default:
1284 return -EINVAL;
1285 }
1286 }
1287
1288 static int tsl2772_write_raw(struct iio_dev *indio_dev,
1289 struct iio_chan_spec const *chan,
1290 int val,
1291 int val2,
1292 long mask)
1293 {
1294 struct tsl2772_chip *chip = iio_priv(indio_dev);
1295
1296 switch (mask) {
1297 case IIO_CHAN_INFO_CALIBSCALE:
1298 if (chan->type == IIO_INTENSITY) {
1299 switch (val) {
1300 case 1:
1301 chip->settings.als_gain = 0;
1302 break;
1303 case 8:
1304 chip->settings.als_gain = 1;
1305 break;
1306 case 16:
1307 chip->settings.als_gain = 2;
1308 break;
1309 case 120:
1310 chip->settings.als_gain = 3;
1311 break;
1312 default:
1313 return -EINVAL;
1314 }
1315 } else {
1316 switch (val) {
1317 case 1:
1318 chip->settings.prox_gain = 0;
1319 break;
1320 case 2:
1321 chip->settings.prox_gain = 1;
1322 break;
1323 case 4:
1324 chip->settings.prox_gain = 2;
1325 break;
1326 case 8:
1327 chip->settings.prox_gain = 3;
1328 break;
1329 default:
1330 return -EINVAL;
1331 }
1332 }
1333 break;
1334 case IIO_CHAN_INFO_CALIBBIAS:
1335 if (val < TSL2772_ALS_GAIN_TRIM_MIN ||
1336 val > TSL2772_ALS_GAIN_TRIM_MAX)
1337 return -EINVAL;
1338
1339 chip->settings.als_gain_trim = val;
1340 break;
1341 case IIO_CHAN_INFO_INT_TIME:
1342 if (val != 0 || val2 < tsl2772_int_time_avail[chip->id][1] ||
1343 val2 > tsl2772_int_time_avail[chip->id][5])
1344 return -EINVAL;
1345
1346 chip->settings.als_time = 256 -
1347 (val2 / tsl2772_int_time_avail[chip->id][3]);
1348 break;
1349 default:
1350 return -EINVAL;
1351 }
1352
1353 return tsl2772_invoke_change(indio_dev);
1354 }
1355
1356 static DEVICE_ATTR_RW(in_illuminance0_target_input);
1357
1358 static DEVICE_ATTR_WO(in_illuminance0_calibrate);
1359
1360 static DEVICE_ATTR_WO(in_proximity0_calibrate);
1361
1362 static DEVICE_ATTR_RW(in_illuminance0_lux_table);
1363
1364 /* Use the default register values to identify the Taos device */
1365 static int tsl2772_device_id_verif(int id, int target)
1366 {
1367 switch (target) {
1368 case tsl2571:
1369 case tsl2671:
1370 case tsl2771:
1371 return (id & 0xf0) == TRITON_ID;
1372 case tmd2671:
1373 case tmd2771:
1374 return (id & 0xf0) == HALIBUT_ID;
1375 case tsl2572:
1376 case tsl2672:
1377 case tmd2672:
1378 case tsl2772:
1379 case tmd2772:
1380 case apds9930:
1381 return (id & 0xf0) == SWORDFISH_ID;
1382 }
1383
1384 return -EINVAL;
1385 }
1386
1387 static irqreturn_t tsl2772_event_handler(int irq, void *private)
1388 {
1389 struct iio_dev *indio_dev = private;
1390 struct tsl2772_chip *chip = iio_priv(indio_dev);
1391 s64 timestamp = iio_get_time_ns(indio_dev);
1392 int ret;
1393
1394 ret = tsl2772_read_status(chip);
1395 if (ret < 0)
1396 return IRQ_HANDLED;
1397
1398 /* What type of interrupt do we need to process */
1399 if (ret & TSL2772_STA_PRX_INTR) {
1400 iio_push_event(indio_dev,
1401 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
1402 0,
1403 IIO_EV_TYPE_THRESH,
1404 IIO_EV_DIR_EITHER),
1405 timestamp);
1406 }
1407
1408 if (ret & TSL2772_STA_ALS_INTR) {
1409 iio_push_event(indio_dev,
1410 IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
1411 0,
1412 IIO_EV_TYPE_THRESH,
1413 IIO_EV_DIR_EITHER),
1414 timestamp);
1415 }
1416
1417 ret = i2c_smbus_write_byte(chip->client,
1418 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN |
1419 TSL2772_CMD_PROXALS_INT_CLR);
1420 if (ret < 0)
1421 dev_err(&chip->client->dev,
1422 "%s: failed to clear interrupt status: %d\n",
1423 __func__, ret);
1424
1425 return IRQ_HANDLED;
1426 }
1427
1428 static struct attribute *tsl2772_ALS_device_attrs[] = {
1429 &dev_attr_in_illuminance0_target_input.attr,
1430 &dev_attr_in_illuminance0_calibrate.attr,
1431 &dev_attr_in_illuminance0_lux_table.attr,
1432 NULL
1433 };
1434
1435 static struct attribute *tsl2772_PRX_device_attrs[] = {
1436 &dev_attr_in_proximity0_calibrate.attr,
1437 NULL
1438 };
1439
1440 static struct attribute *tsl2772_ALSPRX_device_attrs[] = {
1441 &dev_attr_in_illuminance0_target_input.attr,
1442 &dev_attr_in_illuminance0_calibrate.attr,
1443 &dev_attr_in_illuminance0_lux_table.attr,
1444 NULL
1445 };
1446
1447 static struct attribute *tsl2772_PRX2_device_attrs[] = {
1448 &dev_attr_in_proximity0_calibrate.attr,
1449 NULL
1450 };
1451
1452 static struct attribute *tsl2772_ALSPRX2_device_attrs[] = {
1453 &dev_attr_in_illuminance0_target_input.attr,
1454 &dev_attr_in_illuminance0_calibrate.attr,
1455 &dev_attr_in_illuminance0_lux_table.attr,
1456 &dev_attr_in_proximity0_calibrate.attr,
1457 NULL
1458 };
1459
1460 static const struct attribute_group tsl2772_device_attr_group_tbl[] = {
1461 [ALS] = {
1462 .attrs = tsl2772_ALS_device_attrs,
1463 },
1464 [PRX] = {
1465 .attrs = tsl2772_PRX_device_attrs,
1466 },
1467 [ALSPRX] = {
1468 .attrs = tsl2772_ALSPRX_device_attrs,
1469 },
1470 [PRX2] = {
1471 .attrs = tsl2772_PRX2_device_attrs,
1472 },
1473 [ALSPRX2] = {
1474 .attrs = tsl2772_ALSPRX2_device_attrs,
1475 },
1476 };
1477
1478 #define TSL2772_DEVICE_INFO(type)[type] = \
1479 { \
1480 .attrs = &tsl2772_device_attr_group_tbl[type], \
1481 .read_raw = &tsl2772_read_raw, \
1482 .read_avail = &tsl2772_read_avail, \
1483 .write_raw = &tsl2772_write_raw, \
1484 .read_event_value = &tsl2772_read_event_value, \
1485 .write_event_value = &tsl2772_write_event_value, \
1486 .read_event_config = &tsl2772_read_interrupt_config, \
1487 .write_event_config = &tsl2772_write_interrupt_config, \
1488 }
1489
1490 static const struct iio_info tsl2772_device_info[] = {
1491 TSL2772_DEVICE_INFO(ALS),
1492 TSL2772_DEVICE_INFO(PRX),
1493 TSL2772_DEVICE_INFO(ALSPRX),
1494 TSL2772_DEVICE_INFO(PRX2),
1495 TSL2772_DEVICE_INFO(ALSPRX2),
1496 };
1497
1498 static const struct iio_event_spec tsl2772_events[] = {
1499 {
1500 .type = IIO_EV_TYPE_THRESH,
1501 .dir = IIO_EV_DIR_RISING,
1502 .mask_separate = BIT(IIO_EV_INFO_VALUE),
1503 }, {
1504 .type = IIO_EV_TYPE_THRESH,
1505 .dir = IIO_EV_DIR_FALLING,
1506 .mask_separate = BIT(IIO_EV_INFO_VALUE),
1507 }, {
1508 .type = IIO_EV_TYPE_THRESH,
1509 .dir = IIO_EV_DIR_EITHER,
1510 .mask_separate = BIT(IIO_EV_INFO_PERIOD) |
1511 BIT(IIO_EV_INFO_ENABLE),
1512 },
1513 };
1514
1515 static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = {
1516 [ALS] = {
1517 .channel_with_events = {
1518 {
1519 .type = IIO_LIGHT,
1520 .indexed = 1,
1521 .channel = 0,
1522 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1523 }, {
1524 .type = IIO_INTENSITY,
1525 .indexed = 1,
1526 .channel = 0,
1527 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1528 BIT(IIO_CHAN_INFO_INT_TIME) |
1529 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1530 BIT(IIO_CHAN_INFO_CALIBBIAS),
1531 .info_mask_separate_available =
1532 BIT(IIO_CHAN_INFO_INT_TIME) |
1533 BIT(IIO_CHAN_INFO_CALIBSCALE),
1534 .event_spec = tsl2772_events,
1535 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1536 }, {
1537 .type = IIO_INTENSITY,
1538 .indexed = 1,
1539 .channel = 1,
1540 },
1541 },
1542 .channel_without_events = {
1543 {
1544 .type = IIO_LIGHT,
1545 .indexed = 1,
1546 .channel = 0,
1547 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1548 }, {
1549 .type = IIO_INTENSITY,
1550 .indexed = 1,
1551 .channel = 0,
1552 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1553 BIT(IIO_CHAN_INFO_INT_TIME) |
1554 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1555 BIT(IIO_CHAN_INFO_CALIBBIAS),
1556 .info_mask_separate_available =
1557 BIT(IIO_CHAN_INFO_INT_TIME) |
1558 BIT(IIO_CHAN_INFO_CALIBSCALE),
1559 }, {
1560 .type = IIO_INTENSITY,
1561 .indexed = 1,
1562 .channel = 1,
1563 },
1564 },
1565 .chan_table_elements = 3,
1566 .info = &tsl2772_device_info[ALS],
1567 },
1568 [PRX] = {
1569 .channel_with_events = {
1570 {
1571 .type = IIO_PROXIMITY,
1572 .indexed = 1,
1573 .channel = 0,
1574 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1575 .event_spec = tsl2772_events,
1576 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1577 },
1578 },
1579 .channel_without_events = {
1580 {
1581 .type = IIO_PROXIMITY,
1582 .indexed = 1,
1583 .channel = 0,
1584 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1585 },
1586 },
1587 .chan_table_elements = 1,
1588 .info = &tsl2772_device_info[PRX],
1589 },
1590 [ALSPRX] = {
1591 .channel_with_events = {
1592 {
1593 .type = IIO_LIGHT,
1594 .indexed = 1,
1595 .channel = 0,
1596 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1597 }, {
1598 .type = IIO_INTENSITY,
1599 .indexed = 1,
1600 .channel = 0,
1601 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1602 BIT(IIO_CHAN_INFO_INT_TIME) |
1603 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1604 BIT(IIO_CHAN_INFO_CALIBBIAS),
1605 .info_mask_separate_available =
1606 BIT(IIO_CHAN_INFO_INT_TIME) |
1607 BIT(IIO_CHAN_INFO_CALIBSCALE),
1608 .event_spec = tsl2772_events,
1609 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1610 }, {
1611 .type = IIO_INTENSITY,
1612 .indexed = 1,
1613 .channel = 1,
1614 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1615 }, {
1616 .type = IIO_PROXIMITY,
1617 .indexed = 1,
1618 .channel = 0,
1619 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1620 .event_spec = tsl2772_events,
1621 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1622 },
1623 },
1624 .channel_without_events = {
1625 {
1626 .type = IIO_LIGHT,
1627 .indexed = 1,
1628 .channel = 0,
1629 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1630 }, {
1631 .type = IIO_INTENSITY,
1632 .indexed = 1,
1633 .channel = 0,
1634 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1635 BIT(IIO_CHAN_INFO_INT_TIME) |
1636 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1637 BIT(IIO_CHAN_INFO_CALIBBIAS),
1638 .info_mask_separate_available =
1639 BIT(IIO_CHAN_INFO_INT_TIME) |
1640 BIT(IIO_CHAN_INFO_CALIBSCALE),
1641 }, {
1642 .type = IIO_INTENSITY,
1643 .indexed = 1,
1644 .channel = 1,
1645 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1646 }, {
1647 .type = IIO_PROXIMITY,
1648 .indexed = 1,
1649 .channel = 0,
1650 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1651 },
1652 },
1653 .chan_table_elements = 4,
1654 .info = &tsl2772_device_info[ALSPRX],
1655 },
1656 [PRX2] = {
1657 .channel_with_events = {
1658 {
1659 .type = IIO_PROXIMITY,
1660 .indexed = 1,
1661 .channel = 0,
1662 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1663 BIT(IIO_CHAN_INFO_CALIBSCALE),
1664 .info_mask_separate_available =
1665 BIT(IIO_CHAN_INFO_CALIBSCALE),
1666 .event_spec = tsl2772_events,
1667 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1668 },
1669 },
1670 .channel_without_events = {
1671 {
1672 .type = IIO_PROXIMITY,
1673 .indexed = 1,
1674 .channel = 0,
1675 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1676 BIT(IIO_CHAN_INFO_CALIBSCALE),
1677 .info_mask_separate_available =
1678 BIT(IIO_CHAN_INFO_CALIBSCALE),
1679 },
1680 },
1681 .chan_table_elements = 1,
1682 .info = &tsl2772_device_info[PRX2],
1683 },
1684 [ALSPRX2] = {
1685 .channel_with_events = {
1686 {
1687 .type = IIO_LIGHT,
1688 .indexed = 1,
1689 .channel = 0,
1690 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1691 }, {
1692 .type = IIO_INTENSITY,
1693 .indexed = 1,
1694 .channel = 0,
1695 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1696 BIT(IIO_CHAN_INFO_INT_TIME) |
1697 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1698 BIT(IIO_CHAN_INFO_CALIBBIAS),
1699 .info_mask_separate_available =
1700 BIT(IIO_CHAN_INFO_INT_TIME) |
1701 BIT(IIO_CHAN_INFO_CALIBSCALE),
1702 .event_spec = tsl2772_events,
1703 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1704 }, {
1705 .type = IIO_INTENSITY,
1706 .indexed = 1,
1707 .channel = 1,
1708 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1709 }, {
1710 .type = IIO_PROXIMITY,
1711 .indexed = 1,
1712 .channel = 0,
1713 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1714 BIT(IIO_CHAN_INFO_CALIBSCALE),
1715 .info_mask_separate_available =
1716 BIT(IIO_CHAN_INFO_CALIBSCALE),
1717 .event_spec = tsl2772_events,
1718 .num_event_specs = ARRAY_SIZE(tsl2772_events),
1719 },
1720 },
1721 .channel_without_events = {
1722 {
1723 .type = IIO_LIGHT,
1724 .indexed = 1,
1725 .channel = 0,
1726 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1727 }, {
1728 .type = IIO_INTENSITY,
1729 .indexed = 1,
1730 .channel = 0,
1731 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1732 BIT(IIO_CHAN_INFO_INT_TIME) |
1733 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1734 BIT(IIO_CHAN_INFO_CALIBBIAS),
1735 .info_mask_separate_available =
1736 BIT(IIO_CHAN_INFO_INT_TIME) |
1737 BIT(IIO_CHAN_INFO_CALIBSCALE),
1738 }, {
1739 .type = IIO_INTENSITY,
1740 .indexed = 1,
1741 .channel = 1,
1742 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1743 }, {
1744 .type = IIO_PROXIMITY,
1745 .indexed = 1,
1746 .channel = 0,
1747 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1748 BIT(IIO_CHAN_INFO_CALIBSCALE),
1749 .info_mask_separate_available =
1750 BIT(IIO_CHAN_INFO_CALIBSCALE),
1751 },
1752 },
1753 .chan_table_elements = 4,
1754 .info = &tsl2772_device_info[ALSPRX2],
1755 },
1756 };
1757
1758 static int tsl2772_probe(struct i2c_client *clientp,
1759 const struct i2c_device_id *id)
1760 {
1761 struct iio_dev *indio_dev;
1762 struct tsl2772_chip *chip;
1763 int ret;
1764
1765 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
1766 if (!indio_dev)
1767 return -ENOMEM;
1768
1769 chip = iio_priv(indio_dev);
1770 chip->client = clientp;
1771 i2c_set_clientdata(clientp, indio_dev);
1772
1773 chip->supplies[TSL2772_SUPPLY_VDD].supply = "vdd";
1774 chip->supplies[TSL2772_SUPPLY_VDDIO].supply = "vddio";
1775
1776 ret = devm_regulator_bulk_get(&clientp->dev,
1777 ARRAY_SIZE(chip->supplies),
1778 chip->supplies);
1779 if (ret < 0) {
1780 if (ret != -EPROBE_DEFER)
1781 dev_err(&clientp->dev,
1782 "Failed to get regulators: %d\n",
1783 ret);
1784
1785 return ret;
1786 }
1787
1788 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies);
1789 if (ret < 0) {
1790 dev_err(&clientp->dev, "Failed to enable regulators: %d\n",
1791 ret);
1792 return ret;
1793 }
1794
1795 ret = devm_add_action_or_reset(&clientp->dev,
1796 tsl2772_disable_regulators_action,
1797 chip);
1798 if (ret < 0) {
1799 dev_err(&clientp->dev, "Failed to setup regulator cleanup action %d\n",
1800 ret);
1801 return ret;
1802 }
1803
1804 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME);
1805
1806 ret = i2c_smbus_read_byte_data(chip->client,
1807 TSL2772_CMD_REG | TSL2772_CHIPID);
1808 if (ret < 0)
1809 return ret;
1810
1811 if (tsl2772_device_id_verif(ret, id->driver_data) <= 0) {
1812 dev_info(&chip->client->dev,
1813 "%s: i2c device found does not match expected id\n",
1814 __func__);
1815 return -EINVAL;
1816 }
1817
1818 ret = i2c_smbus_write_byte(clientp, TSL2772_CMD_REG | TSL2772_CNTRL);
1819 if (ret < 0) {
1820 dev_err(&clientp->dev,
1821 "%s: Failed to write to CMD register: %d\n",
1822 __func__, ret);
1823 return ret;
1824 }
1825
1826 mutex_init(&chip->als_mutex);
1827 mutex_init(&chip->prox_mutex);
1828
1829 chip->tsl2772_chip_status = TSL2772_CHIP_UNKNOWN;
1830 chip->pdata = dev_get_platdata(&clientp->dev);
1831 chip->id = id->driver_data;
1832 chip->chip_info =
1833 &tsl2772_chip_info_tbl[device_channel_config[id->driver_data]];
1834
1835 indio_dev->info = chip->chip_info->info;
1836 indio_dev->dev.parent = &clientp->dev;
1837 indio_dev->modes = INDIO_DIRECT_MODE;
1838 indio_dev->name = chip->client->name;
1839 indio_dev->num_channels = chip->chip_info->chan_table_elements;
1840
1841 if (clientp->irq) {
1842 indio_dev->channels = chip->chip_info->channel_with_events;
1843
1844 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq,
1845 NULL,
1846 &tsl2772_event_handler,
1847 IRQF_TRIGGER_FALLING |
1848 IRQF_ONESHOT,
1849 "TSL2772_event",
1850 indio_dev);
1851 if (ret) {
1852 dev_err(&clientp->dev,
1853 "%s: irq request failed\n", __func__);
1854 return ret;
1855 }
1856 } else {
1857 indio_dev->channels = chip->chip_info->channel_without_events;
1858 }
1859
1860 tsl2772_defaults(chip);
1861 ret = tsl2772_chip_on(indio_dev);
1862 if (ret < 0)
1863 return ret;
1864
1865 ret = devm_add_action_or_reset(&clientp->dev,
1866 tsl2772_chip_off_action,
1867 indio_dev);
1868 if (ret < 0)
1869 return ret;
1870
1871 return devm_iio_device_register(&clientp->dev, indio_dev);
1872 }
1873
1874 static int tsl2772_suspend(struct device *dev)
1875 {
1876 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1877 struct tsl2772_chip *chip = iio_priv(indio_dev);
1878 int ret;
1879
1880 ret = tsl2772_chip_off(indio_dev);
1881 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies);
1882
1883 return ret;
1884 }
1885
1886 static int tsl2772_resume(struct device *dev)
1887 {
1888 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1889 struct tsl2772_chip *chip = iio_priv(indio_dev);
1890 int ret;
1891
1892 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies);
1893 if (ret < 0)
1894 return ret;
1895
1896 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME);
1897
1898 return tsl2772_chip_on(indio_dev);
1899 }
1900
1901 static const struct i2c_device_id tsl2772_idtable[] = {
1902 { "tsl2571", tsl2571 },
1903 { "tsl2671", tsl2671 },
1904 { "tmd2671", tmd2671 },
1905 { "tsl2771", tsl2771 },
1906 { "tmd2771", tmd2771 },
1907 { "tsl2572", tsl2572 },
1908 { "tsl2672", tsl2672 },
1909 { "tmd2672", tmd2672 },
1910 { "tsl2772", tsl2772 },
1911 { "tmd2772", tmd2772 },
1912 { "apds9930", apds9930},
1913 {}
1914 };
1915
1916 MODULE_DEVICE_TABLE(i2c, tsl2772_idtable);
1917
1918 static const struct of_device_id tsl2772_of_match[] = {
1919 { .compatible = "amstaos,tsl2571" },
1920 { .compatible = "amstaos,tsl2671" },
1921 { .compatible = "amstaos,tmd2671" },
1922 { .compatible = "amstaos,tsl2771" },
1923 { .compatible = "amstaos,tmd2771" },
1924 { .compatible = "amstaos,tsl2572" },
1925 { .compatible = "amstaos,tsl2672" },
1926 { .compatible = "amstaos,tmd2672" },
1927 { .compatible = "amstaos,tsl2772" },
1928 { .compatible = "amstaos,tmd2772" },
1929 { .compatible = "avago,apds9930" },
1930 {}
1931 };
1932 MODULE_DEVICE_TABLE(of, tsl2772_of_match);
1933
1934 static const struct dev_pm_ops tsl2772_pm_ops = {
1935 .suspend = tsl2772_suspend,
1936 .resume = tsl2772_resume,
1937 };
1938
1939 static struct i2c_driver tsl2772_driver = {
1940 .driver = {
1941 .name = "tsl2772",
1942 .of_match_table = tsl2772_of_match,
1943 .pm = &tsl2772_pm_ops,
1944 },
1945 .id_table = tsl2772_idtable,
1946 .probe = tsl2772_probe,
1947 };
1948
1949 module_i2c_driver(tsl2772_driver);
1950
1951 MODULE_AUTHOR("J. August Brenner <Jon.Brenner@ams.com>");
1952 MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
1953 MODULE_DESCRIPTION("TAOS tsl2772 ambient and proximity light sensor driver");
1954 MODULE_LICENSE("GPL");
Linux with added FPC-III support