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[mirror_ubuntu-artful-kernel.git] / drivers / staging / iio / light / tsl2x7x_core.c
1 /*
2 * Device driver for monitoring ambient light intensity in (lux)
3 * and proximity detection (prox) within the TAOS TSL2X7X family of devices.
4 *
5 * Copyright (c) 2012, TAOS Corporation.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 */
21
22 #include <linux/kernel.h>
23 #include <linux/i2c.h>
24 #include <linux/errno.h>
25 #include <linux/delay.h>
26 #include <linux/mutex.h>
27 #include <linux/interrupt.h>
28 #include <linux/slab.h>
29 #include <linux/module.h>
30 #include <linux/iio/events.h>
31 #include <linux/iio/iio.h>
32 #include <linux/iio/sysfs.h>
33 #include "tsl2x7x.h"
34
35 /* Cal defs*/
36 #define PROX_STAT_CAL 0
37 #define PROX_STAT_SAMP 1
38 #define MAX_SAMPLES_CAL 200
39
40 /* TSL2X7X Device ID */
41 #define TRITON_ID 0x00
42 #define SWORDFISH_ID 0x30
43 #define HALIBUT_ID 0x20
44
45 /* Lux calculation constants */
46 #define TSL2X7X_LUX_CALC_OVER_FLOW 65535
47
48 /* TAOS Register definitions - note:
49 * depending on device, some of these register are not used and the
50 * register address is benign.
51 */
52 /* 2X7X register offsets */
53 #define TSL2X7X_MAX_CONFIG_REG 16
54
55 /* Device Registers and Masks */
56 #define TSL2X7X_CNTRL 0x00
57 #define TSL2X7X_ALS_TIME 0X01
58 #define TSL2X7X_PRX_TIME 0x02
59 #define TSL2X7X_WAIT_TIME 0x03
60 #define TSL2X7X_ALS_MINTHRESHLO 0X04
61 #define TSL2X7X_ALS_MINTHRESHHI 0X05
62 #define TSL2X7X_ALS_MAXTHRESHLO 0X06
63 #define TSL2X7X_ALS_MAXTHRESHHI 0X07
64 #define TSL2X7X_PRX_MINTHRESHLO 0X08
65 #define TSL2X7X_PRX_MINTHRESHHI 0X09
66 #define TSL2X7X_PRX_MAXTHRESHLO 0X0A
67 #define TSL2X7X_PRX_MAXTHRESHHI 0X0B
68 #define TSL2X7X_PERSISTENCE 0x0C
69 #define TSL2X7X_PRX_CONFIG 0x0D
70 #define TSL2X7X_PRX_COUNT 0x0E
71 #define TSL2X7X_GAIN 0x0F
72 #define TSL2X7X_NOTUSED 0x10
73 #define TSL2X7X_REVID 0x11
74 #define TSL2X7X_CHIPID 0x12
75 #define TSL2X7X_STATUS 0x13
76 #define TSL2X7X_ALS_CHAN0LO 0x14
77 #define TSL2X7X_ALS_CHAN0HI 0x15
78 #define TSL2X7X_ALS_CHAN1LO 0x16
79 #define TSL2X7X_ALS_CHAN1HI 0x17
80 #define TSL2X7X_PRX_LO 0x18
81 #define TSL2X7X_PRX_HI 0x19
82
83 /* tsl2X7X cmd reg masks */
84 #define TSL2X7X_CMD_REG 0x80
85 #define TSL2X7X_CMD_SPL_FN 0x60
86
87 #define TSL2X7X_CMD_PROX_INT_CLR 0X05
88 #define TSL2X7X_CMD_ALS_INT_CLR 0x06
89 #define TSL2X7X_CMD_PROXALS_INT_CLR 0X07
90
91 /* tsl2X7X cntrl reg masks */
92 #define TSL2X7X_CNTL_ADC_ENBL 0x02
93 #define TSL2X7X_CNTL_PWR_ON 0x01
94
95 /* tsl2X7X status reg masks */
96 #define TSL2X7X_STA_ADC_VALID 0x01
97 #define TSL2X7X_STA_PRX_VALID 0x02
98 #define TSL2X7X_STA_ADC_PRX_VALID (TSL2X7X_STA_ADC_VALID |\
99 TSL2X7X_STA_PRX_VALID)
100 #define TSL2X7X_STA_ALS_INTR 0x10
101 #define TSL2X7X_STA_PRX_INTR 0x20
102
103 /* tsl2X7X cntrl reg masks */
104 #define TSL2X7X_CNTL_REG_CLEAR 0x00
105 #define TSL2X7X_CNTL_PROX_INT_ENBL 0X20
106 #define TSL2X7X_CNTL_ALS_INT_ENBL 0X10
107 #define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08
108 #define TSL2X7X_CNTL_PROX_DET_ENBL 0X04
109 #define TSL2X7X_CNTL_PWRON 0x01
110 #define TSL2X7X_CNTL_ALSPON_ENBL 0x03
111 #define TSL2X7X_CNTL_INTALSPON_ENBL 0x13
112 #define TSL2X7X_CNTL_PROXPON_ENBL 0x0F
113 #define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F
114
115 /*Prox diode to use */
116 #define TSL2X7X_DIODE0 0x10
117 #define TSL2X7X_DIODE1 0x20
118 #define TSL2X7X_DIODE_BOTH 0x30
119
120 /* LED Power */
121 #define TSL2X7X_mA100 0x00
122 #define TSL2X7X_mA50 0x40
123 #define TSL2X7X_mA25 0x80
124 #define TSL2X7X_mA13 0xD0
125 #define TSL2X7X_MAX_TIMER_CNT (0xFF)
126
127 #define TSL2X7X_MIN_ITIME 3
128
129 /* TAOS txx2x7x Device family members */
130 enum {
131 tsl2571,
132 tsl2671,
133 tmd2671,
134 tsl2771,
135 tmd2771,
136 tsl2572,
137 tsl2672,
138 tmd2672,
139 tsl2772,
140 tmd2772
141 };
142
143 enum {
144 TSL2X7X_CHIP_UNKNOWN = 0,
145 TSL2X7X_CHIP_WORKING = 1,
146 TSL2X7X_CHIP_SUSPENDED = 2
147 };
148
149 struct tsl2x7x_parse_result {
150 int integer;
151 int fract;
152 };
153
154 /* Per-device data */
155 struct tsl2x7x_als_info {
156 u16 als_ch0;
157 u16 als_ch1;
158 u16 lux;
159 };
160
161 struct tsl2x7x_prox_stat {
162 int min;
163 int max;
164 int mean;
165 unsigned long stddev;
166 };
167
168 struct tsl2x7x_chip_info {
169 int chan_table_elements;
170 struct iio_chan_spec channel[4];
171 const struct iio_info *info;
172 };
173
174 struct tsl2X7X_chip {
175 kernel_ulong_t id;
176 struct mutex prox_mutex;
177 struct mutex als_mutex;
178 struct i2c_client *client;
179 u16 prox_data;
180 struct tsl2x7x_als_info als_cur_info;
181 struct tsl2x7x_settings tsl2x7x_settings;
182 struct tsl2X7X_platform_data *pdata;
183 int als_time_scale;
184 int als_saturation;
185 int tsl2x7x_chip_status;
186 u8 tsl2x7x_config[TSL2X7X_MAX_CONFIG_REG];
187 const struct tsl2x7x_chip_info *chip_info;
188 const struct iio_info *info;
189 s64 event_timestamp;
190 /* This structure is intentionally large to accommodate
191 * updates via sysfs. */
192 /* Sized to 9 = max 8 segments + 1 termination segment */
193 struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_TABLE_SIZE];
194 };
195
196 /* Different devices require different coefficents */
197 static const struct tsl2x7x_lux tsl2x71_lux_table[] = {
198 { 14461, 611, 1211 },
199 { 18540, 352, 623 },
200 { 0, 0, 0 },
201 };
202
203 static const struct tsl2x7x_lux tmd2x71_lux_table[] = {
204 { 11635, 115, 256 },
205 { 15536, 87, 179 },
206 { 0, 0, 0 },
207 };
208
209 static const struct tsl2x7x_lux tsl2x72_lux_table[] = {
210 { 14013, 466, 917 },
211 { 18222, 310, 552 },
212 { 0, 0, 0 },
213 };
214
215 static const struct tsl2x7x_lux tmd2x72_lux_table[] = {
216 { 13218, 130, 262 },
217 { 17592, 92, 169 },
218 { 0, 0, 0 },
219 };
220
221 static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = {
222 [tsl2571] = tsl2x71_lux_table,
223 [tsl2671] = tsl2x71_lux_table,
224 [tmd2671] = tmd2x71_lux_table,
225 [tsl2771] = tsl2x71_lux_table,
226 [tmd2771] = tmd2x71_lux_table,
227 [tsl2572] = tsl2x72_lux_table,
228 [tsl2672] = tsl2x72_lux_table,
229 [tmd2672] = tmd2x72_lux_table,
230 [tsl2772] = tsl2x72_lux_table,
231 [tmd2772] = tmd2x72_lux_table,
232 };
233
234 static const struct tsl2x7x_settings tsl2x7x_default_settings = {
235 .als_time = 219, /* 101 ms */
236 .als_gain = 0,
237 .prx_time = 254, /* 5.4 ms */
238 .prox_gain = 1,
239 .wait_time = 245,
240 .prox_config = 0,
241 .als_gain_trim = 1000,
242 .als_cal_target = 150,
243 .als_thresh_low = 200,
244 .als_thresh_high = 256,
245 .persistence = 255,
246 .interrupts_en = 0,
247 .prox_thres_low = 0,
248 .prox_thres_high = 512,
249 .prox_max_samples_cal = 30,
250 .prox_pulse_count = 8
251 };
252
253 static const s16 tsl2X7X_als_gainadj[] = {
254 1,
255 8,
256 16,
257 120
258 };
259
260 static const s16 tsl2X7X_prx_gainadj[] = {
261 1,
262 2,
263 4,
264 8
265 };
266
267 /* Channel variations */
268 enum {
269 ALS,
270 PRX,
271 ALSPRX,
272 PRX2,
273 ALSPRX2,
274 };
275
276 static const u8 device_channel_config[] = {
277 ALS,
278 PRX,
279 PRX,
280 ALSPRX,
281 ALSPRX,
282 ALS,
283 PRX2,
284 PRX2,
285 ALSPRX2,
286 ALSPRX2
287 };
288
289 /**
290 * tsl2x7x_i2c_read() - Read a byte from a register.
291 * @client: i2c client
292 * @reg: device register to read from
293 * @*val: pointer to location to store register contents.
294 *
295 */
296 static int
297 tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
298 {
299 int ret = 0;
300
301 /* select register to write */
302 ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
303 if (ret < 0) {
304 dev_err(&client->dev, "%s: failed to write register %x\n"
305 , __func__, reg);
306 return ret;
307 }
308
309 /* read the data */
310 ret = i2c_smbus_read_byte(client);
311 if (ret >= 0)
312 *val = (u8)ret;
313 else
314 dev_err(&client->dev, "%s: failed to read register %x\n"
315 , __func__, reg);
316
317 return ret;
318 }
319
320 /**
321 * tsl2x7x_get_lux() - Reads and calculates current lux value.
322 * @indio_dev: pointer to IIO device
323 *
324 * The raw ch0 and ch1 values of the ambient light sensed in the last
325 * integration cycle are read from the device.
326 * Time scale factor array values are adjusted based on the integration time.
327 * The raw values are multiplied by a scale factor, and device gain is obtained
328 * using gain index. Limit checks are done next, then the ratio of a multiple
329 * of ch1 value, to the ch0 value, is calculated. Array tsl2x7x_device_lux[]
330 * is then scanned to find the first ratio value that is just above the ratio
331 * we just calculated. The ch0 and ch1 multiplier constants in the array are
332 * then used along with the time scale factor array values, to calculate the
333 * lux.
334 */
335 static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
336 {
337 u16 ch0, ch1; /* separated ch0/ch1 data from device */
338 u32 lux; /* raw lux calculated from device data */
339 u64 lux64;
340 u32 ratio;
341 u8 buf[4];
342 struct tsl2x7x_lux *p;
343 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
344 int i, ret;
345 u32 ch0lux = 0;
346 u32 ch1lux = 0;
347
348 if (mutex_trylock(&chip->als_mutex) == 0)
349 return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
350
351 if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
352 /* device is not enabled */
353 dev_err(&chip->client->dev, "%s: device is not enabled\n",
354 __func__);
355 ret = -EBUSY;
356 goto out_unlock;
357 }
358
359 ret = tsl2x7x_i2c_read(chip->client,
360 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
361 if (ret < 0) {
362 dev_err(&chip->client->dev,
363 "%s: Failed to read STATUS Reg\n", __func__);
364 goto out_unlock;
365 }
366 /* is data new & valid */
367 if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
368 dev_err(&chip->client->dev,
369 "%s: data not valid yet\n", __func__);
370 ret = chip->als_cur_info.lux; /* return LAST VALUE */
371 goto out_unlock;
372 }
373
374 for (i = 0; i < 4; i++) {
375 ret = tsl2x7x_i2c_read(chip->client,
376 (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
377 &buf[i]);
378 if (ret < 0) {
379 dev_err(&chip->client->dev,
380 "%s: failed to read. err=%x\n", __func__, ret);
381 goto out_unlock;
382 }
383 }
384
385 /* clear any existing interrupt status */
386 ret = i2c_smbus_write_byte(chip->client,
387 (TSL2X7X_CMD_REG |
388 TSL2X7X_CMD_SPL_FN |
389 TSL2X7X_CMD_ALS_INT_CLR));
390 if (ret < 0) {
391 dev_err(&chip->client->dev,
392 "%s: i2c_write_command failed - err = %d\n",
393 __func__, ret);
394 goto out_unlock; /* have no data, so return failure */
395 }
396
397 /* extract ALS/lux data */
398 ch0 = le16_to_cpup((const __le16 *)&buf[0]);
399 ch1 = le16_to_cpup((const __le16 *)&buf[2]);
400
401 chip->als_cur_info.als_ch0 = ch0;
402 chip->als_cur_info.als_ch1 = ch1;
403
404 if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) {
405 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
406 goto return_max;
407 }
408
409 if (ch0 == 0) {
410 /* have no data, so return LAST VALUE */
411 ret = chip->als_cur_info.lux;
412 goto out_unlock;
413 }
414 /* calculate ratio */
415 ratio = (ch1 << 15) / ch0;
416 /* convert to unscaled lux using the pointer to the table */
417 p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
418 while (p->ratio != 0 && p->ratio < ratio)
419 p++;
420
421 if (p->ratio == 0) {
422 lux = 0;
423 } else {
424 ch0lux = DIV_ROUND_UP((ch0 * p->ch0),
425 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
426 ch1lux = DIV_ROUND_UP((ch1 * p->ch1),
427 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
428 lux = ch0lux - ch1lux;
429 }
430
431 /* note: lux is 31 bit max at this point */
432 if (ch1lux > ch0lux) {
433 dev_dbg(&chip->client->dev, "ch1lux > ch0lux-return last value\n");
434 ret = chip->als_cur_info.lux;
435 goto out_unlock;
436 }
437
438 /* adjust for active time scale */
439 if (chip->als_time_scale == 0)
440 lux = 0;
441 else
442 lux = (lux + (chip->als_time_scale >> 1)) /
443 chip->als_time_scale;
444
445 /* adjust for active gain scale
446 * The tsl2x7x_device_lux tables have a factor of 256 built-in.
447 * User-specified gain provides a multiplier.
448 * Apply user-specified gain before shifting right to retain precision.
449 * Use 64 bits to avoid overflow on multiplication.
450 * Then go back to 32 bits before division to avoid using div_u64().
451 */
452
453 lux64 = lux;
454 lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
455 lux64 >>= 8;
456 lux = lux64;
457 lux = (lux + 500) / 1000;
458
459 if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */
460 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
461
462 /* Update the structure with the latest lux. */
463 return_max:
464 chip->als_cur_info.lux = lux;
465 ret = lux;
466
467 out_unlock:
468 mutex_unlock(&chip->als_mutex);
469
470 return ret;
471 }
472
473 /**
474 * tsl2x7x_get_prox() - Reads proximity data registers and updates
475 * chip->prox_data.
476 *
477 * @indio_dev: pointer to IIO device
478 */
479 static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
480 {
481 int i;
482 int ret;
483 u8 status;
484 u8 chdata[2];
485 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
486
487 if (mutex_trylock(&chip->prox_mutex) == 0) {
488 dev_err(&chip->client->dev,
489 "%s: Can't get prox mutex\n", __func__);
490 return -EBUSY;
491 }
492
493 ret = tsl2x7x_i2c_read(chip->client,
494 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
495 if (ret < 0) {
496 dev_err(&chip->client->dev,
497 "%s: i2c err=%d\n", __func__, ret);
498 goto prox_poll_err;
499 }
500
501 switch (chip->id) {
502 case tsl2571:
503 case tsl2671:
504 case tmd2671:
505 case tsl2771:
506 case tmd2771:
507 if (!(status & TSL2X7X_STA_ADC_VALID))
508 goto prox_poll_err;
509 break;
510 case tsl2572:
511 case tsl2672:
512 case tmd2672:
513 case tsl2772:
514 case tmd2772:
515 if (!(status & TSL2X7X_STA_PRX_VALID))
516 goto prox_poll_err;
517 break;
518 }
519
520 for (i = 0; i < 2; i++) {
521 ret = tsl2x7x_i2c_read(chip->client,
522 (TSL2X7X_CMD_REG |
523 (TSL2X7X_PRX_LO + i)), &chdata[i]);
524 if (ret < 0)
525 goto prox_poll_err;
526 }
527
528 chip->prox_data =
529 le16_to_cpup((const __le16 *)&chdata[0]);
530
531 prox_poll_err:
532
533 mutex_unlock(&chip->prox_mutex);
534
535 return chip->prox_data;
536 }
537
538 /**
539 * tsl2x7x_defaults() - Populates the device nominal operating parameters
540 * with those provided by a 'platform' data struct or
541 * with prefined defaults.
542 *
543 * @chip: pointer to device structure.
544 */
545 static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
546 {
547 /* If Operational settings defined elsewhere.. */
548 if (chip->pdata && chip->pdata->platform_default_settings)
549 memcpy(&(chip->tsl2x7x_settings),
550 chip->pdata->platform_default_settings,
551 sizeof(tsl2x7x_default_settings));
552 else
553 memcpy(&(chip->tsl2x7x_settings),
554 &tsl2x7x_default_settings,
555 sizeof(tsl2x7x_default_settings));
556
557 /* Load up the proper lux table. */
558 if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0)
559 memcpy(chip->tsl2x7x_device_lux,
560 chip->pdata->platform_lux_table,
561 sizeof(chip->pdata->platform_lux_table));
562 else
563 memcpy(chip->tsl2x7x_device_lux,
564 (struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
565 MAX_DEFAULT_TABLE_BYTES);
566 }
567
568 /**
569 * tsl2x7x_als_calibrate() - Obtain single reading and calculate
570 * the als_gain_trim.
571 *
572 * @indio_dev: pointer to IIO device
573 */
574 static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
575 {
576 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
577 u8 reg_val;
578 int gain_trim_val;
579 int ret;
580 int lux_val;
581
582 ret = i2c_smbus_write_byte(chip->client,
583 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
584 if (ret < 0) {
585 dev_err(&chip->client->dev,
586 "%s: failed to write CNTRL register, ret=%d\n",
587 __func__, ret);
588 return ret;
589 }
590
591 reg_val = i2c_smbus_read_byte(chip->client);
592 if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
593 != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
594 dev_err(&chip->client->dev,
595 "%s: failed: ADC not enabled\n", __func__);
596 return -1;
597 }
598
599 ret = i2c_smbus_write_byte(chip->client,
600 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
601 if (ret < 0) {
602 dev_err(&chip->client->dev,
603 "%s: failed to write ctrl reg: ret=%d\n",
604 __func__, ret);
605 return ret;
606 }
607
608 reg_val = i2c_smbus_read_byte(chip->client);
609 if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
610 dev_err(&chip->client->dev,
611 "%s: failed: STATUS - ADC not valid.\n", __func__);
612 return -ENODATA;
613 }
614
615 lux_val = tsl2x7x_get_lux(indio_dev);
616 if (lux_val < 0) {
617 dev_err(&chip->client->dev,
618 "%s: failed to get lux\n", __func__);
619 return lux_val;
620 }
621
622 gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target)
623 * chip->tsl2x7x_settings.als_gain_trim) / lux_val);
624 if ((gain_trim_val < 250) || (gain_trim_val > 4000))
625 return -ERANGE;
626
627 chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
628 dev_info(&chip->client->dev,
629 "%s als_calibrate completed\n", chip->client->name);
630
631 return (int) gain_trim_val;
632 }
633
634 static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
635 {
636 int i;
637 int ret = 0;
638 u8 *dev_reg;
639 u8 utmp;
640 int als_count;
641 int als_time;
642 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
643 u8 reg_val = 0;
644
645 if (chip->pdata && chip->pdata->power_on)
646 chip->pdata->power_on(indio_dev);
647
648 /* Non calculated parameters */
649 chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
650 chip->tsl2x7x_settings.prx_time;
651 chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
652 chip->tsl2x7x_settings.wait_time;
653 chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
654 chip->tsl2x7x_settings.prox_config;
655
656 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
657 (chip->tsl2x7x_settings.als_thresh_low) & 0xFF;
658 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
659 (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF;
660 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
661 (chip->tsl2x7x_settings.als_thresh_high) & 0xFF;
662 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
663 (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF;
664 chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
665 chip->tsl2x7x_settings.persistence;
666
667 chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
668 chip->tsl2x7x_settings.prox_pulse_count;
669 chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
670 chip->tsl2x7x_settings.prox_thres_low;
671 chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
672 chip->tsl2x7x_settings.prox_thres_high;
673
674 /* and make sure we're not already on */
675 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
676 /* if forcing a register update - turn off, then on */
677 dev_info(&chip->client->dev, "device is already enabled\n");
678 return -EINVAL;
679 }
680
681 /* determine als integration register */
682 als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
683 if (als_count == 0)
684 als_count = 1; /* ensure at least one cycle */
685
686 /* convert back to time (encompasses overrides) */
687 als_time = (als_count * 27 + 5) / 10;
688 chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
689
690 /* Set the gain based on tsl2x7x_settings struct */
691 chip->tsl2x7x_config[TSL2X7X_GAIN] =
692 (chip->tsl2x7x_settings.als_gain |
693 (TSL2X7X_mA100 | TSL2X7X_DIODE1)
694 | ((chip->tsl2x7x_settings.prox_gain) << 2));
695
696 /* set chip struct re scaling and saturation */
697 chip->als_saturation = als_count * 922; /* 90% of full scale */
698 chip->als_time_scale = (als_time + 25) / 50;
699
700 /* TSL2X7X Specific power-on / adc enable sequence
701 * Power on the device 1st. */
702 utmp = TSL2X7X_CNTL_PWR_ON;
703 ret = i2c_smbus_write_byte_data(chip->client,
704 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
705 if (ret < 0) {
706 dev_err(&chip->client->dev,
707 "%s: failed on CNTRL reg.\n", __func__);
708 return ret;
709 }
710
711 /* Use the following shadow copy for our delay before enabling ADC.
712 * Write all the registers. */
713 for (i = 0, dev_reg = chip->tsl2x7x_config;
714 i < TSL2X7X_MAX_CONFIG_REG; i++) {
715 ret = i2c_smbus_write_byte_data(chip->client,
716 TSL2X7X_CMD_REG + i, *dev_reg++);
717 if (ret < 0) {
718 dev_err(&chip->client->dev,
719 "%s: failed on write to reg %d.\n", __func__, i);
720 return ret;
721 }
722 }
723
724 mdelay(3); /* Power-on settling time */
725
726 /* NOW enable the ADC
727 * initialize the desired mode of operation */
728 utmp = TSL2X7X_CNTL_PWR_ON |
729 TSL2X7X_CNTL_ADC_ENBL |
730 TSL2X7X_CNTL_PROX_DET_ENBL;
731 ret = i2c_smbus_write_byte_data(chip->client,
732 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
733 if (ret < 0) {
734 dev_err(&chip->client->dev,
735 "%s: failed on 2nd CTRL reg.\n", __func__);
736 return ret;
737 }
738
739 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
740
741 if (chip->tsl2x7x_settings.interrupts_en != 0) {
742 dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
743
744 reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
745 if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
746 (chip->tsl2x7x_settings.interrupts_en == 0x30))
747 reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
748
749 reg_val |= chip->tsl2x7x_settings.interrupts_en;
750 ret = i2c_smbus_write_byte_data(chip->client,
751 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
752 if (ret < 0)
753 dev_err(&chip->client->dev,
754 "%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
755 __func__);
756
757 /* Clear out any initial interrupts */
758 ret = i2c_smbus_write_byte(chip->client,
759 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
760 TSL2X7X_CMD_PROXALS_INT_CLR);
761 if (ret < 0) {
762 dev_err(&chip->client->dev,
763 "%s: Failed to clear Int status\n",
764 __func__);
765 return ret;
766 }
767 }
768
769 return ret;
770 }
771
772 static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
773 {
774 int ret;
775 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
776
777 /* turn device off */
778 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
779
780 ret = i2c_smbus_write_byte_data(chip->client,
781 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
782
783 if (chip->pdata && chip->pdata->power_off)
784 chip->pdata->power_off(chip->client);
785
786 return ret;
787 }
788
789 /**
790 * tsl2x7x_invoke_change
791 * @indio_dev: pointer to IIO device
792 *
793 * Obtain and lock both ALS and PROX resources,
794 * determine and save device state (On/Off),
795 * cycle device to implement updated parameter,
796 * put device back into proper state, and unlock
797 * resource.
798 */
799 static
800 int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
801 {
802 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
803 int device_status = chip->tsl2x7x_chip_status;
804
805 mutex_lock(&chip->als_mutex);
806 mutex_lock(&chip->prox_mutex);
807
808 if (device_status == TSL2X7X_CHIP_WORKING)
809 tsl2x7x_chip_off(indio_dev);
810
811 tsl2x7x_chip_on(indio_dev);
812
813 if (device_status != TSL2X7X_CHIP_WORKING)
814 tsl2x7x_chip_off(indio_dev);
815
816 mutex_unlock(&chip->prox_mutex);
817 mutex_unlock(&chip->als_mutex);
818
819 return 0;
820 }
821
822 static
823 void tsl2x7x_prox_calculate(int *data, int length,
824 struct tsl2x7x_prox_stat *statP)
825 {
826 int i;
827 int sample_sum;
828 int tmp;
829
830 if (length == 0)
831 length = 1;
832
833 sample_sum = 0;
834 statP->min = INT_MAX;
835 statP->max = INT_MIN;
836 for (i = 0; i < length; i++) {
837 sample_sum += data[i];
838 statP->min = min(statP->min, data[i]);
839 statP->max = max(statP->max, data[i]);
840 }
841
842 statP->mean = sample_sum / length;
843 sample_sum = 0;
844 for (i = 0; i < length; i++) {
845 tmp = data[i] - statP->mean;
846 sample_sum += tmp * tmp;
847 }
848 statP->stddev = int_sqrt((long)sample_sum)/length;
849 }
850
851 /**
852 * tsl2x7x_prox_cal() - Calculates std. and sets thresholds.
853 * @indio_dev: pointer to IIO device
854 *
855 * Calculates a standard deviation based on the samples,
856 * and sets the threshold accordingly.
857 */
858 static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
859 {
860 int prox_history[MAX_SAMPLES_CAL + 1];
861 int i;
862 struct tsl2x7x_prox_stat prox_stat_data[2];
863 struct tsl2x7x_prox_stat *calP;
864 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
865 u8 tmp_irq_settings;
866 u8 current_state = chip->tsl2x7x_chip_status;
867
868 if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) {
869 dev_err(&chip->client->dev,
870 "%s: max prox samples cal is too big: %d\n",
871 __func__, chip->tsl2x7x_settings.prox_max_samples_cal);
872 chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
873 }
874
875 /* have to stop to change settings */
876 tsl2x7x_chip_off(indio_dev);
877
878 /* Enable proximity detection save just in case prox not wanted yet*/
879 tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
880 chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL;
881
882 /*turn on device if not already on*/
883 tsl2x7x_chip_on(indio_dev);
884
885 /*gather the samples*/
886 for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
887 mdelay(15);
888 tsl2x7x_get_prox(indio_dev);
889 prox_history[i] = chip->prox_data;
890 dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
891 i, chip->prox_data);
892 }
893
894 tsl2x7x_chip_off(indio_dev);
895 calP = &prox_stat_data[PROX_STAT_CAL];
896 tsl2x7x_prox_calculate(prox_history,
897 chip->tsl2x7x_settings.prox_max_samples_cal, calP);
898 chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean;
899
900 dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
901 calP->min, calP->mean, calP->max);
902 dev_info(&chip->client->dev,
903 "%s proximity threshold set to %d\n",
904 chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
905
906 /* back to the way they were */
907 chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
908 if (current_state == TSL2X7X_CHIP_WORKING)
909 tsl2x7x_chip_on(indio_dev);
910 }
911
912 static ssize_t tsl2x7x_power_state_show(struct device *dev,
913 struct device_attribute *attr, char *buf)
914 {
915 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
916
917 return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
918 }
919
920 static ssize_t tsl2x7x_power_state_store(struct device *dev,
921 struct device_attribute *attr, const char *buf, size_t len)
922 {
923 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
924 bool value;
925
926 if (strtobool(buf, &value))
927 return -EINVAL;
928
929 if (value)
930 tsl2x7x_chip_on(indio_dev);
931 else
932 tsl2x7x_chip_off(indio_dev);
933
934 return len;
935 }
936
937 static ssize_t tsl2x7x_gain_available_show(struct device *dev,
938 struct device_attribute *attr, char *buf)
939 {
940 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
941
942 switch (chip->id) {
943 case tsl2571:
944 case tsl2671:
945 case tmd2671:
946 case tsl2771:
947 case tmd2771:
948 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
949 }
950
951 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
952 }
953
954 static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev,
955 struct device_attribute *attr, char *buf)
956 {
957 return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
958 }
959
960 static ssize_t tsl2x7x_als_time_show(struct device *dev,
961 struct device_attribute *attr, char *buf)
962 {
963 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
964 int y, z;
965
966 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
967 z = y * TSL2X7X_MIN_ITIME;
968 y /= 1000;
969 z %= 1000;
970
971 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
972 }
973
974 static ssize_t tsl2x7x_als_time_store(struct device *dev,
975 struct device_attribute *attr, const char *buf, size_t len)
976 {
977 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
978 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
979 struct tsl2x7x_parse_result result;
980 int ret;
981
982 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
983 if (ret)
984 return ret;
985
986 result.fract /= 3;
987 chip->tsl2x7x_settings.als_time =
988 (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract);
989
990 dev_info(&chip->client->dev, "%s: als time = %d",
991 __func__, chip->tsl2x7x_settings.als_time);
992
993 tsl2x7x_invoke_change(indio_dev);
994
995 return IIO_VAL_INT_PLUS_MICRO;
996 }
997
998 static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
999 ".00272 - .696");
1000
1001 static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
1002 struct device_attribute *attr, char *buf)
1003 {
1004 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1005
1006 return snprintf(buf, PAGE_SIZE, "%d\n",
1007 chip->tsl2x7x_settings.als_cal_target);
1008 }
1009
1010 static ssize_t tsl2x7x_als_cal_target_store(struct device *dev,
1011 struct device_attribute *attr, const char *buf, size_t len)
1012 {
1013 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1014 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1015 unsigned long value;
1016
1017 if (kstrtoul(buf, 0, &value))
1018 return -EINVAL;
1019
1020 if (value)
1021 chip->tsl2x7x_settings.als_cal_target = value;
1022
1023 tsl2x7x_invoke_change(indio_dev);
1024
1025 return len;
1026 }
1027
1028 /* persistence settings */
1029 static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
1030 struct device_attribute *attr, char *buf)
1031 {
1032 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1033 int y, z, filter_delay;
1034
1035 /* Determine integration time */
1036 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1037 z = y * TSL2X7X_MIN_ITIME;
1038 filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F);
1039 y = (filter_delay / 1000);
1040 z = (filter_delay % 1000);
1041
1042 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1043 }
1044
1045 static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
1046 struct device_attribute *attr, const char *buf, size_t len)
1047 {
1048 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1049 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1050 struct tsl2x7x_parse_result result;
1051 int y, z, filter_delay;
1052 int ret;
1053
1054 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
1055 if (ret)
1056 return ret;
1057
1058 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1059 z = y * TSL2X7X_MIN_ITIME;
1060
1061 filter_delay =
1062 DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
1063
1064 chip->tsl2x7x_settings.persistence &= 0xF0;
1065 chip->tsl2x7x_settings.persistence |= (filter_delay & 0x0F);
1066
1067 dev_info(&chip->client->dev, "%s: als persistence = %d",
1068 __func__, filter_delay);
1069
1070 tsl2x7x_invoke_change(indio_dev);
1071
1072 return IIO_VAL_INT_PLUS_MICRO;
1073 }
1074
1075 static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
1076 struct device_attribute *attr, char *buf)
1077 {
1078 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1079 int y, z, filter_delay;
1080
1081 /* Determine integration time */
1082 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1083 z = y * TSL2X7X_MIN_ITIME;
1084 filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4);
1085 y = (filter_delay / 1000);
1086 z = (filter_delay % 1000);
1087
1088 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1089 }
1090
1091 static ssize_t tsl2x7x_prox_persistence_store(struct device *dev,
1092 struct device_attribute *attr, const char *buf, size_t len)
1093 {
1094 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1095 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1096 struct tsl2x7x_parse_result result;
1097 int y, z, filter_delay;
1098 int ret;
1099
1100 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
1101 if (ret)
1102 return ret;
1103
1104 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1105 z = y * TSL2X7X_MIN_ITIME;
1106
1107 filter_delay =
1108 DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
1109
1110 chip->tsl2x7x_settings.persistence &= 0x0F;
1111 chip->tsl2x7x_settings.persistence |= ((filter_delay << 4) & 0xF0);
1112
1113 dev_info(&chip->client->dev, "%s: prox persistence = %d",
1114 __func__, filter_delay);
1115
1116 tsl2x7x_invoke_change(indio_dev);
1117
1118 return IIO_VAL_INT_PLUS_MICRO;
1119 }
1120
1121 static ssize_t tsl2x7x_do_calibrate(struct device *dev,
1122 struct device_attribute *attr, const char *buf, size_t len)
1123 {
1124 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1125 bool value;
1126
1127 if (strtobool(buf, &value))
1128 return -EINVAL;
1129
1130 if (value)
1131 tsl2x7x_als_calibrate(indio_dev);
1132
1133 tsl2x7x_invoke_change(indio_dev);
1134
1135 return len;
1136 }
1137
1138 static ssize_t tsl2x7x_luxtable_show(struct device *dev,
1139 struct device_attribute *attr, char *buf)
1140 {
1141 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1142 int i = 0;
1143 int offset = 0;
1144
1145 while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) {
1146 offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,",
1147 chip->tsl2x7x_device_lux[i].ratio,
1148 chip->tsl2x7x_device_lux[i].ch0,
1149 chip->tsl2x7x_device_lux[i].ch1);
1150 if (chip->tsl2x7x_device_lux[i].ratio == 0) {
1151 /* We just printed the first "0" entry.
1152 * Now get rid of the extra "," and break. */
1153 offset--;
1154 break;
1155 }
1156 i++;
1157 }
1158
1159 offset += snprintf(buf + offset, PAGE_SIZE, "\n");
1160 return offset;
1161 }
1162
1163 static ssize_t tsl2x7x_luxtable_store(struct device *dev,
1164 struct device_attribute *attr, const char *buf, size_t len)
1165 {
1166 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1167 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1168 int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1];
1169 int n;
1170
1171 get_options(buf, ARRAY_SIZE(value), value);
1172
1173 /* We now have an array of ints starting at value[1], and
1174 * enumerated by value[0].
1175 * We expect each group of three ints is one table entry,
1176 * and the last table entry is all 0.
1177 */
1178 n = value[0];
1179 if ((n % 3) || n < 6 ||
1180 n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) {
1181 dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n);
1182 return -EINVAL;
1183 }
1184
1185 if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) {
1186 dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n);
1187 return -EINVAL;
1188 }
1189
1190 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
1191 tsl2x7x_chip_off(indio_dev);
1192
1193 /* Zero out the table */
1194 memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));
1195 memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4));
1196
1197 tsl2x7x_invoke_change(indio_dev);
1198
1199 return len;
1200 }
1201
1202 static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev,
1203 struct device_attribute *attr, const char *buf, size_t len)
1204 {
1205 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1206 bool value;
1207
1208 if (strtobool(buf, &value))
1209 return -EINVAL;
1210
1211 if (value)
1212 tsl2x7x_prox_cal(indio_dev);
1213
1214 tsl2x7x_invoke_change(indio_dev);
1215
1216 return len;
1217 }
1218
1219 static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
1220 const struct iio_chan_spec *chan,
1221 enum iio_event_type type,
1222 enum iio_event_direction dir)
1223 {
1224 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1225 int ret;
1226
1227 if (chan->type == IIO_INTENSITY)
1228 ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10);
1229 else
1230 ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20);
1231
1232 return ret;
1233 }
1234
1235 static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
1236 const struct iio_chan_spec *chan,
1237 enum iio_event_type type,
1238 enum iio_event_direction dir,
1239 int val)
1240 {
1241 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1242
1243 if (chan->type == IIO_INTENSITY) {
1244 if (val)
1245 chip->tsl2x7x_settings.interrupts_en |= 0x10;
1246 else
1247 chip->tsl2x7x_settings.interrupts_en &= 0x20;
1248 } else {
1249 if (val)
1250 chip->tsl2x7x_settings.interrupts_en |= 0x20;
1251 else
1252 chip->tsl2x7x_settings.interrupts_en &= 0x10;
1253 }
1254
1255 tsl2x7x_invoke_change(indio_dev);
1256
1257 return 0;
1258 }
1259
1260 static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
1261 const struct iio_chan_spec *chan,
1262 enum iio_event_type type,
1263 enum iio_event_direction dir,
1264 enum iio_event_info info,
1265 int val, int val2)
1266 {
1267 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1268
1269 if (chan->type == IIO_INTENSITY) {
1270 switch (dir) {
1271 case IIO_EV_DIR_RISING:
1272 chip->tsl2x7x_settings.als_thresh_high = val;
1273 break;
1274 case IIO_EV_DIR_FALLING:
1275 chip->tsl2x7x_settings.als_thresh_low = val;
1276 break;
1277 default:
1278 return -EINVAL;
1279 }
1280 } else {
1281 switch (dir) {
1282 case IIO_EV_DIR_RISING:
1283 chip->tsl2x7x_settings.prox_thres_high = val;
1284 break;
1285 case IIO_EV_DIR_FALLING:
1286 chip->tsl2x7x_settings.prox_thres_low = val;
1287 break;
1288 default:
1289 return -EINVAL;
1290 }
1291 }
1292
1293 tsl2x7x_invoke_change(indio_dev);
1294
1295 return 0;
1296 }
1297
1298 static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
1299 const struct iio_chan_spec *chan,
1300 enum iio_event_type type,
1301 enum iio_event_direction dir,
1302 enum iio_event_info info,
1303 int *val, int *val2)
1304 {
1305 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1306
1307 if (chan->type == IIO_INTENSITY) {
1308 switch (dir) {
1309 case IIO_EV_DIR_RISING:
1310 *val = chip->tsl2x7x_settings.als_thresh_high;
1311 break;
1312 case IIO_EV_DIR_FALLING:
1313 *val = chip->tsl2x7x_settings.als_thresh_low;
1314 break;
1315 default:
1316 return -EINVAL;
1317 }
1318 } else {
1319 switch (dir) {
1320 case IIO_EV_DIR_RISING:
1321 *val = chip->tsl2x7x_settings.prox_thres_high;
1322 break;
1323 case IIO_EV_DIR_FALLING:
1324 *val = chip->tsl2x7x_settings.prox_thres_low;
1325 break;
1326 default:
1327 return -EINVAL;
1328 }
1329 }
1330
1331 return IIO_VAL_INT;
1332 }
1333
1334 static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
1335 struct iio_chan_spec const *chan,
1336 int *val,
1337 int *val2,
1338 long mask)
1339 {
1340 int ret = -EINVAL;
1341 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1342
1343 switch (mask) {
1344 case IIO_CHAN_INFO_PROCESSED:
1345 switch (chan->type) {
1346 case IIO_LIGHT:
1347 tsl2x7x_get_lux(indio_dev);
1348 *val = chip->als_cur_info.lux;
1349 ret = IIO_VAL_INT;
1350 break;
1351 default:
1352 return -EINVAL;
1353 }
1354 break;
1355 case IIO_CHAN_INFO_RAW:
1356 switch (chan->type) {
1357 case IIO_INTENSITY:
1358 tsl2x7x_get_lux(indio_dev);
1359 if (chan->channel == 0)
1360 *val = chip->als_cur_info.als_ch0;
1361 else
1362 *val = chip->als_cur_info.als_ch1;
1363 ret = IIO_VAL_INT;
1364 break;
1365 case IIO_PROXIMITY:
1366 tsl2x7x_get_prox(indio_dev);
1367 *val = chip->prox_data;
1368 ret = IIO_VAL_INT;
1369 break;
1370 default:
1371 return -EINVAL;
1372 }
1373 break;
1374 case IIO_CHAN_INFO_CALIBSCALE:
1375 if (chan->type == IIO_LIGHT)
1376 *val =
1377 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
1378 else
1379 *val =
1380 tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain];
1381 ret = IIO_VAL_INT;
1382 break;
1383 case IIO_CHAN_INFO_CALIBBIAS:
1384 *val = chip->tsl2x7x_settings.als_gain_trim;
1385 ret = IIO_VAL_INT;
1386 break;
1387
1388 default:
1389 ret = -EINVAL;
1390 }
1391
1392 return ret;
1393 }
1394
1395 static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
1396 struct iio_chan_spec const *chan,
1397 int val,
1398 int val2,
1399 long mask)
1400 {
1401 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1402
1403 switch (mask) {
1404 case IIO_CHAN_INFO_CALIBSCALE:
1405 if (chan->type == IIO_INTENSITY) {
1406 switch (val) {
1407 case 1:
1408 chip->tsl2x7x_settings.als_gain = 0;
1409 break;
1410 case 8:
1411 chip->tsl2x7x_settings.als_gain = 1;
1412 break;
1413 case 16:
1414 chip->tsl2x7x_settings.als_gain = 2;
1415 break;
1416 case 120:
1417 switch (chip->id) {
1418 case tsl2572:
1419 case tsl2672:
1420 case tmd2672:
1421 case tsl2772:
1422 case tmd2772:
1423 return -EINVAL;
1424 }
1425 chip->tsl2x7x_settings.als_gain = 3;
1426 break;
1427 case 128:
1428 switch (chip->id) {
1429 case tsl2571:
1430 case tsl2671:
1431 case tmd2671:
1432 case tsl2771:
1433 case tmd2771:
1434 return -EINVAL;
1435 }
1436 chip->tsl2x7x_settings.als_gain = 3;
1437 break;
1438 default:
1439 return -EINVAL;
1440 }
1441 } else {
1442 switch (val) {
1443 case 1:
1444 chip->tsl2x7x_settings.prox_gain = 0;
1445 break;
1446 case 2:
1447 chip->tsl2x7x_settings.prox_gain = 1;
1448 break;
1449 case 4:
1450 chip->tsl2x7x_settings.prox_gain = 2;
1451 break;
1452 case 8:
1453 chip->tsl2x7x_settings.prox_gain = 3;
1454 break;
1455 default:
1456 return -EINVAL;
1457 }
1458 }
1459 break;
1460 case IIO_CHAN_INFO_CALIBBIAS:
1461 chip->tsl2x7x_settings.als_gain_trim = val;
1462 break;
1463
1464 default:
1465 return -EINVAL;
1466 }
1467
1468 tsl2x7x_invoke_change(indio_dev);
1469
1470 return 0;
1471 }
1472
1473 static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
1474 tsl2x7x_power_state_show, tsl2x7x_power_state_store);
1475
1476 static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO,
1477 tsl2x7x_prox_gain_available_show, NULL);
1478
1479 static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO,
1480 tsl2x7x_gain_available_show, NULL);
1481
1482 static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR,
1483 tsl2x7x_als_time_show, tsl2x7x_als_time_store);
1484
1485 static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR,
1486 tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
1487
1488 static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL,
1489 tsl2x7x_do_calibrate);
1490
1491 static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL,
1492 tsl2x7x_do_prox_calibrate);
1493
1494 static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR,
1495 tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
1496
1497 static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR,
1498 tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
1499
1500 static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR,
1501 tsl2x7x_prox_persistence_show, tsl2x7x_prox_persistence_store);
1502
1503 /* Use the default register values to identify the Taos device */
1504 static int tsl2x7x_device_id(unsigned char *id, int target)
1505 {
1506 switch (target) {
1507 case tsl2571:
1508 case tsl2671:
1509 case tsl2771:
1510 return (*id & 0xf0) == TRITON_ID;
1511 case tmd2671:
1512 case tmd2771:
1513 return (*id & 0xf0) == HALIBUT_ID;
1514 case tsl2572:
1515 case tsl2672:
1516 case tmd2672:
1517 case tsl2772:
1518 case tmd2772:
1519 return (*id & 0xf0) == SWORDFISH_ID;
1520 }
1521
1522 return -EINVAL;
1523 }
1524
1525 static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
1526 {
1527 struct iio_dev *indio_dev = private;
1528 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1529 s64 timestamp = iio_get_time_ns();
1530 int ret;
1531 u8 value;
1532
1533 value = i2c_smbus_read_byte_data(chip->client,
1534 TSL2X7X_CMD_REG | TSL2X7X_STATUS);
1535
1536 /* What type of interrupt do we need to process */
1537 if (value & TSL2X7X_STA_PRX_INTR) {
1538 tsl2x7x_get_prox(indio_dev); /* freshen data for ABI */
1539 iio_push_event(indio_dev,
1540 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
1541 0,
1542 IIO_EV_TYPE_THRESH,
1543 IIO_EV_DIR_EITHER),
1544 timestamp);
1545 }
1546
1547 if (value & TSL2X7X_STA_ALS_INTR) {
1548 tsl2x7x_get_lux(indio_dev); /* freshen data for ABI */
1549 iio_push_event(indio_dev,
1550 IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
1551 0,
1552 IIO_EV_TYPE_THRESH,
1553 IIO_EV_DIR_EITHER),
1554 timestamp);
1555 }
1556 /* Clear interrupt now that we have handled it. */
1557 ret = i2c_smbus_write_byte(chip->client,
1558 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
1559 TSL2X7X_CMD_PROXALS_INT_CLR);
1560 if (ret < 0)
1561 dev_err(&chip->client->dev,
1562 "%s: Failed to clear irq from event handler. err = %d\n",
1563 __func__, ret);
1564
1565 return IRQ_HANDLED;
1566 }
1567
1568 static struct attribute *tsl2x7x_ALS_device_attrs[] = {
1569 &dev_attr_power_state.attr,
1570 &dev_attr_in_illuminance0_calibscale_available.attr,
1571 &dev_attr_in_illuminance0_integration_time.attr,
1572 &iio_const_attr_in_illuminance0_integration_time_available\
1573 .dev_attr.attr,
1574 &dev_attr_in_illuminance0_target_input.attr,
1575 &dev_attr_in_illuminance0_calibrate.attr,
1576 &dev_attr_in_illuminance0_lux_table.attr,
1577 NULL
1578 };
1579
1580 static struct attribute *tsl2x7x_PRX_device_attrs[] = {
1581 &dev_attr_power_state.attr,
1582 &dev_attr_in_proximity0_calibrate.attr,
1583 NULL
1584 };
1585
1586 static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
1587 &dev_attr_power_state.attr,
1588 &dev_attr_in_illuminance0_calibscale_available.attr,
1589 &dev_attr_in_illuminance0_integration_time.attr,
1590 &iio_const_attr_in_illuminance0_integration_time_available\
1591 .dev_attr.attr,
1592 &dev_attr_in_illuminance0_target_input.attr,
1593 &dev_attr_in_illuminance0_calibrate.attr,
1594 &dev_attr_in_illuminance0_lux_table.attr,
1595 &dev_attr_in_proximity0_calibrate.attr,
1596 NULL
1597 };
1598
1599 static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
1600 &dev_attr_power_state.attr,
1601 &dev_attr_in_proximity0_calibrate.attr,
1602 &dev_attr_in_proximity0_calibscale_available.attr,
1603 NULL
1604 };
1605
1606 static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
1607 &dev_attr_power_state.attr,
1608 &dev_attr_in_illuminance0_calibscale_available.attr,
1609 &dev_attr_in_illuminance0_integration_time.attr,
1610 &iio_const_attr_in_illuminance0_integration_time_available\
1611 .dev_attr.attr,
1612 &dev_attr_in_illuminance0_target_input.attr,
1613 &dev_attr_in_illuminance0_calibrate.attr,
1614 &dev_attr_in_illuminance0_lux_table.attr,
1615 &dev_attr_in_proximity0_calibrate.attr,
1616 &dev_attr_in_proximity0_calibscale_available.attr,
1617 NULL
1618 };
1619
1620 static struct attribute *tsl2X7X_ALS_event_attrs[] = {
1621 &dev_attr_in_intensity0_thresh_period.attr,
1622 NULL,
1623 };
1624 static struct attribute *tsl2X7X_PRX_event_attrs[] = {
1625 &dev_attr_in_proximity0_thresh_period.attr,
1626 NULL,
1627 };
1628
1629 static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
1630 &dev_attr_in_intensity0_thresh_period.attr,
1631 &dev_attr_in_proximity0_thresh_period.attr,
1632 NULL,
1633 };
1634
1635 static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
1636 [ALS] = {
1637 .attrs = tsl2x7x_ALS_device_attrs,
1638 },
1639 [PRX] = {
1640 .attrs = tsl2x7x_PRX_device_attrs,
1641 },
1642 [ALSPRX] = {
1643 .attrs = tsl2x7x_ALSPRX_device_attrs,
1644 },
1645 [PRX2] = {
1646 .attrs = tsl2x7x_PRX2_device_attrs,
1647 },
1648 [ALSPRX2] = {
1649 .attrs = tsl2x7x_ALSPRX2_device_attrs,
1650 },
1651 };
1652
1653 static struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
1654 [ALS] = {
1655 .attrs = tsl2X7X_ALS_event_attrs,
1656 .name = "events",
1657 },
1658 [PRX] = {
1659 .attrs = tsl2X7X_PRX_event_attrs,
1660 .name = "events",
1661 },
1662 [ALSPRX] = {
1663 .attrs = tsl2X7X_ALSPRX_event_attrs,
1664 .name = "events",
1665 },
1666 };
1667
1668 static const struct iio_info tsl2X7X_device_info[] = {
1669 [ALS] = {
1670 .attrs = &tsl2X7X_device_attr_group_tbl[ALS],
1671 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALS],
1672 .driver_module = THIS_MODULE,
1673 .read_raw = &tsl2x7x_read_raw,
1674 .write_raw = &tsl2x7x_write_raw,
1675 .read_event_value = &tsl2x7x_read_thresh,
1676 .write_event_value = &tsl2x7x_write_thresh,
1677 .read_event_config = &tsl2x7x_read_interrupt_config,
1678 .write_event_config = &tsl2x7x_write_interrupt_config,
1679 },
1680 [PRX] = {
1681 .attrs = &tsl2X7X_device_attr_group_tbl[PRX],
1682 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1683 .driver_module = THIS_MODULE,
1684 .read_raw = &tsl2x7x_read_raw,
1685 .write_raw = &tsl2x7x_write_raw,
1686 .read_event_value = &tsl2x7x_read_thresh,
1687 .write_event_value = &tsl2x7x_write_thresh,
1688 .read_event_config = &tsl2x7x_read_interrupt_config,
1689 .write_event_config = &tsl2x7x_write_interrupt_config,
1690 },
1691 [ALSPRX] = {
1692 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
1693 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1694 .driver_module = THIS_MODULE,
1695 .read_raw = &tsl2x7x_read_raw,
1696 .write_raw = &tsl2x7x_write_raw,
1697 .read_event_value = &tsl2x7x_read_thresh,
1698 .write_event_value = &tsl2x7x_write_thresh,
1699 .read_event_config = &tsl2x7x_read_interrupt_config,
1700 .write_event_config = &tsl2x7x_write_interrupt_config,
1701 },
1702 [PRX2] = {
1703 .attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
1704 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1705 .driver_module = THIS_MODULE,
1706 .read_raw = &tsl2x7x_read_raw,
1707 .write_raw = &tsl2x7x_write_raw,
1708 .read_event_value = &tsl2x7x_read_thresh,
1709 .write_event_value = &tsl2x7x_write_thresh,
1710 .read_event_config = &tsl2x7x_read_interrupt_config,
1711 .write_event_config = &tsl2x7x_write_interrupt_config,
1712 },
1713 [ALSPRX2] = {
1714 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
1715 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1716 .driver_module = THIS_MODULE,
1717 .read_raw = &tsl2x7x_read_raw,
1718 .write_raw = &tsl2x7x_write_raw,
1719 .read_event_value = &tsl2x7x_read_thresh,
1720 .write_event_value = &tsl2x7x_write_thresh,
1721 .read_event_config = &tsl2x7x_read_interrupt_config,
1722 .write_event_config = &tsl2x7x_write_interrupt_config,
1723 },
1724 };
1725
1726 static const struct iio_event_spec tsl2x7x_events[] = {
1727 {
1728 .type = IIO_EV_TYPE_THRESH,
1729 .dir = IIO_EV_DIR_RISING,
1730 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1731 BIT(IIO_EV_INFO_ENABLE),
1732 }, {
1733 .type = IIO_EV_TYPE_THRESH,
1734 .dir = IIO_EV_DIR_FALLING,
1735 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1736 BIT(IIO_EV_INFO_ENABLE),
1737 },
1738 };
1739
1740 static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
1741 [ALS] = {
1742 .channel = {
1743 {
1744 .type = IIO_LIGHT,
1745 .indexed = 1,
1746 .channel = 0,
1747 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1748 }, {
1749 .type = IIO_INTENSITY,
1750 .indexed = 1,
1751 .channel = 0,
1752 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1753 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1754 BIT(IIO_CHAN_INFO_CALIBBIAS),
1755 .event_spec = tsl2x7x_events,
1756 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1757 }, {
1758 .type = IIO_INTENSITY,
1759 .indexed = 1,
1760 .channel = 1,
1761 },
1762 },
1763 .chan_table_elements = 3,
1764 .info = &tsl2X7X_device_info[ALS],
1765 },
1766 [PRX] = {
1767 .channel = {
1768 {
1769 .type = IIO_PROXIMITY,
1770 .indexed = 1,
1771 .channel = 0,
1772 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1773 .event_spec = tsl2x7x_events,
1774 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1775 },
1776 },
1777 .chan_table_elements = 1,
1778 .info = &tsl2X7X_device_info[PRX],
1779 },
1780 [ALSPRX] = {
1781 .channel = {
1782 {
1783 .type = IIO_LIGHT,
1784 .indexed = 1,
1785 .channel = 0,
1786 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED)
1787 }, {
1788 .type = IIO_INTENSITY,
1789 .indexed = 1,
1790 .channel = 0,
1791 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1792 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1793 BIT(IIO_CHAN_INFO_CALIBBIAS),
1794 .event_spec = tsl2x7x_events,
1795 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1796 }, {
1797 .type = IIO_INTENSITY,
1798 .indexed = 1,
1799 .channel = 1,
1800 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1801 }, {
1802 .type = IIO_PROXIMITY,
1803 .indexed = 1,
1804 .channel = 0,
1805 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1806 .event_spec = tsl2x7x_events,
1807 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1808 },
1809 },
1810 .chan_table_elements = 4,
1811 .info = &tsl2X7X_device_info[ALSPRX],
1812 },
1813 [PRX2] = {
1814 .channel = {
1815 {
1816 .type = IIO_PROXIMITY,
1817 .indexed = 1,
1818 .channel = 0,
1819 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1820 BIT(IIO_CHAN_INFO_CALIBSCALE),
1821 .event_spec = tsl2x7x_events,
1822 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1823 },
1824 },
1825 .chan_table_elements = 1,
1826 .info = &tsl2X7X_device_info[PRX2],
1827 },
1828 [ALSPRX2] = {
1829 .channel = {
1830 {
1831 .type = IIO_LIGHT,
1832 .indexed = 1,
1833 .channel = 0,
1834 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1835 }, {
1836 .type = IIO_INTENSITY,
1837 .indexed = 1,
1838 .channel = 0,
1839 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1840 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1841 BIT(IIO_CHAN_INFO_CALIBBIAS),
1842 .event_spec = tsl2x7x_events,
1843 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1844 }, {
1845 .type = IIO_INTENSITY,
1846 .indexed = 1,
1847 .channel = 1,
1848 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1849 }, {
1850 .type = IIO_PROXIMITY,
1851 .indexed = 1,
1852 .channel = 0,
1853 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1854 BIT(IIO_CHAN_INFO_CALIBSCALE),
1855 .event_spec = tsl2x7x_events,
1856 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1857 },
1858 },
1859 .chan_table_elements = 4,
1860 .info = &tsl2X7X_device_info[ALSPRX2],
1861 },
1862 };
1863
1864 static int tsl2x7x_probe(struct i2c_client *clientp,
1865 const struct i2c_device_id *id)
1866 {
1867 int ret;
1868 unsigned char device_id;
1869 struct iio_dev *indio_dev;
1870 struct tsl2X7X_chip *chip;
1871
1872 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
1873 if (!indio_dev)
1874 return -ENOMEM;
1875
1876 chip = iio_priv(indio_dev);
1877 chip->client = clientp;
1878 i2c_set_clientdata(clientp, indio_dev);
1879
1880 ret = tsl2x7x_i2c_read(chip->client,
1881 TSL2X7X_CHIPID, &device_id);
1882 if (ret < 0)
1883 return ret;
1884
1885 if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
1886 (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
1887 dev_info(&chip->client->dev,
1888 "%s: i2c device found does not match expected id\n",
1889 __func__);
1890 return -EINVAL;
1891 }
1892
1893 ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
1894 if (ret < 0) {
1895 dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n",
1896 __func__, ret);
1897 return ret;
1898 }
1899
1900 /* ALS and PROX functions can be invoked via user space poll
1901 * or H/W interrupt. If busy return last sample. */
1902 mutex_init(&chip->als_mutex);
1903 mutex_init(&chip->prox_mutex);
1904
1905 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
1906 chip->pdata = clientp->dev.platform_data;
1907 chip->id = id->driver_data;
1908 chip->chip_info =
1909 &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
1910
1911 indio_dev->info = chip->chip_info->info;
1912 indio_dev->dev.parent = &clientp->dev;
1913 indio_dev->modes = INDIO_DIRECT_MODE;
1914 indio_dev->name = chip->client->name;
1915 indio_dev->channels = chip->chip_info->channel;
1916 indio_dev->num_channels = chip->chip_info->chan_table_elements;
1917
1918 if (clientp->irq) {
1919 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq,
1920 NULL,
1921 &tsl2x7x_event_handler,
1922 IRQF_TRIGGER_RISING |
1923 IRQF_ONESHOT,
1924 "TSL2X7X_event",
1925 indio_dev);
1926 if (ret) {
1927 dev_err(&clientp->dev,
1928 "%s: irq request failed", __func__);
1929 return ret;
1930 }
1931 }
1932
1933 /* Load up the defaults */
1934 tsl2x7x_defaults(chip);
1935 /* Make sure the chip is on */
1936 tsl2x7x_chip_on(indio_dev);
1937
1938 ret = iio_device_register(indio_dev);
1939 if (ret) {
1940 dev_err(&clientp->dev,
1941 "%s: iio registration failed\n", __func__);
1942 return ret;
1943 }
1944
1945 dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
1946
1947 return 0;
1948 }
1949
1950 static int tsl2x7x_suspend(struct device *dev)
1951 {
1952 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1953 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1954 int ret = 0;
1955
1956 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
1957 ret = tsl2x7x_chip_off(indio_dev);
1958 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
1959 }
1960
1961 if (chip->pdata && chip->pdata->platform_power) {
1962 pm_message_t pmm = {PM_EVENT_SUSPEND};
1963 chip->pdata->platform_power(dev, pmm);
1964 }
1965
1966 return ret;
1967 }
1968
1969 static int tsl2x7x_resume(struct device *dev)
1970 {
1971 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1972 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1973 int ret = 0;
1974
1975 if (chip->pdata && chip->pdata->platform_power) {
1976 pm_message_t pmm = {PM_EVENT_RESUME};
1977 chip->pdata->platform_power(dev, pmm);
1978 }
1979
1980 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
1981 ret = tsl2x7x_chip_on(indio_dev);
1982
1983 return ret;
1984 }
1985
1986 static int tsl2x7x_remove(struct i2c_client *client)
1987 {
1988 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1989
1990 tsl2x7x_chip_off(indio_dev);
1991
1992 iio_device_unregister(indio_dev);
1993
1994 return 0;
1995 }
1996
1997 static struct i2c_device_id tsl2x7x_idtable[] = {
1998 { "tsl2571", tsl2571 },
1999 { "tsl2671", tsl2671 },
2000 { "tmd2671", tmd2671 },
2001 { "tsl2771", tsl2771 },
2002 { "tmd2771", tmd2771 },
2003 { "tsl2572", tsl2572 },
2004 { "tsl2672", tsl2672 },
2005 { "tmd2672", tmd2672 },
2006 { "tsl2772", tsl2772 },
2007 { "tmd2772", tmd2772 },
2008 {}
2009 };
2010
2011 MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
2012
2013 static const struct dev_pm_ops tsl2x7x_pm_ops = {
2014 .suspend = tsl2x7x_suspend,
2015 .resume = tsl2x7x_resume,
2016 };
2017
2018 /* Driver definition */
2019 static struct i2c_driver tsl2x7x_driver = {
2020 .driver = {
2021 .name = "tsl2x7x",
2022 .pm = &tsl2x7x_pm_ops,
2023 },
2024 .id_table = tsl2x7x_idtable,
2025 .probe = tsl2x7x_probe,
2026 .remove = tsl2x7x_remove,
2027 };
2028
2029 module_i2c_driver(tsl2x7x_driver);
2030
2031 MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
2032 MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
2033 MODULE_LICENSE("GPL");
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