2 * Device driver for monitoring ambient light intensity in (lux)
3 * and proximity detection (prox) within the TAOS TSL2X7X family of devices.
5 * Copyright (c) 2012, TAOS Corporation.
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.
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
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.
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>
36 #define PROX_STAT_CAL 0
37 #define PROX_STAT_SAMP 1
38 #define MAX_SAMPLES_CAL 200
40 /* TSL2X7X Device ID */
41 #define TRITON_ID 0x00
42 #define SWORDFISH_ID 0x30
43 #define HALIBUT_ID 0x20
45 /* Lux calculation constants */
46 #define TSL2X7X_LUX_CALC_OVER_FLOW 65535
48 /* TAOS Register definitions - note:
49 * depending on device, some of these register are not used and the
50 * register address is benign.
52 /* 2X7X register offsets */
53 #define TSL2X7X_MAX_CONFIG_REG 16
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
83 /* tsl2X7X cmd reg masks */
84 #define TSL2X7X_CMD_REG 0x80
85 #define TSL2X7X_CMD_SPL_FN 0x60
87 #define TSL2X7X_CMD_PROX_INT_CLR 0X05
88 #define TSL2X7X_CMD_ALS_INT_CLR 0x06
89 #define TSL2X7X_CMD_PROXALS_INT_CLR 0X07
91 /* tsl2X7X cntrl reg masks */
92 #define TSL2X7X_CNTL_ADC_ENBL 0x02
93 #define TSL2X7X_CNTL_PWR_ON 0x01
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
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
115 /*Prox diode to use */
116 #define TSL2X7X_DIODE0 0x10
117 #define TSL2X7X_DIODE1 0x20
118 #define TSL2X7X_DIODE_BOTH 0x30
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)
127 #define TSL2X7X_MIN_ITIME 3
129 /* TAOS txx2x7x Device family members */
144 TSL2X7X_CHIP_UNKNOWN = 0,
145 TSL2X7X_CHIP_WORKING = 1,
146 TSL2X7X_CHIP_SUSPENDED = 2
149 struct tsl2x7x_parse_result {
154 /* Per-device data */
155 struct tsl2x7x_als_info {
161 struct tsl2x7x_prox_stat {
165 unsigned long stddev;
168 struct tsl2x7x_chip_info {
169 int chan_table_elements;
170 struct iio_chan_spec channel[4];
171 const struct iio_info *info;
174 struct tsl2X7X_chip {
176 struct mutex prox_mutex;
177 struct mutex als_mutex;
178 struct i2c_client *client;
180 struct tsl2x7x_als_info als_cur_info;
181 struct tsl2x7x_settings tsl2x7x_settings;
182 struct tsl2X7X_platform_data *pdata;
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;
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];
196 /* Different devices require different coefficents */
197 static const struct tsl2x7x_lux tsl2x71_lux_table[] = {
198 { 14461, 611, 1211 },
203 static const struct tsl2x7x_lux tmd2x71_lux_table[] = {
209 static const struct tsl2x7x_lux tsl2x72_lux_table[] = {
215 static const struct tsl2x7x_lux tmd2x72_lux_table[] = {
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,
234 static const struct tsl2x7x_settings tsl2x7x_default_settings = {
235 .als_time = 219, /* 101 ms */
237 .prx_time = 254, /* 5.4 ms */
241 .als_gain_trim = 1000,
242 .als_cal_target = 150,
243 .als_thresh_low = 200,
244 .als_thresh_high = 256,
248 .prox_thres_high = 512,
249 .prox_max_samples_cal = 30,
250 .prox_pulse_count = 8
253 static const s16 tsl2X7X_als_gainadj[] = {
260 static const s16 tsl2X7X_prx_gainadj[] = {
267 /* Channel variations */
276 static const u8 device_channel_config[] = {
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.
297 tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
301 /* select register to write */
302 ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
304 dev_err(&client->dev, "failed to write register %x\n", reg);
309 ret = i2c_smbus_read_byte(client);
313 dev_err(&client->dev, "failed to read register %x\n", reg);
319 * tsl2x7x_get_lux() - Reads and calculates current lux value.
320 * @indio_dev: pointer to IIO device
322 * The raw ch0 and ch1 values of the ambient light sensed in the last
323 * integration cycle are read from the device.
324 * Time scale factor array values are adjusted based on the integration time.
325 * The raw values are multiplied by a scale factor, and device gain is obtained
326 * using gain index. Limit checks are done next, then the ratio of a multiple
327 * of ch1 value, to the ch0 value, is calculated. Array tsl2x7x_device_lux[]
328 * is then scanned to find the first ratio value that is just above the ratio
329 * we just calculated. The ch0 and ch1 multiplier constants in the array are
330 * then used along with the time scale factor array values, to calculate the
333 static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
335 u16 ch0, ch1; /* separated ch0/ch1 data from device */
336 u32 lux; /* raw lux calculated from device data */
340 struct tsl2x7x_lux *p;
341 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
346 if (mutex_trylock(&chip->als_mutex) == 0)
347 return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
349 if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
350 /* device is not enabled */
351 dev_err(&chip->client->dev, "%s: device is not enabled\n",
357 ret = tsl2x7x_i2c_read(chip->client,
358 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
360 dev_err(&chip->client->dev,
361 "%s: Failed to read STATUS Reg\n", __func__);
364 /* is data new & valid */
365 if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
366 dev_err(&chip->client->dev,
367 "%s: data not valid yet\n", __func__);
368 ret = chip->als_cur_info.lux; /* return LAST VALUE */
372 for (i = 0; i < 4; i++) {
373 ret = tsl2x7x_i2c_read(chip->client,
374 (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
377 dev_err(&chip->client->dev,
378 "failed to read. err=%x\n", ret);
383 /* clear any existing interrupt status */
384 ret = i2c_smbus_write_byte(chip->client,
387 TSL2X7X_CMD_ALS_INT_CLR));
389 dev_err(&chip->client->dev,
390 "i2c_write_command failed - err = %d\n", ret);
391 goto out_unlock; /* have no data, so return failure */
394 /* extract ALS/lux data */
395 ch0 = le16_to_cpup((const __le16 *)&buf[0]);
396 ch1 = le16_to_cpup((const __le16 *)&buf[2]);
398 chip->als_cur_info.als_ch0 = ch0;
399 chip->als_cur_info.als_ch1 = ch1;
401 if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) {
402 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
407 /* have no data, so return LAST VALUE */
408 ret = chip->als_cur_info.lux;
411 /* calculate ratio */
412 ratio = (ch1 << 15) / ch0;
413 /* convert to unscaled lux using the pointer to the table */
414 p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
415 while (p->ratio != 0 && p->ratio < ratio)
421 ch0lux = DIV_ROUND_UP(ch0 * p->ch0,
422 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
423 ch1lux = DIV_ROUND_UP(ch1 * p->ch1,
424 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
425 lux = ch0lux - ch1lux;
428 /* note: lux is 31 bit max at this point */
429 if (ch1lux > ch0lux) {
430 dev_dbg(&chip->client->dev, "ch1lux > ch0lux-return last value\n");
431 ret = chip->als_cur_info.lux;
435 /* adjust for active time scale */
436 if (chip->als_time_scale == 0)
439 lux = (lux + (chip->als_time_scale >> 1)) /
440 chip->als_time_scale;
442 /* adjust for active gain scale
443 * The tsl2x7x_device_lux tables have a factor of 256 built-in.
444 * User-specified gain provides a multiplier.
445 * Apply user-specified gain before shifting right to retain precision.
446 * Use 64 bits to avoid overflow on multiplication.
447 * Then go back to 32 bits before division to avoid using div_u64().
451 lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
454 lux = (lux + 500) / 1000;
456 if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */
457 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
459 /* Update the structure with the latest lux. */
461 chip->als_cur_info.lux = lux;
465 mutex_unlock(&chip->als_mutex);
471 * tsl2x7x_get_prox() - Reads proximity data registers and updates
474 * @indio_dev: pointer to IIO device
476 static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
482 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
484 if (mutex_trylock(&chip->prox_mutex) == 0) {
485 dev_err(&chip->client->dev,
486 "%s: Can't get prox mutex\n", __func__);
490 ret = tsl2x7x_i2c_read(chip->client,
491 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
493 dev_err(&chip->client->dev, "i2c err=%d\n", ret);
503 if (!(status & TSL2X7X_STA_ADC_VALID))
511 if (!(status & TSL2X7X_STA_PRX_VALID))
516 for (i = 0; i < 2; i++) {
517 ret = tsl2x7x_i2c_read(chip->client,
519 (TSL2X7X_PRX_LO + i)), &chdata[i]);
525 le16_to_cpup((const __le16 *)&chdata[0]);
529 mutex_unlock(&chip->prox_mutex);
531 return chip->prox_data;
535 * tsl2x7x_defaults() - Populates the device nominal operating parameters
536 * with those provided by a 'platform' data struct or
537 * with prefined defaults.
539 * @chip: pointer to device structure.
541 static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
543 /* If Operational settings defined elsewhere.. */
544 if (chip->pdata && chip->pdata->platform_default_settings)
545 memcpy(&(chip->tsl2x7x_settings),
546 chip->pdata->platform_default_settings,
547 sizeof(tsl2x7x_default_settings));
549 memcpy(&(chip->tsl2x7x_settings),
550 &tsl2x7x_default_settings,
551 sizeof(tsl2x7x_default_settings));
553 /* Load up the proper lux table. */
554 if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0)
555 memcpy(chip->tsl2x7x_device_lux,
556 chip->pdata->platform_lux_table,
557 sizeof(chip->pdata->platform_lux_table));
559 memcpy(chip->tsl2x7x_device_lux,
560 (struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
561 MAX_DEFAULT_TABLE_BYTES);
565 * tsl2x7x_als_calibrate() - Obtain single reading and calculate
568 * @indio_dev: pointer to IIO device
570 static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
572 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
578 ret = i2c_smbus_write_byte(chip->client,
579 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
581 dev_err(&chip->client->dev,
582 "failed to write CNTRL register, ret=%d\n", ret);
586 reg_val = i2c_smbus_read_byte(chip->client);
587 if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
588 != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
589 dev_err(&chip->client->dev,
590 "%s: failed: ADC not enabled\n", __func__);
594 ret = i2c_smbus_write_byte(chip->client,
595 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
597 dev_err(&chip->client->dev,
598 "failed to write ctrl reg: ret=%d\n", ret);
602 reg_val = i2c_smbus_read_byte(chip->client);
603 if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
604 dev_err(&chip->client->dev,
605 "%s: failed: STATUS - ADC not valid.\n", __func__);
609 lux_val = tsl2x7x_get_lux(indio_dev);
611 dev_err(&chip->client->dev,
612 "%s: failed to get lux\n", __func__);
616 gain_trim_val = ((chip->tsl2x7x_settings.als_cal_target)
617 * chip->tsl2x7x_settings.als_gain_trim) / lux_val;
618 if ((gain_trim_val < 250) || (gain_trim_val > 4000))
621 chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
622 dev_info(&chip->client->dev,
623 "%s als_calibrate completed\n", chip->client->name);
625 return (int) gain_trim_val;
628 static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
636 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
639 if (chip->pdata && chip->pdata->power_on)
640 chip->pdata->power_on(indio_dev);
642 /* Non calculated parameters */
643 chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
644 chip->tsl2x7x_settings.prx_time;
645 chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
646 chip->tsl2x7x_settings.wait_time;
647 chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
648 chip->tsl2x7x_settings.prox_config;
650 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
651 (chip->tsl2x7x_settings.als_thresh_low) & 0xFF;
652 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
653 (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF;
654 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
655 (chip->tsl2x7x_settings.als_thresh_high) & 0xFF;
656 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
657 (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF;
658 chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
659 chip->tsl2x7x_settings.persistence;
661 chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
662 chip->tsl2x7x_settings.prox_pulse_count;
663 chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
664 (chip->tsl2x7x_settings.prox_thres_low) & 0xFF;
665 chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHHI] =
666 (chip->tsl2x7x_settings.prox_thres_low >> 8) & 0xFF;
667 chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
668 (chip->tsl2x7x_settings.prox_thres_high) & 0xFF;
669 chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHHI] =
670 (chip->tsl2x7x_settings.prox_thres_high >> 8) & 0xFF;
672 /* and make sure we're not already on */
673 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
674 /* if forcing a register update - turn off, then on */
675 dev_info(&chip->client->dev, "device is already enabled\n");
679 /* determine als integration register */
680 als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
682 als_count = 1; /* ensure at least one cycle */
684 /* convert back to time (encompasses overrides) */
685 als_time = (als_count * 27 + 5) / 10;
686 chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
688 /* Set the gain based on tsl2x7x_settings struct */
689 chip->tsl2x7x_config[TSL2X7X_GAIN] =
690 (chip->tsl2x7x_settings.als_gain |
691 (TSL2X7X_mA100 | TSL2X7X_DIODE1)
692 | ((chip->tsl2x7x_settings.prox_gain) << 2));
694 /* set chip struct re scaling and saturation */
695 chip->als_saturation = als_count * 922; /* 90% of full scale */
696 chip->als_time_scale = (als_time + 25) / 50;
698 /* TSL2X7X Specific power-on / adc enable sequence
699 * Power on the device 1st. */
700 utmp = TSL2X7X_CNTL_PWR_ON;
701 ret = i2c_smbus_write_byte_data(chip->client,
702 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
704 dev_err(&chip->client->dev,
705 "%s: failed on CNTRL reg.\n", __func__);
709 /* Use the following shadow copy for our delay before enabling ADC.
710 * Write all the registers. */
711 for (i = 0, dev_reg = chip->tsl2x7x_config;
712 i < TSL2X7X_MAX_CONFIG_REG; i++) {
713 ret = i2c_smbus_write_byte_data(chip->client,
714 TSL2X7X_CMD_REG + i, *dev_reg++);
716 dev_err(&chip->client->dev,
717 "failed on write to reg %d.\n", i);
722 mdelay(3); /* Power-on settling time */
724 /* NOW enable the ADC
725 * initialize the desired mode of operation */
726 utmp = TSL2X7X_CNTL_PWR_ON |
727 TSL2X7X_CNTL_ADC_ENBL |
728 TSL2X7X_CNTL_PROX_DET_ENBL;
729 ret = i2c_smbus_write_byte_data(chip->client,
730 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
732 dev_err(&chip->client->dev,
733 "%s: failed on 2nd CTRL reg.\n", __func__);
737 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
739 if (chip->tsl2x7x_settings.interrupts_en != 0) {
740 dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
742 reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
743 if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
744 (chip->tsl2x7x_settings.interrupts_en == 0x30))
745 reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
747 reg_val |= chip->tsl2x7x_settings.interrupts_en;
748 ret = i2c_smbus_write_byte_data(chip->client,
749 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
751 dev_err(&chip->client->dev,
752 "%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
755 /* Clear out any initial interrupts */
756 ret = i2c_smbus_write_byte(chip->client,
757 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
758 TSL2X7X_CMD_PROXALS_INT_CLR);
760 dev_err(&chip->client->dev,
761 "%s: Failed to clear Int status\n",
770 static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
773 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
775 /* turn device off */
776 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
778 ret = i2c_smbus_write_byte_data(chip->client,
779 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
781 if (chip->pdata && chip->pdata->power_off)
782 chip->pdata->power_off(chip->client);
788 * tsl2x7x_invoke_change
789 * @indio_dev: pointer to IIO device
791 * Obtain and lock both ALS and PROX resources,
792 * determine and save device state (On/Off),
793 * cycle device to implement updated parameter,
794 * put device back into proper state, and unlock
798 int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
800 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
801 int device_status = chip->tsl2x7x_chip_status;
803 mutex_lock(&chip->als_mutex);
804 mutex_lock(&chip->prox_mutex);
806 if (device_status == TSL2X7X_CHIP_WORKING)
807 tsl2x7x_chip_off(indio_dev);
809 tsl2x7x_chip_on(indio_dev);
811 if (device_status != TSL2X7X_CHIP_WORKING)
812 tsl2x7x_chip_off(indio_dev);
814 mutex_unlock(&chip->prox_mutex);
815 mutex_unlock(&chip->als_mutex);
821 void tsl2x7x_prox_calculate(int *data, int length,
822 struct tsl2x7x_prox_stat *statP)
832 statP->min = INT_MAX;
833 statP->max = INT_MIN;
834 for (i = 0; i < length; i++) {
835 sample_sum += data[i];
836 statP->min = min(statP->min, data[i]);
837 statP->max = max(statP->max, data[i]);
840 statP->mean = sample_sum / length;
842 for (i = 0; i < length; i++) {
843 tmp = data[i] - statP->mean;
844 sample_sum += tmp * tmp;
846 statP->stddev = int_sqrt((long)sample_sum)/length;
850 * tsl2x7x_prox_cal() - Calculates std. and sets thresholds.
851 * @indio_dev: pointer to IIO device
853 * Calculates a standard deviation based on the samples,
854 * and sets the threshold accordingly.
856 static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
858 int prox_history[MAX_SAMPLES_CAL + 1];
860 struct tsl2x7x_prox_stat prox_stat_data[2];
861 struct tsl2x7x_prox_stat *calP;
862 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
864 u8 current_state = chip->tsl2x7x_chip_status;
866 if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) {
867 dev_err(&chip->client->dev,
868 "max prox samples cal is too big: %d\n",
869 chip->tsl2x7x_settings.prox_max_samples_cal);
870 chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
873 /* have to stop to change settings */
874 tsl2x7x_chip_off(indio_dev);
876 /* Enable proximity detection save just in case prox not wanted yet*/
877 tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
878 chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL;
880 /*turn on device if not already on*/
881 tsl2x7x_chip_on(indio_dev);
883 /*gather the samples*/
884 for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
886 tsl2x7x_get_prox(indio_dev);
887 prox_history[i] = chip->prox_data;
888 dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
892 tsl2x7x_chip_off(indio_dev);
893 calP = &prox_stat_data[PROX_STAT_CAL];
894 tsl2x7x_prox_calculate(prox_history,
895 chip->tsl2x7x_settings.prox_max_samples_cal, calP);
896 chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean;
898 dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
899 calP->min, calP->mean, calP->max);
900 dev_info(&chip->client->dev,
901 "%s proximity threshold set to %d\n",
902 chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
904 /* back to the way they were */
905 chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
906 if (current_state == TSL2X7X_CHIP_WORKING)
907 tsl2x7x_chip_on(indio_dev);
910 static ssize_t tsl2x7x_power_state_show(struct device *dev,
911 struct device_attribute *attr, char *buf)
913 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
915 return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
918 static ssize_t tsl2x7x_power_state_store(struct device *dev,
919 struct device_attribute *attr, const char *buf, size_t len)
921 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
924 if (strtobool(buf, &value))
928 tsl2x7x_chip_on(indio_dev);
930 tsl2x7x_chip_off(indio_dev);
935 static ssize_t tsl2x7x_gain_available_show(struct device *dev,
936 struct device_attribute *attr, char *buf)
938 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
946 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
949 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
952 static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev,
953 struct device_attribute *attr, char *buf)
955 return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
958 static ssize_t tsl2x7x_als_time_show(struct device *dev,
959 struct device_attribute *attr, char *buf)
961 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
964 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
965 z = y * TSL2X7X_MIN_ITIME;
969 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
972 static ssize_t tsl2x7x_als_time_store(struct device *dev,
973 struct device_attribute *attr, const char *buf, size_t len)
975 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
976 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
977 struct tsl2x7x_parse_result result;
980 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
985 chip->tsl2x7x_settings.als_time =
986 (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract);
988 dev_info(&chip->client->dev, "%s: als time = %d",
989 __func__, chip->tsl2x7x_settings.als_time);
991 tsl2x7x_invoke_change(indio_dev);
993 return IIO_VAL_INT_PLUS_MICRO;
996 static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
999 static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
1000 struct device_attribute *attr, char *buf)
1002 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1004 return snprintf(buf, PAGE_SIZE, "%d\n",
1005 chip->tsl2x7x_settings.als_cal_target);
1008 static ssize_t tsl2x7x_als_cal_target_store(struct device *dev,
1009 struct device_attribute *attr, const char *buf, size_t len)
1011 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1012 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1013 unsigned long value;
1015 if (kstrtoul(buf, 0, &value))
1019 chip->tsl2x7x_settings.als_cal_target = value;
1021 tsl2x7x_invoke_change(indio_dev);
1026 /* persistence settings */
1027 static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
1028 struct device_attribute *attr, char *buf)
1030 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1031 int y, z, filter_delay;
1033 /* Determine integration time */
1034 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1035 z = y * TSL2X7X_MIN_ITIME;
1036 filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F);
1037 y = filter_delay / 1000;
1038 z = filter_delay % 1000;
1040 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1043 static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
1044 struct device_attribute *attr, const char *buf, size_t len)
1046 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1047 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1048 struct tsl2x7x_parse_result result;
1049 int y, z, filter_delay;
1052 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
1056 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1057 z = y * TSL2X7X_MIN_ITIME;
1060 DIV_ROUND_UP((result.integer * 1000) + result.fract, z);
1062 chip->tsl2x7x_settings.persistence &= 0xF0;
1063 chip->tsl2x7x_settings.persistence |= (filter_delay & 0x0F);
1065 dev_info(&chip->client->dev, "%s: als persistence = %d",
1066 __func__, filter_delay);
1068 tsl2x7x_invoke_change(indio_dev);
1070 return IIO_VAL_INT_PLUS_MICRO;
1073 static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
1074 struct device_attribute *attr, char *buf)
1076 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1077 int y, z, filter_delay;
1079 /* Determine integration time */
1080 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1081 z = y * TSL2X7X_MIN_ITIME;
1082 filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4);
1083 y = filter_delay / 1000;
1084 z = filter_delay % 1000;
1086 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1089 static ssize_t tsl2x7x_prox_persistence_store(struct device *dev,
1090 struct device_attribute *attr, const char *buf, size_t len)
1092 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1093 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1094 struct tsl2x7x_parse_result result;
1095 int y, z, filter_delay;
1098 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
1102 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1103 z = y * TSL2X7X_MIN_ITIME;
1106 DIV_ROUND_UP((result.integer * 1000) + result.fract, z);
1108 chip->tsl2x7x_settings.persistence &= 0x0F;
1109 chip->tsl2x7x_settings.persistence |= ((filter_delay << 4) & 0xF0);
1111 dev_info(&chip->client->dev, "%s: prox persistence = %d",
1112 __func__, filter_delay);
1114 tsl2x7x_invoke_change(indio_dev);
1116 return IIO_VAL_INT_PLUS_MICRO;
1119 static ssize_t tsl2x7x_do_calibrate(struct device *dev,
1120 struct device_attribute *attr, const char *buf, size_t len)
1122 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1125 if (strtobool(buf, &value))
1129 tsl2x7x_als_calibrate(indio_dev);
1131 tsl2x7x_invoke_change(indio_dev);
1136 static ssize_t tsl2x7x_luxtable_show(struct device *dev,
1137 struct device_attribute *attr, char *buf)
1139 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1143 while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) {
1144 offset += snprintf(buf + offset, PAGE_SIZE, "%u,%u,%u,",
1145 chip->tsl2x7x_device_lux[i].ratio,
1146 chip->tsl2x7x_device_lux[i].ch0,
1147 chip->tsl2x7x_device_lux[i].ch1);
1148 if (chip->tsl2x7x_device_lux[i].ratio == 0) {
1149 /* We just printed the first "0" entry.
1150 * Now get rid of the extra "," and break. */
1157 offset += snprintf(buf + offset, PAGE_SIZE, "\n");
1161 static ssize_t tsl2x7x_luxtable_store(struct device *dev,
1162 struct device_attribute *attr, const char *buf, size_t len)
1164 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1165 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1166 int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1];
1169 get_options(buf, ARRAY_SIZE(value), value);
1171 /* We now have an array of ints starting at value[1], and
1172 * enumerated by value[0].
1173 * We expect each group of three ints is one table entry,
1174 * and the last table entry is all 0.
1177 if ((n % 3) || n < 6 ||
1178 n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) {
1179 dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n);
1183 if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) {
1184 dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n);
1188 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
1189 tsl2x7x_chip_off(indio_dev);
1191 /* Zero out the table */
1192 memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));
1193 memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4));
1195 tsl2x7x_invoke_change(indio_dev);
1200 static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev,
1201 struct device_attribute *attr, const char *buf, size_t len)
1203 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1206 if (strtobool(buf, &value))
1210 tsl2x7x_prox_cal(indio_dev);
1212 tsl2x7x_invoke_change(indio_dev);
1217 static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
1218 const struct iio_chan_spec *chan,
1219 enum iio_event_type type,
1220 enum iio_event_direction dir)
1222 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1225 if (chan->type == IIO_INTENSITY)
1226 ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10);
1228 ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20);
1233 static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
1234 const struct iio_chan_spec *chan,
1235 enum iio_event_type type,
1236 enum iio_event_direction dir,
1239 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1241 if (chan->type == IIO_INTENSITY) {
1243 chip->tsl2x7x_settings.interrupts_en |= 0x10;
1245 chip->tsl2x7x_settings.interrupts_en &= 0x20;
1248 chip->tsl2x7x_settings.interrupts_en |= 0x20;
1250 chip->tsl2x7x_settings.interrupts_en &= 0x10;
1253 tsl2x7x_invoke_change(indio_dev);
1258 static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
1259 const struct iio_chan_spec *chan,
1260 enum iio_event_type type,
1261 enum iio_event_direction dir,
1262 enum iio_event_info info,
1265 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1267 if (chan->type == IIO_INTENSITY) {
1269 case IIO_EV_DIR_RISING:
1270 chip->tsl2x7x_settings.als_thresh_high = val;
1272 case IIO_EV_DIR_FALLING:
1273 chip->tsl2x7x_settings.als_thresh_low = val;
1280 case IIO_EV_DIR_RISING:
1281 chip->tsl2x7x_settings.prox_thres_high = val;
1283 case IIO_EV_DIR_FALLING:
1284 chip->tsl2x7x_settings.prox_thres_low = val;
1291 tsl2x7x_invoke_change(indio_dev);
1296 static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
1297 const struct iio_chan_spec *chan,
1298 enum iio_event_type type,
1299 enum iio_event_direction dir,
1300 enum iio_event_info info,
1301 int *val, int *val2)
1303 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1305 if (chan->type == IIO_INTENSITY) {
1307 case IIO_EV_DIR_RISING:
1308 *val = chip->tsl2x7x_settings.als_thresh_high;
1310 case IIO_EV_DIR_FALLING:
1311 *val = chip->tsl2x7x_settings.als_thresh_low;
1318 case IIO_EV_DIR_RISING:
1319 *val = chip->tsl2x7x_settings.prox_thres_high;
1321 case IIO_EV_DIR_FALLING:
1322 *val = chip->tsl2x7x_settings.prox_thres_low;
1332 static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
1333 struct iio_chan_spec const *chan,
1339 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1342 case IIO_CHAN_INFO_PROCESSED:
1343 switch (chan->type) {
1345 tsl2x7x_get_lux(indio_dev);
1346 *val = chip->als_cur_info.lux;
1353 case IIO_CHAN_INFO_RAW:
1354 switch (chan->type) {
1356 tsl2x7x_get_lux(indio_dev);
1357 if (chan->channel == 0)
1358 *val = chip->als_cur_info.als_ch0;
1360 *val = chip->als_cur_info.als_ch1;
1364 tsl2x7x_get_prox(indio_dev);
1365 *val = chip->prox_data;
1372 case IIO_CHAN_INFO_CALIBSCALE:
1373 if (chan->type == IIO_LIGHT)
1375 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
1378 tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain];
1381 case IIO_CHAN_INFO_CALIBBIAS:
1382 *val = chip->tsl2x7x_settings.als_gain_trim;
1393 static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
1394 struct iio_chan_spec const *chan,
1399 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1402 case IIO_CHAN_INFO_CALIBSCALE:
1403 if (chan->type == IIO_INTENSITY) {
1406 chip->tsl2x7x_settings.als_gain = 0;
1409 chip->tsl2x7x_settings.als_gain = 1;
1412 chip->tsl2x7x_settings.als_gain = 2;
1423 chip->tsl2x7x_settings.als_gain = 3;
1434 chip->tsl2x7x_settings.als_gain = 3;
1442 chip->tsl2x7x_settings.prox_gain = 0;
1445 chip->tsl2x7x_settings.prox_gain = 1;
1448 chip->tsl2x7x_settings.prox_gain = 2;
1451 chip->tsl2x7x_settings.prox_gain = 3;
1458 case IIO_CHAN_INFO_CALIBBIAS:
1459 chip->tsl2x7x_settings.als_gain_trim = val;
1466 tsl2x7x_invoke_change(indio_dev);
1471 static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
1472 tsl2x7x_power_state_show, tsl2x7x_power_state_store);
1474 static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO,
1475 tsl2x7x_prox_gain_available_show, NULL);
1477 static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO,
1478 tsl2x7x_gain_available_show, NULL);
1480 static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR,
1481 tsl2x7x_als_time_show, tsl2x7x_als_time_store);
1483 static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR,
1484 tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
1486 static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL,
1487 tsl2x7x_do_calibrate);
1489 static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL,
1490 tsl2x7x_do_prox_calibrate);
1492 static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR,
1493 tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
1495 static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR,
1496 tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
1498 static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR,
1499 tsl2x7x_prox_persistence_show, tsl2x7x_prox_persistence_store);
1501 /* Use the default register values to identify the Taos device */
1502 static int tsl2x7x_device_id(unsigned char *id, int target)
1508 return (*id & 0xf0) == TRITON_ID;
1511 return (*id & 0xf0) == HALIBUT_ID;
1517 return (*id & 0xf0) == SWORDFISH_ID;
1523 static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
1525 struct iio_dev *indio_dev = private;
1526 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1527 s64 timestamp = iio_get_time_ns();
1531 value = i2c_smbus_read_byte_data(chip->client,
1532 TSL2X7X_CMD_REG | TSL2X7X_STATUS);
1534 /* What type of interrupt do we need to process */
1535 if (value & TSL2X7X_STA_PRX_INTR) {
1536 tsl2x7x_get_prox(indio_dev); /* freshen data for ABI */
1537 iio_push_event(indio_dev,
1538 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
1545 if (value & TSL2X7X_STA_ALS_INTR) {
1546 tsl2x7x_get_lux(indio_dev); /* freshen data for ABI */
1547 iio_push_event(indio_dev,
1548 IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
1554 /* Clear interrupt now that we have handled it. */
1555 ret = i2c_smbus_write_byte(chip->client,
1556 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
1557 TSL2X7X_CMD_PROXALS_INT_CLR);
1559 dev_err(&chip->client->dev,
1560 "Failed to clear irq from event handler. err = %d\n",
1566 static struct attribute *tsl2x7x_ALS_device_attrs[] = {
1567 &dev_attr_power_state.attr,
1568 &dev_attr_in_illuminance0_calibscale_available.attr,
1569 &dev_attr_in_illuminance0_integration_time.attr,
1570 &iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
1571 &dev_attr_in_illuminance0_target_input.attr,
1572 &dev_attr_in_illuminance0_calibrate.attr,
1573 &dev_attr_in_illuminance0_lux_table.attr,
1577 static struct attribute *tsl2x7x_PRX_device_attrs[] = {
1578 &dev_attr_power_state.attr,
1579 &dev_attr_in_proximity0_calibrate.attr,
1583 static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
1584 &dev_attr_power_state.attr,
1585 &dev_attr_in_illuminance0_calibscale_available.attr,
1586 &dev_attr_in_illuminance0_integration_time.attr,
1587 &iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
1588 &dev_attr_in_illuminance0_target_input.attr,
1589 &dev_attr_in_illuminance0_calibrate.attr,
1590 &dev_attr_in_illuminance0_lux_table.attr,
1591 &dev_attr_in_proximity0_calibrate.attr,
1595 static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
1596 &dev_attr_power_state.attr,
1597 &dev_attr_in_proximity0_calibrate.attr,
1598 &dev_attr_in_proximity0_calibscale_available.attr,
1602 static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
1603 &dev_attr_power_state.attr,
1604 &dev_attr_in_illuminance0_calibscale_available.attr,
1605 &dev_attr_in_illuminance0_integration_time.attr,
1606 &iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
1607 &dev_attr_in_illuminance0_target_input.attr,
1608 &dev_attr_in_illuminance0_calibrate.attr,
1609 &dev_attr_in_illuminance0_lux_table.attr,
1610 &dev_attr_in_proximity0_calibrate.attr,
1611 &dev_attr_in_proximity0_calibscale_available.attr,
1615 static struct attribute *tsl2X7X_ALS_event_attrs[] = {
1616 &dev_attr_in_intensity0_thresh_period.attr,
1619 static struct attribute *tsl2X7X_PRX_event_attrs[] = {
1620 &dev_attr_in_proximity0_thresh_period.attr,
1624 static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
1625 &dev_attr_in_intensity0_thresh_period.attr,
1626 &dev_attr_in_proximity0_thresh_period.attr,
1630 static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
1632 .attrs = tsl2x7x_ALS_device_attrs,
1635 .attrs = tsl2x7x_PRX_device_attrs,
1638 .attrs = tsl2x7x_ALSPRX_device_attrs,
1641 .attrs = tsl2x7x_PRX2_device_attrs,
1644 .attrs = tsl2x7x_ALSPRX2_device_attrs,
1648 static struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
1650 .attrs = tsl2X7X_ALS_event_attrs,
1654 .attrs = tsl2X7X_PRX_event_attrs,
1658 .attrs = tsl2X7X_ALSPRX_event_attrs,
1663 static const struct iio_info tsl2X7X_device_info[] = {
1665 .attrs = &tsl2X7X_device_attr_group_tbl[ALS],
1666 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALS],
1667 .driver_module = THIS_MODULE,
1668 .read_raw = &tsl2x7x_read_raw,
1669 .write_raw = &tsl2x7x_write_raw,
1670 .read_event_value = &tsl2x7x_read_thresh,
1671 .write_event_value = &tsl2x7x_write_thresh,
1672 .read_event_config = &tsl2x7x_read_interrupt_config,
1673 .write_event_config = &tsl2x7x_write_interrupt_config,
1676 .attrs = &tsl2X7X_device_attr_group_tbl[PRX],
1677 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1678 .driver_module = THIS_MODULE,
1679 .read_raw = &tsl2x7x_read_raw,
1680 .write_raw = &tsl2x7x_write_raw,
1681 .read_event_value = &tsl2x7x_read_thresh,
1682 .write_event_value = &tsl2x7x_write_thresh,
1683 .read_event_config = &tsl2x7x_read_interrupt_config,
1684 .write_event_config = &tsl2x7x_write_interrupt_config,
1687 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
1688 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1689 .driver_module = THIS_MODULE,
1690 .read_raw = &tsl2x7x_read_raw,
1691 .write_raw = &tsl2x7x_write_raw,
1692 .read_event_value = &tsl2x7x_read_thresh,
1693 .write_event_value = &tsl2x7x_write_thresh,
1694 .read_event_config = &tsl2x7x_read_interrupt_config,
1695 .write_event_config = &tsl2x7x_write_interrupt_config,
1698 .attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
1699 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1700 .driver_module = THIS_MODULE,
1701 .read_raw = &tsl2x7x_read_raw,
1702 .write_raw = &tsl2x7x_write_raw,
1703 .read_event_value = &tsl2x7x_read_thresh,
1704 .write_event_value = &tsl2x7x_write_thresh,
1705 .read_event_config = &tsl2x7x_read_interrupt_config,
1706 .write_event_config = &tsl2x7x_write_interrupt_config,
1709 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
1710 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1711 .driver_module = THIS_MODULE,
1712 .read_raw = &tsl2x7x_read_raw,
1713 .write_raw = &tsl2x7x_write_raw,
1714 .read_event_value = &tsl2x7x_read_thresh,
1715 .write_event_value = &tsl2x7x_write_thresh,
1716 .read_event_config = &tsl2x7x_read_interrupt_config,
1717 .write_event_config = &tsl2x7x_write_interrupt_config,
1721 static const struct iio_event_spec tsl2x7x_events[] = {
1723 .type = IIO_EV_TYPE_THRESH,
1724 .dir = IIO_EV_DIR_RISING,
1725 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1726 BIT(IIO_EV_INFO_ENABLE),
1728 .type = IIO_EV_TYPE_THRESH,
1729 .dir = IIO_EV_DIR_FALLING,
1730 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1731 BIT(IIO_EV_INFO_ENABLE),
1735 static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
1742 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1744 .type = IIO_INTENSITY,
1747 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1748 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1749 BIT(IIO_CHAN_INFO_CALIBBIAS),
1750 .event_spec = tsl2x7x_events,
1751 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1753 .type = IIO_INTENSITY,
1758 .chan_table_elements = 3,
1759 .info = &tsl2X7X_device_info[ALS],
1764 .type = IIO_PROXIMITY,
1767 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1768 .event_spec = tsl2x7x_events,
1769 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1772 .chan_table_elements = 1,
1773 .info = &tsl2X7X_device_info[PRX],
1781 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED)
1783 .type = IIO_INTENSITY,
1786 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1787 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1788 BIT(IIO_CHAN_INFO_CALIBBIAS),
1789 .event_spec = tsl2x7x_events,
1790 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1792 .type = IIO_INTENSITY,
1795 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1797 .type = IIO_PROXIMITY,
1800 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1801 .event_spec = tsl2x7x_events,
1802 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1805 .chan_table_elements = 4,
1806 .info = &tsl2X7X_device_info[ALSPRX],
1811 .type = IIO_PROXIMITY,
1814 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1815 BIT(IIO_CHAN_INFO_CALIBSCALE),
1816 .event_spec = tsl2x7x_events,
1817 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1820 .chan_table_elements = 1,
1821 .info = &tsl2X7X_device_info[PRX2],
1829 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1831 .type = IIO_INTENSITY,
1834 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1835 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1836 BIT(IIO_CHAN_INFO_CALIBBIAS),
1837 .event_spec = tsl2x7x_events,
1838 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1840 .type = IIO_INTENSITY,
1843 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1845 .type = IIO_PROXIMITY,
1848 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1849 BIT(IIO_CHAN_INFO_CALIBSCALE),
1850 .event_spec = tsl2x7x_events,
1851 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1854 .chan_table_elements = 4,
1855 .info = &tsl2X7X_device_info[ALSPRX2],
1859 static int tsl2x7x_probe(struct i2c_client *clientp,
1860 const struct i2c_device_id *id)
1863 unsigned char device_id;
1864 struct iio_dev *indio_dev;
1865 struct tsl2X7X_chip *chip;
1867 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
1871 chip = iio_priv(indio_dev);
1872 chip->client = clientp;
1873 i2c_set_clientdata(clientp, indio_dev);
1875 ret = tsl2x7x_i2c_read(chip->client,
1876 TSL2X7X_CHIPID, &device_id);
1880 if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
1881 (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
1882 dev_info(&chip->client->dev,
1883 "%s: i2c device found does not match expected id\n",
1888 ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
1890 dev_err(&clientp->dev, "write to cmd reg failed. err = %d\n",
1895 /* ALS and PROX functions can be invoked via user space poll
1896 * or H/W interrupt. If busy return last sample. */
1897 mutex_init(&chip->als_mutex);
1898 mutex_init(&chip->prox_mutex);
1900 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
1901 chip->pdata = clientp->dev.platform_data;
1902 chip->id = id->driver_data;
1904 &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
1906 indio_dev->info = chip->chip_info->info;
1907 indio_dev->dev.parent = &clientp->dev;
1908 indio_dev->modes = INDIO_DIRECT_MODE;
1909 indio_dev->name = chip->client->name;
1910 indio_dev->channels = chip->chip_info->channel;
1911 indio_dev->num_channels = chip->chip_info->chan_table_elements;
1914 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq,
1916 &tsl2x7x_event_handler,
1917 IRQF_TRIGGER_RISING |
1922 dev_err(&clientp->dev,
1923 "%s: irq request failed", __func__);
1928 /* Load up the defaults */
1929 tsl2x7x_defaults(chip);
1930 /* Make sure the chip is on */
1931 tsl2x7x_chip_on(indio_dev);
1933 ret = iio_device_register(indio_dev);
1935 dev_err(&clientp->dev,
1936 "%s: iio registration failed\n", __func__);
1940 dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
1945 static int tsl2x7x_suspend(struct device *dev)
1947 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1948 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1951 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
1952 ret = tsl2x7x_chip_off(indio_dev);
1953 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
1956 if (chip->pdata && chip->pdata->platform_power) {
1957 pm_message_t pmm = {PM_EVENT_SUSPEND};
1959 chip->pdata->platform_power(dev, pmm);
1965 static int tsl2x7x_resume(struct device *dev)
1967 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1968 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1971 if (chip->pdata && chip->pdata->platform_power) {
1972 pm_message_t pmm = {PM_EVENT_RESUME};
1974 chip->pdata->platform_power(dev, pmm);
1977 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
1978 ret = tsl2x7x_chip_on(indio_dev);
1983 static int tsl2x7x_remove(struct i2c_client *client)
1985 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1987 tsl2x7x_chip_off(indio_dev);
1989 iio_device_unregister(indio_dev);
1994 static struct i2c_device_id tsl2x7x_idtable[] = {
1995 { "tsl2571", tsl2571 },
1996 { "tsl2671", tsl2671 },
1997 { "tmd2671", tmd2671 },
1998 { "tsl2771", tsl2771 },
1999 { "tmd2771", tmd2771 },
2000 { "tsl2572", tsl2572 },
2001 { "tsl2672", tsl2672 },
2002 { "tmd2672", tmd2672 },
2003 { "tsl2772", tsl2772 },
2004 { "tmd2772", tmd2772 },
2008 MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
2010 static const struct dev_pm_ops tsl2x7x_pm_ops = {
2011 .suspend = tsl2x7x_suspend,
2012 .resume = tsl2x7x_resume,
2015 /* Driver definition */
2016 static struct i2c_driver tsl2x7x_driver = {
2019 .pm = &tsl2x7x_pm_ops,
2021 .id_table = tsl2x7x_idtable,
2022 .probe = tsl2x7x_probe,
2023 .remove = tsl2x7x_remove,
2026 module_i2c_driver(tsl2x7x_driver);
2028 MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
2029 MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
2030 MODULE_LICENSE("GPL");