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 /*Common device IIO EventMask */
128 #define TSL2X7X_EVENT_MASK \
129 (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \
130 IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)),
132 #define TSL2X7X_MIN_ITIME 3
134 /* TAOS txx2x7x Device family members */
149 TSL2X7X_CHIP_UNKNOWN = 0,
150 TSL2X7X_CHIP_WORKING = 1,
151 TSL2X7X_CHIP_SUSPENDED = 2
154 struct tsl2x7x_parse_result {
159 /* Per-device data */
160 struct tsl2x7x_als_info {
166 struct tsl2x7x_prox_stat {
170 unsigned long stddev;
173 struct tsl2x7x_chip_info {
174 int chan_table_elements;
175 struct iio_chan_spec channel[4];
176 const struct iio_info *info;
179 struct tsl2X7X_chip {
181 struct mutex prox_mutex;
182 struct mutex als_mutex;
183 struct i2c_client *client;
185 struct tsl2x7x_als_info als_cur_info;
186 struct tsl2x7x_settings tsl2x7x_settings;
187 struct tsl2X7X_platform_data *pdata;
190 int tsl2x7x_chip_status;
191 u8 tsl2x7x_config[TSL2X7X_MAX_CONFIG_REG];
192 const struct tsl2x7x_chip_info *chip_info;
193 const struct iio_info *info;
195 /* This structure is intentionally large to accommodate
196 * updates via sysfs. */
197 /* Sized to 9 = max 8 segments + 1 termination segment */
198 struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_TABLE_SIZE];
201 /* Different devices require different coefficents */
202 static const struct tsl2x7x_lux tsl2x71_lux_table[] = {
203 { 14461, 611, 1211 },
208 static const struct tsl2x7x_lux tmd2x71_lux_table[] = {
214 static const struct tsl2x7x_lux tsl2x72_lux_table[] = {
220 static const struct tsl2x7x_lux tmd2x72_lux_table[] = {
226 static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = {
227 [tsl2571] = tsl2x71_lux_table,
228 [tsl2671] = tsl2x71_lux_table,
229 [tmd2671] = tmd2x71_lux_table,
230 [tsl2771] = tsl2x71_lux_table,
231 [tmd2771] = tmd2x71_lux_table,
232 [tsl2572] = tsl2x72_lux_table,
233 [tsl2672] = tsl2x72_lux_table,
234 [tmd2672] = tmd2x72_lux_table,
235 [tsl2772] = tsl2x72_lux_table,
236 [tmd2772] = tmd2x72_lux_table,
239 static const struct tsl2x7x_settings tsl2x7x_default_settings = {
240 .als_time = 219, /* 101 ms */
242 .prx_time = 254, /* 5.4 ms */
246 .als_gain_trim = 1000,
247 .als_cal_target = 150,
248 .als_thresh_low = 200,
249 .als_thresh_high = 256,
253 .prox_thres_high = 512,
254 .prox_max_samples_cal = 30,
255 .prox_pulse_count = 8
258 static const s16 tsl2X7X_als_gainadj[] = {
265 static const s16 tsl2X7X_prx_gainadj[] = {
272 /* Channel variations */
281 static const u8 device_channel_config[] = {
295 * tsl2x7x_i2c_read() - Read a byte from a register.
296 * @client: i2c client
297 * @reg: device register to read from
298 * @*val: pointer to location to store register contents.
302 tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
306 /* select register to write */
307 ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
309 dev_err(&client->dev, "%s: failed to write register %x\n"
315 ret = i2c_smbus_read_byte(client);
319 dev_err(&client->dev, "%s: failed to read register %x\n"
326 * tsl2x7x_get_lux() - Reads and calculates current lux value.
327 * @indio_dev: pointer to IIO device
329 * The raw ch0 and ch1 values of the ambient light sensed in the last
330 * integration cycle are read from the device.
331 * Time scale factor array values are adjusted based on the integration time.
332 * The raw values are multiplied by a scale factor, and device gain is obtained
333 * using gain index. Limit checks are done next, then the ratio of a multiple
334 * of ch1 value, to the ch0 value, is calculated. Array tsl2x7x_device_lux[]
335 * is then scanned to find the first ratio value that is just above the ratio
336 * we just calculated. The ch0 and ch1 multiplier constants in the array are
337 * then used along with the time scale factor array values, to calculate the
340 static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
342 u16 ch0, ch1; /* separated ch0/ch1 data from device */
343 u32 lux; /* raw lux calculated from device data */
347 struct tsl2x7x_lux *p;
348 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
353 if (mutex_trylock(&chip->als_mutex) == 0)
354 return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
356 if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
357 /* device is not enabled */
358 dev_err(&chip->client->dev, "%s: device is not enabled\n",
364 ret = tsl2x7x_i2c_read(chip->client,
365 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
367 dev_err(&chip->client->dev,
368 "%s: Failed to read STATUS Reg\n", __func__);
371 /* is data new & valid */
372 if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
373 dev_err(&chip->client->dev,
374 "%s: data not valid yet\n", __func__);
375 ret = chip->als_cur_info.lux; /* return LAST VALUE */
379 for (i = 0; i < 4; i++) {
380 ret = tsl2x7x_i2c_read(chip->client,
381 (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
384 dev_err(&chip->client->dev,
385 "%s: failed to read. err=%x\n", __func__, ret);
390 /* clear any existing interrupt status */
391 ret = i2c_smbus_write_byte(chip->client,
394 TSL2X7X_CMD_ALS_INT_CLR));
396 dev_err(&chip->client->dev,
397 "%s: i2c_write_command failed - err = %d\n",
399 goto out_unlock; /* have no data, so return failure */
402 /* extract ALS/lux data */
403 ch0 = le16_to_cpup((const __le16 *)&buf[0]);
404 ch1 = le16_to_cpup((const __le16 *)&buf[2]);
406 chip->als_cur_info.als_ch0 = ch0;
407 chip->als_cur_info.als_ch1 = ch1;
409 if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) {
410 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
415 /* have no data, so return LAST VALUE */
416 ret = chip->als_cur_info.lux;
419 /* calculate ratio */
420 ratio = (ch1 << 15) / ch0;
421 /* convert to unscaled lux using the pointer to the table */
422 p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
423 while (p->ratio != 0 && p->ratio < ratio)
429 ch0lux = DIV_ROUND_UP((ch0 * p->ch0),
430 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
431 ch1lux = DIV_ROUND_UP((ch1 * p->ch1),
432 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
433 lux = ch0lux - ch1lux;
436 /* note: lux is 31 bit max at this point */
437 if (ch1lux > ch0lux) {
438 dev_dbg(&chip->client->dev, "ch1lux > ch0lux-return last value\n");
439 ret = chip->als_cur_info.lux;
443 /* adjust for active time scale */
444 if (chip->als_time_scale == 0)
447 lux = (lux + (chip->als_time_scale >> 1)) /
448 chip->als_time_scale;
450 /* adjust for active gain scale
451 * The tsl2x7x_device_lux tables have a factor of 256 built-in.
452 * User-specified gain provides a multiplier.
453 * Apply user-specified gain before shifting right to retain precision.
454 * Use 64 bits to avoid overflow on multiplication.
455 * Then go back to 32 bits before division to avoid using div_u64().
459 lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
462 lux = (lux + 500) / 1000;
464 if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */
465 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
467 /* Update the structure with the latest lux. */
469 chip->als_cur_info.lux = lux;
473 mutex_unlock(&chip->als_mutex);
479 * tsl2x7x_get_prox() - Reads proximity data registers and updates
482 * @indio_dev: pointer to IIO device
484 static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
490 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
492 if (mutex_trylock(&chip->prox_mutex) == 0) {
493 dev_err(&chip->client->dev,
494 "%s: Can't get prox mutex\n", __func__);
498 ret = tsl2x7x_i2c_read(chip->client,
499 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
501 dev_err(&chip->client->dev,
502 "%s: i2c err=%d\n", __func__, ret);
512 if (!(status & TSL2X7X_STA_ADC_VALID))
520 if (!(status & TSL2X7X_STA_PRX_VALID))
525 for (i = 0; i < 2; i++) {
526 ret = tsl2x7x_i2c_read(chip->client,
528 (TSL2X7X_PRX_LO + i)), &chdata[i]);
534 le16_to_cpup((const __le16 *)&chdata[0]);
538 mutex_unlock(&chip->prox_mutex);
540 return chip->prox_data;
544 * tsl2x7x_defaults() - Populates the device nominal operating parameters
545 * with those provided by a 'platform' data struct or
546 * with prefined defaults.
548 * @chip: pointer to device structure.
550 static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
552 /* If Operational settings defined elsewhere.. */
553 if (chip->pdata && chip->pdata->platform_default_settings != 0)
554 memcpy(&(chip->tsl2x7x_settings),
555 chip->pdata->platform_default_settings,
556 sizeof(tsl2x7x_default_settings));
558 memcpy(&(chip->tsl2x7x_settings),
559 &tsl2x7x_default_settings,
560 sizeof(tsl2x7x_default_settings));
562 /* Load up the proper lux table. */
563 if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0)
564 memcpy(chip->tsl2x7x_device_lux,
565 chip->pdata->platform_lux_table,
566 sizeof(chip->pdata->platform_lux_table));
568 memcpy(chip->tsl2x7x_device_lux,
569 (struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
570 MAX_DEFAULT_TABLE_BYTES);
574 * tsl2x7x_als_calibrate() - Obtain single reading and calculate
577 * @indio_dev: pointer to IIO device
579 static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
581 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
587 ret = i2c_smbus_write_byte(chip->client,
588 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
590 dev_err(&chip->client->dev,
591 "%s: failed to write CNTRL register, ret=%d\n",
596 reg_val = i2c_smbus_read_byte(chip->client);
597 if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
598 != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
599 dev_err(&chip->client->dev,
600 "%s: failed: ADC not enabled\n", __func__);
604 ret = i2c_smbus_write_byte(chip->client,
605 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
607 dev_err(&chip->client->dev,
608 "%s: failed to write ctrl reg: ret=%d\n",
613 reg_val = i2c_smbus_read_byte(chip->client);
614 if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
615 dev_err(&chip->client->dev,
616 "%s: failed: STATUS - ADC not valid.\n", __func__);
620 lux_val = tsl2x7x_get_lux(indio_dev);
622 dev_err(&chip->client->dev,
623 "%s: failed to get lux\n", __func__);
627 gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target)
628 * chip->tsl2x7x_settings.als_gain_trim) / lux_val);
629 if ((gain_trim_val < 250) || (gain_trim_val > 4000))
632 chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
633 dev_info(&chip->client->dev,
634 "%s als_calibrate completed\n", chip->client->name);
636 return (int) gain_trim_val;
639 static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
647 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
650 if (chip->pdata && chip->pdata->power_on)
651 chip->pdata->power_on(indio_dev);
653 /* Non calculated parameters */
654 chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
655 chip->tsl2x7x_settings.prx_time;
656 chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
657 chip->tsl2x7x_settings.wait_time;
658 chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
659 chip->tsl2x7x_settings.prox_config;
661 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
662 (chip->tsl2x7x_settings.als_thresh_low) & 0xFF;
663 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
664 (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF;
665 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
666 (chip->tsl2x7x_settings.als_thresh_high) & 0xFF;
667 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
668 (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF;
669 chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
670 chip->tsl2x7x_settings.persistence;
672 chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
673 chip->tsl2x7x_settings.prox_pulse_count;
674 chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
675 chip->tsl2x7x_settings.prox_thres_low;
676 chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
677 chip->tsl2x7x_settings.prox_thres_high;
679 /* and make sure we're not already on */
680 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
681 /* if forcing a register update - turn off, then on */
682 dev_info(&chip->client->dev, "device is already enabled\n");
686 /* determine als integration register */
687 als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
689 als_count = 1; /* ensure at least one cycle */
691 /* convert back to time (encompasses overrides) */
692 als_time = (als_count * 27 + 5) / 10;
693 chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
695 /* Set the gain based on tsl2x7x_settings struct */
696 chip->tsl2x7x_config[TSL2X7X_GAIN] =
697 (chip->tsl2x7x_settings.als_gain |
698 (TSL2X7X_mA100 | TSL2X7X_DIODE1)
699 | ((chip->tsl2x7x_settings.prox_gain) << 2));
701 /* set chip struct re scaling and saturation */
702 chip->als_saturation = als_count * 922; /* 90% of full scale */
703 chip->als_time_scale = (als_time + 25) / 50;
705 /* TSL2X7X Specific power-on / adc enable sequence
706 * Power on the device 1st. */
707 utmp = TSL2X7X_CNTL_PWR_ON;
708 ret = i2c_smbus_write_byte_data(chip->client,
709 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
711 dev_err(&chip->client->dev,
712 "%s: failed on CNTRL reg.\n", __func__);
716 /* Use the following shadow copy for our delay before enabling ADC.
717 * Write all the registers. */
718 for (i = 0, dev_reg = chip->tsl2x7x_config;
719 i < TSL2X7X_MAX_CONFIG_REG; i++) {
720 ret = i2c_smbus_write_byte_data(chip->client,
721 TSL2X7X_CMD_REG + i, *dev_reg++);
723 dev_err(&chip->client->dev,
724 "%s: failed on write to reg %d.\n", __func__, i);
729 mdelay(3); /* Power-on settling time */
731 /* NOW enable the ADC
732 * initialize the desired mode of operation */
733 utmp = TSL2X7X_CNTL_PWR_ON |
734 TSL2X7X_CNTL_ADC_ENBL |
735 TSL2X7X_CNTL_PROX_DET_ENBL;
736 ret = i2c_smbus_write_byte_data(chip->client,
737 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
739 dev_err(&chip->client->dev,
740 "%s: failed on 2nd CTRL reg.\n", __func__);
744 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
746 if (chip->tsl2x7x_settings.interrupts_en != 0) {
747 dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
749 reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
750 if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
751 (chip->tsl2x7x_settings.interrupts_en == 0x30))
752 reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
754 reg_val |= chip->tsl2x7x_settings.interrupts_en;
755 ret = i2c_smbus_write_byte_data(chip->client,
756 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
758 dev_err(&chip->client->dev,
759 "%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
762 /* Clear out any initial interrupts */
763 ret = i2c_smbus_write_byte(chip->client,
764 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
765 TSL2X7X_CMD_PROXALS_INT_CLR);
767 dev_err(&chip->client->dev,
768 "%s: Failed to clear Int status\n",
777 static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
780 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
782 /* turn device off */
783 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
785 ret = i2c_smbus_write_byte_data(chip->client,
786 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
788 if (chip->pdata && chip->pdata->power_off)
789 chip->pdata->power_off(chip->client);
795 * tsl2x7x_invoke_change
796 * @indio_dev: pointer to IIO device
798 * Obtain and lock both ALS and PROX resources,
799 * determine and save device state (On/Off),
800 * cycle device to implement updated parameter,
801 * put device back into proper state, and unlock
805 int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
807 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
808 int device_status = chip->tsl2x7x_chip_status;
810 mutex_lock(&chip->als_mutex);
811 mutex_lock(&chip->prox_mutex);
813 if (device_status == TSL2X7X_CHIP_WORKING)
814 tsl2x7x_chip_off(indio_dev);
816 tsl2x7x_chip_on(indio_dev);
818 if (device_status != TSL2X7X_CHIP_WORKING)
819 tsl2x7x_chip_off(indio_dev);
821 mutex_unlock(&chip->prox_mutex);
822 mutex_unlock(&chip->als_mutex);
828 void tsl2x7x_prox_calculate(int *data, int length,
829 struct tsl2x7x_prox_stat *statP)
839 statP->min = INT_MAX;
840 statP->max = INT_MIN;
841 for (i = 0; i < length; i++) {
842 sample_sum += data[i];
843 statP->min = min(statP->min, data[i]);
844 statP->max = max(statP->max, data[i]);
847 statP->mean = sample_sum / length;
849 for (i = 0; i < length; i++) {
850 tmp = data[i] - statP->mean;
851 sample_sum += tmp * tmp;
853 statP->stddev = int_sqrt((long)sample_sum)/length;
857 * tsl2x7x_prox_cal() - Calculates std. and sets thresholds.
858 * @indio_dev: pointer to IIO device
860 * Calculates a standard deviation based on the samples,
861 * and sets the threshold accordingly.
863 static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
865 int prox_history[MAX_SAMPLES_CAL + 1];
867 struct tsl2x7x_prox_stat prox_stat_data[2];
868 struct tsl2x7x_prox_stat *calP;
869 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
871 u8 current_state = chip->tsl2x7x_chip_status;
873 if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) {
874 dev_err(&chip->client->dev,
875 "%s: max prox samples cal is too big: %d\n",
876 __func__, chip->tsl2x7x_settings.prox_max_samples_cal);
877 chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
880 /* have to stop to change settings */
881 tsl2x7x_chip_off(indio_dev);
883 /* Enable proximity detection save just in case prox not wanted yet*/
884 tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
885 chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL;
887 /*turn on device if not already on*/
888 tsl2x7x_chip_on(indio_dev);
890 /*gather the samples*/
891 for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
893 tsl2x7x_get_prox(indio_dev);
894 prox_history[i] = chip->prox_data;
895 dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
899 tsl2x7x_chip_off(indio_dev);
900 calP = &prox_stat_data[PROX_STAT_CAL];
901 tsl2x7x_prox_calculate(prox_history,
902 chip->tsl2x7x_settings.prox_max_samples_cal, calP);
903 chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean;
905 dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
906 calP->min, calP->mean, calP->max);
907 dev_info(&chip->client->dev,
908 "%s proximity threshold set to %d\n",
909 chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
911 /* back to the way they were */
912 chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
913 if (current_state == TSL2X7X_CHIP_WORKING)
914 tsl2x7x_chip_on(indio_dev);
917 static ssize_t tsl2x7x_power_state_show(struct device *dev,
918 struct device_attribute *attr, char *buf)
920 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
922 return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
925 static ssize_t tsl2x7x_power_state_store(struct device *dev,
926 struct device_attribute *attr, const char *buf, size_t len)
928 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
931 if (strtobool(buf, &value))
935 tsl2x7x_chip_on(indio_dev);
937 tsl2x7x_chip_off(indio_dev);
942 static ssize_t tsl2x7x_gain_available_show(struct device *dev,
943 struct device_attribute *attr, char *buf)
945 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
953 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
957 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
960 static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev,
961 struct device_attribute *attr, char *buf)
963 return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
966 static ssize_t tsl2x7x_als_time_show(struct device *dev,
967 struct device_attribute *attr, char *buf)
969 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
972 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
973 z = y * TSL2X7X_MIN_ITIME;
977 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
980 static ssize_t tsl2x7x_als_time_store(struct device *dev,
981 struct device_attribute *attr, const char *buf, size_t len)
983 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
984 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
985 struct tsl2x7x_parse_result result;
988 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
993 chip->tsl2x7x_settings.als_time =
994 (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract);
996 dev_info(&chip->client->dev, "%s: als time = %d",
997 __func__, chip->tsl2x7x_settings.als_time);
999 tsl2x7x_invoke_change(indio_dev);
1001 return IIO_VAL_INT_PLUS_MICRO;
1004 static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
1007 static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
1008 struct device_attribute *attr, char *buf)
1010 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1012 return snprintf(buf, PAGE_SIZE, "%d\n",
1013 chip->tsl2x7x_settings.als_cal_target);
1016 static ssize_t tsl2x7x_als_cal_target_store(struct device *dev,
1017 struct device_attribute *attr, const char *buf, size_t len)
1019 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1020 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1021 unsigned long value;
1023 if (kstrtoul(buf, 0, &value))
1027 chip->tsl2x7x_settings.als_cal_target = value;
1029 tsl2x7x_invoke_change(indio_dev);
1034 /* persistence settings */
1035 static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
1036 struct device_attribute *attr, char *buf)
1038 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1039 int y, z, filter_delay;
1041 /* Determine integration time */
1042 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1043 z = y * TSL2X7X_MIN_ITIME;
1044 filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F);
1045 y = (filter_delay / 1000);
1046 z = (filter_delay % 1000);
1048 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1051 static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
1052 struct device_attribute *attr, const char *buf, size_t len)
1054 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1055 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1056 struct tsl2x7x_parse_result result;
1057 int y, z, filter_delay;
1060 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
1064 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1065 z = y * TSL2X7X_MIN_ITIME;
1068 DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
1070 chip->tsl2x7x_settings.persistence &= 0xF0;
1071 chip->tsl2x7x_settings.persistence |= (filter_delay & 0x0F);
1073 dev_info(&chip->client->dev, "%s: als persistence = %d",
1074 __func__, filter_delay);
1076 tsl2x7x_invoke_change(indio_dev);
1078 return IIO_VAL_INT_PLUS_MICRO;
1081 static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
1082 struct device_attribute *attr, char *buf)
1084 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1085 int y, z, filter_delay;
1087 /* Determine integration time */
1088 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1089 z = y * TSL2X7X_MIN_ITIME;
1090 filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4);
1091 y = (filter_delay / 1000);
1092 z = (filter_delay % 1000);
1094 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1097 static ssize_t tsl2x7x_prox_persistence_store(struct device *dev,
1098 struct device_attribute *attr, const char *buf, size_t len)
1100 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1101 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1102 struct tsl2x7x_parse_result result;
1103 int y, z, filter_delay;
1106 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
1110 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1111 z = y * TSL2X7X_MIN_ITIME;
1114 DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
1116 chip->tsl2x7x_settings.persistence &= 0x0F;
1117 chip->tsl2x7x_settings.persistence |= ((filter_delay << 4) & 0xF0);
1119 dev_info(&chip->client->dev, "%s: prox persistence = %d",
1120 __func__, filter_delay);
1122 tsl2x7x_invoke_change(indio_dev);
1124 return IIO_VAL_INT_PLUS_MICRO;
1127 static ssize_t tsl2x7x_do_calibrate(struct device *dev,
1128 struct device_attribute *attr, const char *buf, size_t len)
1130 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1133 if (strtobool(buf, &value))
1137 tsl2x7x_als_calibrate(indio_dev);
1139 tsl2x7x_invoke_change(indio_dev);
1144 static ssize_t tsl2x7x_luxtable_show(struct device *dev,
1145 struct device_attribute *attr, char *buf)
1147 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1151 while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) {
1152 offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,",
1153 chip->tsl2x7x_device_lux[i].ratio,
1154 chip->tsl2x7x_device_lux[i].ch0,
1155 chip->tsl2x7x_device_lux[i].ch1);
1156 if (chip->tsl2x7x_device_lux[i].ratio == 0) {
1157 /* We just printed the first "0" entry.
1158 * Now get rid of the extra "," and break. */
1165 offset += snprintf(buf + offset, PAGE_SIZE, "\n");
1169 static ssize_t tsl2x7x_luxtable_store(struct device *dev,
1170 struct device_attribute *attr, const char *buf, size_t len)
1172 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1173 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1174 int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1];
1177 get_options(buf, ARRAY_SIZE(value), value);
1179 /* We now have an array of ints starting at value[1], and
1180 * enumerated by value[0].
1181 * We expect each group of three ints is one table entry,
1182 * and the last table entry is all 0.
1185 if ((n % 3) || n < 6 ||
1186 n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) {
1187 dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n);
1191 if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) {
1192 dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n);
1196 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
1197 tsl2x7x_chip_off(indio_dev);
1199 /* Zero out the table */
1200 memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));
1201 memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4));
1203 tsl2x7x_invoke_change(indio_dev);
1208 static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev,
1209 struct device_attribute *attr, const char *buf, size_t len)
1211 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1214 if (strtobool(buf, &value))
1218 tsl2x7x_prox_cal(indio_dev);
1220 tsl2x7x_invoke_change(indio_dev);
1225 static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
1228 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1231 if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY)
1232 ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10);
1234 ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20);
1239 static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
1243 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1245 if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
1247 chip->tsl2x7x_settings.interrupts_en |= 0x10;
1249 chip->tsl2x7x_settings.interrupts_en &= 0x20;
1252 chip->tsl2x7x_settings.interrupts_en |= 0x20;
1254 chip->tsl2x7x_settings.interrupts_en &= 0x10;
1257 tsl2x7x_invoke_change(indio_dev);
1262 static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
1266 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1268 if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
1269 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
1270 case IIO_EV_DIR_RISING:
1271 chip->tsl2x7x_settings.als_thresh_high = val;
1273 case IIO_EV_DIR_FALLING:
1274 chip->tsl2x7x_settings.als_thresh_low = val;
1280 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
1281 case IIO_EV_DIR_RISING:
1282 chip->tsl2x7x_settings.prox_thres_high = val;
1284 case IIO_EV_DIR_FALLING:
1285 chip->tsl2x7x_settings.prox_thres_low = val;
1292 tsl2x7x_invoke_change(indio_dev);
1297 static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
1301 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1303 if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
1304 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
1305 case IIO_EV_DIR_RISING:
1306 *val = chip->tsl2x7x_settings.als_thresh_high;
1308 case IIO_EV_DIR_FALLING:
1309 *val = chip->tsl2x7x_settings.als_thresh_low;
1315 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
1316 case IIO_EV_DIR_RISING:
1317 *val = chip->tsl2x7x_settings.prox_thres_high;
1319 case IIO_EV_DIR_FALLING:
1320 *val = chip->tsl2x7x_settings.prox_thres_low;
1330 static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
1331 struct iio_chan_spec const *chan,
1337 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1340 case IIO_CHAN_INFO_PROCESSED:
1341 switch (chan->type) {
1343 tsl2x7x_get_lux(indio_dev);
1344 *val = chip->als_cur_info.lux;
1352 case IIO_CHAN_INFO_RAW:
1353 switch (chan->type) {
1355 tsl2x7x_get_lux(indio_dev);
1356 if (chan->channel == 0)
1357 *val = chip->als_cur_info.als_ch0;
1359 *val = chip->als_cur_info.als_ch1;
1363 tsl2x7x_get_prox(indio_dev);
1364 *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;
1424 chip->tsl2x7x_settings.als_gain = 3;
1436 chip->tsl2x7x_settings.als_gain = 3;
1444 chip->tsl2x7x_settings.prox_gain = 0;
1447 chip->tsl2x7x_settings.prox_gain = 1;
1450 chip->tsl2x7x_settings.prox_gain = 2;
1453 chip->tsl2x7x_settings.prox_gain = 3;
1460 case IIO_CHAN_INFO_CALIBBIAS:
1461 chip->tsl2x7x_settings.als_gain_trim = val;
1468 tsl2x7x_invoke_change(indio_dev);
1473 static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
1474 tsl2x7x_power_state_show, tsl2x7x_power_state_store);
1476 static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO,
1477 tsl2x7x_prox_gain_available_show, NULL);
1479 static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO,
1480 tsl2x7x_gain_available_show, NULL);
1482 static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR,
1483 tsl2x7x_als_time_show, tsl2x7x_als_time_store);
1485 static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR,
1486 tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
1488 static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL,
1489 tsl2x7x_do_calibrate);
1491 static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL,
1492 tsl2x7x_do_prox_calibrate);
1494 static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR,
1495 tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
1497 static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR,
1498 tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
1500 static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR,
1501 tsl2x7x_prox_persistence_show, tsl2x7x_prox_persistence_store);
1503 /* Use the default register values to identify the Taos device */
1504 static int tsl2x7x_device_id(unsigned char *id, int target)
1510 return ((*id & 0xf0) == TRITON_ID);
1514 return ((*id & 0xf0) == HALIBUT_ID);
1521 return ((*id & 0xf0) == SWORDFISH_ID);
1528 static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
1530 struct iio_dev *indio_dev = private;
1531 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1532 s64 timestamp = iio_get_time_ns();
1536 value = i2c_smbus_read_byte_data(chip->client,
1537 TSL2X7X_CMD_REG | TSL2X7X_STATUS);
1539 /* What type of interrupt do we need to process */
1540 if (value & TSL2X7X_STA_PRX_INTR) {
1541 tsl2x7x_get_prox(indio_dev); /* freshen data for ABI */
1542 iio_push_event(indio_dev,
1543 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
1550 if (value & TSL2X7X_STA_ALS_INTR) {
1551 tsl2x7x_get_lux(indio_dev); /* freshen data for ABI */
1552 iio_push_event(indio_dev,
1553 IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
1559 /* Clear interrupt now that we have handled it. */
1560 ret = i2c_smbus_write_byte(chip->client,
1561 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
1562 TSL2X7X_CMD_PROXALS_INT_CLR);
1564 dev_err(&chip->client->dev,
1565 "%s: Failed to clear irq from event handler. err = %d\n",
1571 static struct attribute *tsl2x7x_ALS_device_attrs[] = {
1572 &dev_attr_power_state.attr,
1573 &dev_attr_in_illuminance0_calibscale_available.attr,
1574 &dev_attr_in_illuminance0_integration_time.attr,
1575 &iio_const_attr_in_illuminance0_integration_time_available\
1577 &dev_attr_in_illuminance0_target_input.attr,
1578 &dev_attr_in_illuminance0_calibrate.attr,
1579 &dev_attr_in_illuminance0_lux_table.attr,
1583 static struct attribute *tsl2x7x_PRX_device_attrs[] = {
1584 &dev_attr_power_state.attr,
1585 &dev_attr_in_proximity0_calibrate.attr,
1589 static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
1590 &dev_attr_power_state.attr,
1591 &dev_attr_in_illuminance0_calibscale_available.attr,
1592 &dev_attr_in_illuminance0_integration_time.attr,
1593 &iio_const_attr_in_illuminance0_integration_time_available\
1595 &dev_attr_in_illuminance0_target_input.attr,
1596 &dev_attr_in_illuminance0_calibrate.attr,
1597 &dev_attr_in_illuminance0_lux_table.attr,
1598 &dev_attr_in_proximity0_calibrate.attr,
1602 static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
1603 &dev_attr_power_state.attr,
1604 &dev_attr_in_proximity0_calibrate.attr,
1605 &dev_attr_in_proximity0_calibscale_available.attr,
1609 static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
1610 &dev_attr_power_state.attr,
1611 &dev_attr_in_illuminance0_calibscale_available.attr,
1612 &dev_attr_in_illuminance0_integration_time.attr,
1613 &iio_const_attr_in_illuminance0_integration_time_available\
1615 &dev_attr_in_illuminance0_target_input.attr,
1616 &dev_attr_in_illuminance0_calibrate.attr,
1617 &dev_attr_in_illuminance0_lux_table.attr,
1618 &dev_attr_in_proximity0_calibrate.attr,
1619 &dev_attr_in_proximity0_calibscale_available.attr,
1623 static struct attribute *tsl2X7X_ALS_event_attrs[] = {
1624 &dev_attr_in_intensity0_thresh_period.attr,
1627 static struct attribute *tsl2X7X_PRX_event_attrs[] = {
1628 &dev_attr_in_proximity0_thresh_period.attr,
1632 static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
1633 &dev_attr_in_intensity0_thresh_period.attr,
1634 &dev_attr_in_proximity0_thresh_period.attr,
1638 static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
1640 .attrs = tsl2x7x_ALS_device_attrs,
1643 .attrs = tsl2x7x_PRX_device_attrs,
1646 .attrs = tsl2x7x_ALSPRX_device_attrs,
1649 .attrs = tsl2x7x_PRX2_device_attrs,
1652 .attrs = tsl2x7x_ALSPRX2_device_attrs,
1656 static struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
1658 .attrs = tsl2X7X_ALS_event_attrs,
1662 .attrs = tsl2X7X_PRX_event_attrs,
1666 .attrs = tsl2X7X_ALSPRX_event_attrs,
1671 static const struct iio_info tsl2X7X_device_info[] = {
1673 .attrs = &tsl2X7X_device_attr_group_tbl[ALS],
1674 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALS],
1675 .driver_module = THIS_MODULE,
1676 .read_raw = &tsl2x7x_read_raw,
1677 .write_raw = &tsl2x7x_write_raw,
1678 .read_event_value = &tsl2x7x_read_thresh,
1679 .write_event_value = &tsl2x7x_write_thresh,
1680 .read_event_config = &tsl2x7x_read_interrupt_config,
1681 .write_event_config = &tsl2x7x_write_interrupt_config,
1684 .attrs = &tsl2X7X_device_attr_group_tbl[PRX],
1685 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1686 .driver_module = THIS_MODULE,
1687 .read_raw = &tsl2x7x_read_raw,
1688 .write_raw = &tsl2x7x_write_raw,
1689 .read_event_value = &tsl2x7x_read_thresh,
1690 .write_event_value = &tsl2x7x_write_thresh,
1691 .read_event_config = &tsl2x7x_read_interrupt_config,
1692 .write_event_config = &tsl2x7x_write_interrupt_config,
1695 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
1696 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1697 .driver_module = THIS_MODULE,
1698 .read_raw = &tsl2x7x_read_raw,
1699 .write_raw = &tsl2x7x_write_raw,
1700 .read_event_value = &tsl2x7x_read_thresh,
1701 .write_event_value = &tsl2x7x_write_thresh,
1702 .read_event_config = &tsl2x7x_read_interrupt_config,
1703 .write_event_config = &tsl2x7x_write_interrupt_config,
1706 .attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
1707 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1708 .driver_module = THIS_MODULE,
1709 .read_raw = &tsl2x7x_read_raw,
1710 .write_raw = &tsl2x7x_write_raw,
1711 .read_event_value = &tsl2x7x_read_thresh,
1712 .write_event_value = &tsl2x7x_write_thresh,
1713 .read_event_config = &tsl2x7x_read_interrupt_config,
1714 .write_event_config = &tsl2x7x_write_interrupt_config,
1717 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
1718 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1719 .driver_module = THIS_MODULE,
1720 .read_raw = &tsl2x7x_read_raw,
1721 .write_raw = &tsl2x7x_write_raw,
1722 .read_event_value = &tsl2x7x_read_thresh,
1723 .write_event_value = &tsl2x7x_write_thresh,
1724 .read_event_config = &tsl2x7x_read_interrupt_config,
1725 .write_event_config = &tsl2x7x_write_interrupt_config,
1729 static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
1736 .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
1738 .type = IIO_INTENSITY,
1741 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1742 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
1743 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
1744 .event_mask = TSL2X7X_EVENT_MASK
1746 .type = IIO_INTENSITY,
1751 .chan_table_elements = 3,
1752 .info = &tsl2X7X_device_info[ALS],
1757 .type = IIO_PROXIMITY,
1760 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
1761 .event_mask = TSL2X7X_EVENT_MASK
1764 .chan_table_elements = 1,
1765 .info = &tsl2X7X_device_info[PRX],
1773 .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT
1775 .type = IIO_INTENSITY,
1778 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1779 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
1780 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
1781 .event_mask = TSL2X7X_EVENT_MASK
1783 .type = IIO_INTENSITY,
1786 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
1788 .type = IIO_PROXIMITY,
1791 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
1792 .event_mask = TSL2X7X_EVENT_MASK
1795 .chan_table_elements = 4,
1796 .info = &tsl2X7X_device_info[ALSPRX],
1801 .type = IIO_PROXIMITY,
1804 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1805 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
1806 .event_mask = TSL2X7X_EVENT_MASK
1809 .chan_table_elements = 1,
1810 .info = &tsl2X7X_device_info[PRX2],
1818 .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
1820 .type = IIO_INTENSITY,
1823 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1824 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
1825 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
1826 .event_mask = TSL2X7X_EVENT_MASK
1828 .type = IIO_INTENSITY,
1831 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
1833 .type = IIO_PROXIMITY,
1836 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1837 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
1838 .event_mask = TSL2X7X_EVENT_MASK
1841 .chan_table_elements = 4,
1842 .info = &tsl2X7X_device_info[ALSPRX2],
1846 static int tsl2x7x_probe(struct i2c_client *clientp,
1847 const struct i2c_device_id *id)
1850 unsigned char device_id;
1851 struct iio_dev *indio_dev;
1852 struct tsl2X7X_chip *chip;
1854 indio_dev = iio_device_alloc(sizeof(*chip));
1858 chip = iio_priv(indio_dev);
1859 chip->client = clientp;
1860 i2c_set_clientdata(clientp, indio_dev);
1862 ret = tsl2x7x_i2c_read(chip->client,
1863 TSL2X7X_CHIPID, &device_id);
1867 if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
1868 (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
1869 dev_info(&chip->client->dev,
1870 "%s: i2c device found does not match expected id\n",
1875 ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
1877 dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n",
1882 /* ALS and PROX functions can be invoked via user space poll
1883 * or H/W interrupt. If busy return last sample. */
1884 mutex_init(&chip->als_mutex);
1885 mutex_init(&chip->prox_mutex);
1887 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
1888 chip->pdata = clientp->dev.platform_data;
1889 chip->id = id->driver_data;
1891 &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
1893 indio_dev->info = chip->chip_info->info;
1894 indio_dev->dev.parent = &clientp->dev;
1895 indio_dev->modes = INDIO_DIRECT_MODE;
1896 indio_dev->name = chip->client->name;
1897 indio_dev->channels = chip->chip_info->channel;
1898 indio_dev->num_channels = chip->chip_info->chan_table_elements;
1901 ret = request_threaded_irq(clientp->irq,
1903 &tsl2x7x_event_handler,
1904 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
1908 dev_err(&clientp->dev,
1909 "%s: irq request failed", __func__);
1914 /* Load up the defaults */
1915 tsl2x7x_defaults(chip);
1916 /* Make sure the chip is on */
1917 tsl2x7x_chip_on(indio_dev);
1919 ret = iio_device_register(indio_dev);
1921 dev_err(&clientp->dev,
1922 "%s: iio registration failed\n", __func__);
1926 dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
1932 free_irq(clientp->irq, indio_dev);
1934 iio_device_free(indio_dev);
1939 static int tsl2x7x_suspend(struct device *dev)
1941 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1942 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1945 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
1946 ret = tsl2x7x_chip_off(indio_dev);
1947 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
1950 if (chip->pdata && chip->pdata->platform_power) {
1951 pm_message_t pmm = {PM_EVENT_SUSPEND};
1952 chip->pdata->platform_power(dev, pmm);
1958 static int tsl2x7x_resume(struct device *dev)
1960 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1961 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1964 if (chip->pdata && chip->pdata->platform_power) {
1965 pm_message_t pmm = {PM_EVENT_RESUME};
1966 chip->pdata->platform_power(dev, pmm);
1969 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
1970 ret = tsl2x7x_chip_on(indio_dev);
1975 static int tsl2x7x_remove(struct i2c_client *client)
1977 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1979 tsl2x7x_chip_off(indio_dev);
1981 iio_device_unregister(indio_dev);
1983 free_irq(client->irq, indio_dev);
1985 iio_device_free(indio_dev);
1990 static struct i2c_device_id tsl2x7x_idtable[] = {
1991 { "tsl2571", tsl2571 },
1992 { "tsl2671", tsl2671 },
1993 { "tmd2671", tmd2671 },
1994 { "tsl2771", tsl2771 },
1995 { "tmd2771", tmd2771 },
1996 { "tsl2572", tsl2572 },
1997 { "tsl2672", tsl2672 },
1998 { "tmd2672", tmd2672 },
1999 { "tsl2772", tsl2772 },
2000 { "tmd2772", tmd2772 },
2004 MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
2006 static const struct dev_pm_ops tsl2x7x_pm_ops = {
2007 .suspend = tsl2x7x_suspend,
2008 .resume = tsl2x7x_resume,
2011 /* Driver definition */
2012 static struct i2c_driver tsl2x7x_driver = {
2015 .pm = &tsl2x7x_pm_ops,
2017 .id_table = tsl2x7x_idtable,
2018 .probe = tsl2x7x_probe,
2019 .remove = tsl2x7x_remove,
2022 module_i2c_driver(tsl2x7x_driver);
2024 MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
2025 MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
2026 MODULE_LICENSE("GPL");