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_parse_buffer() - parse a decimal result from a buffer.
296 * @*buf: pointer to char buffer to parse
297 * @*result: pointer to buffer to contain
298 * resulting interger / decimal as ints.
302 tsl2x7x_parse_buffer(const char *buf, struct tsl2x7x_parse_result *result)
304 int integer = 0, fract = 0, fract_mult = 100000;
305 bool integer_part = true, negative = false;
313 if ('0' <= *buf && *buf <= '9') {
315 integer = integer*10 + *buf - '0';
317 fract += fract_mult*(*buf - '0');
322 } else if (*buf == '\n') {
323 if (*(buf + 1) == '\0')
327 } else if (*buf == '.') {
328 integer_part = false;
341 result->integer = integer;
342 result->fract = fract;
348 * tsl2x7x_i2c_read() - Read a byte from a register.
349 * @client: i2c client
350 * @reg: device register to read from
351 * @*val: pointer to location to store register contents.
355 tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
359 /* select register to write */
360 ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
362 dev_err(&client->dev, "%s: failed to write register %x\n"
368 ret = i2c_smbus_read_byte(client);
372 dev_err(&client->dev, "%s: failed to read register %x\n"
379 * tsl2x7x_get_lux() - Reads and calculates current lux value.
380 * @indio_dev: pointer to IIO device
382 * The raw ch0 and ch1 values of the ambient light sensed in the last
383 * integration cycle are read from the device.
384 * Time scale factor array values are adjusted based on the integration time.
385 * The raw values are multiplied by a scale factor, and device gain is obtained
386 * using gain index. Limit checks are done next, then the ratio of a multiple
387 * of ch1 value, to the ch0 value, is calculated. Array tsl2x7x_device_lux[]
388 * is then scanned to find the first ratio value that is just above the ratio
389 * we just calculated. The ch0 and ch1 multiplier constants in the array are
390 * then used along with the time scale factor array values, to calculate the
393 static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
395 u16 ch0, ch1; /* separated ch0/ch1 data from device */
396 u32 lux; /* raw lux calculated from device data */
400 struct tsl2x7x_lux *p;
401 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
406 if (mutex_trylock(&chip->als_mutex) == 0)
407 return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
409 if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
410 /* device is not enabled */
411 dev_err(&chip->client->dev, "%s: device is not enabled\n",
417 ret = tsl2x7x_i2c_read(chip->client,
418 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
420 dev_err(&chip->client->dev,
421 "%s: Failed to read STATUS Reg\n", __func__);
424 /* is data new & valid */
425 if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
426 dev_err(&chip->client->dev,
427 "%s: data not valid yet\n", __func__);
428 ret = chip->als_cur_info.lux; /* return LAST VALUE */
432 for (i = 0; i < 4; i++) {
433 ret = tsl2x7x_i2c_read(chip->client,
434 (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
437 dev_err(&chip->client->dev,
438 "%s: failed to read. err=%x\n", __func__, ret);
443 /* clear any existing interrupt status */
444 ret = i2c_smbus_write_byte(chip->client,
447 TSL2X7X_CMD_ALS_INT_CLR));
449 dev_err(&chip->client->dev,
450 "%s: i2c_write_command failed - err = %d\n",
452 goto out_unlock; /* have no data, so return failure */
455 /* extract ALS/lux data */
456 ch0 = le16_to_cpup((const __le16 *)&buf[0]);
457 ch1 = le16_to_cpup((const __le16 *)&buf[2]);
459 chip->als_cur_info.als_ch0 = ch0;
460 chip->als_cur_info.als_ch1 = ch1;
462 if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) {
463 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
468 /* have no data, so return LAST VALUE */
469 ret = chip->als_cur_info.lux;
472 /* calculate ratio */
473 ratio = (ch1 << 15) / ch0;
474 /* convert to unscaled lux using the pointer to the table */
475 p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
476 while (p->ratio != 0 && p->ratio < ratio)
482 ch0lux = DIV_ROUND_UP((ch0 * p->ch0),
483 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
484 ch1lux = DIV_ROUND_UP((ch1 * p->ch1),
485 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
486 lux = ch0lux - ch1lux;
489 /* note: lux is 31 bit max at this point */
490 if (ch1lux > ch0lux) {
491 dev_dbg(&chip->client->dev, "ch1lux > ch0lux-return last value\n");
492 ret = chip->als_cur_info.lux;
496 /* adjust for active time scale */
497 if (chip->als_time_scale == 0)
500 lux = (lux + (chip->als_time_scale >> 1)) /
501 chip->als_time_scale;
503 /* adjust for active gain scale
504 * The tsl2x7x_device_lux tables have a factor of 256 built-in.
505 * User-specified gain provides a multiplier.
506 * Apply user-specified gain before shifting right to retain precision.
507 * Use 64 bits to avoid overflow on multiplication.
508 * Then go back to 32 bits before division to avoid using div_u64().
512 lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
515 lux = (lux + 500) / 1000;
517 if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */
518 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
520 /* Update the structure with the latest lux. */
522 chip->als_cur_info.lux = lux;
526 mutex_unlock(&chip->als_mutex);
532 * tsl2x7x_get_prox() - Reads proximity data registers and updates
535 * @indio_dev: pointer to IIO device
537 static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
543 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
545 if (mutex_trylock(&chip->prox_mutex) == 0) {
546 dev_err(&chip->client->dev,
547 "%s: Can't get prox mutex\n", __func__);
551 ret = tsl2x7x_i2c_read(chip->client,
552 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
554 dev_err(&chip->client->dev,
555 "%s: i2c err=%d\n", __func__, ret);
565 if (!(status & TSL2X7X_STA_ADC_VALID))
573 if (!(status & TSL2X7X_STA_PRX_VALID))
578 for (i = 0; i < 2; i++) {
579 ret = tsl2x7x_i2c_read(chip->client,
581 (TSL2X7X_PRX_LO + i)), &chdata[i]);
587 le16_to_cpup((const __le16 *)&chdata[0]);
591 mutex_unlock(&chip->prox_mutex);
593 return chip->prox_data;
597 * tsl2x7x_defaults() - Populates the device nominal operating parameters
598 * with those provided by a 'platform' data struct or
599 * with prefined defaults.
601 * @chip: pointer to device structure.
603 static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
605 /* If Operational settings defined elsewhere.. */
606 if (chip->pdata && chip->pdata->platform_default_settings != 0)
607 memcpy(&(chip->tsl2x7x_settings),
608 chip->pdata->platform_default_settings,
609 sizeof(tsl2x7x_default_settings));
611 memcpy(&(chip->tsl2x7x_settings),
612 &tsl2x7x_default_settings,
613 sizeof(tsl2x7x_default_settings));
615 /* Load up the proper lux table. */
616 if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0)
617 memcpy(chip->tsl2x7x_device_lux,
618 chip->pdata->platform_lux_table,
619 sizeof(chip->pdata->platform_lux_table));
621 memcpy(chip->tsl2x7x_device_lux,
622 (struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
623 MAX_DEFAULT_TABLE_BYTES);
627 * tsl2x7x_als_calibrate() - Obtain single reading and calculate
630 * @indio_dev: pointer to IIO device
632 static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
634 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
640 ret = i2c_smbus_write_byte(chip->client,
641 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
643 dev_err(&chip->client->dev,
644 "%s: failed to write CNTRL register, ret=%d\n",
649 reg_val = i2c_smbus_read_byte(chip->client);
650 if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
651 != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
652 dev_err(&chip->client->dev,
653 "%s: failed: ADC not enabled\n", __func__);
657 ret = i2c_smbus_write_byte(chip->client,
658 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
660 dev_err(&chip->client->dev,
661 "%s: failed to write ctrl reg: ret=%d\n",
666 reg_val = i2c_smbus_read_byte(chip->client);
667 if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
668 dev_err(&chip->client->dev,
669 "%s: failed: STATUS - ADC not valid.\n", __func__);
673 lux_val = tsl2x7x_get_lux(indio_dev);
675 dev_err(&chip->client->dev,
676 "%s: failed to get lux\n", __func__);
680 gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target)
681 * chip->tsl2x7x_settings.als_gain_trim) / lux_val);
682 if ((gain_trim_val < 250) || (gain_trim_val > 4000))
685 chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
686 dev_info(&chip->client->dev,
687 "%s als_calibrate completed\n", chip->client->name);
689 return (int) gain_trim_val;
692 static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
700 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
703 if (chip->pdata && chip->pdata->power_on)
704 chip->pdata->power_on(indio_dev);
706 /* Non calculated parameters */
707 chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
708 chip->tsl2x7x_settings.prx_time;
709 chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
710 chip->tsl2x7x_settings.wait_time;
711 chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
712 chip->tsl2x7x_settings.prox_config;
714 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
715 (chip->tsl2x7x_settings.als_thresh_low) & 0xFF;
716 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
717 (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF;
718 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
719 (chip->tsl2x7x_settings.als_thresh_high) & 0xFF;
720 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
721 (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF;
722 chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
723 chip->tsl2x7x_settings.persistence;
725 chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
726 chip->tsl2x7x_settings.prox_pulse_count;
727 chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
728 chip->tsl2x7x_settings.prox_thres_low;
729 chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
730 chip->tsl2x7x_settings.prox_thres_high;
732 /* and make sure we're not already on */
733 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
734 /* if forcing a register update - turn off, then on */
735 dev_info(&chip->client->dev, "device is already enabled\n");
739 /* determine als integration register */
740 als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
742 als_count = 1; /* ensure at least one cycle */
744 /* convert back to time (encompasses overrides) */
745 als_time = (als_count * 27 + 5) / 10;
746 chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
748 /* Set the gain based on tsl2x7x_settings struct */
749 chip->tsl2x7x_config[TSL2X7X_GAIN] =
750 (chip->tsl2x7x_settings.als_gain |
751 (TSL2X7X_mA100 | TSL2X7X_DIODE1)
752 | ((chip->tsl2x7x_settings.prox_gain) << 2));
754 /* set chip struct re scaling and saturation */
755 chip->als_saturation = als_count * 922; /* 90% of full scale */
756 chip->als_time_scale = (als_time + 25) / 50;
758 /* TSL2X7X Specific power-on / adc enable sequence
759 * Power on the device 1st. */
760 utmp = TSL2X7X_CNTL_PWR_ON;
761 ret = i2c_smbus_write_byte_data(chip->client,
762 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
764 dev_err(&chip->client->dev,
765 "%s: failed on CNTRL reg.\n", __func__);
769 /* Use the following shadow copy for our delay before enabling ADC.
770 * Write all the registers. */
771 for (i = 0, dev_reg = chip->tsl2x7x_config;
772 i < TSL2X7X_MAX_CONFIG_REG; i++) {
773 ret = i2c_smbus_write_byte_data(chip->client,
774 TSL2X7X_CMD_REG + i, *dev_reg++);
776 dev_err(&chip->client->dev,
777 "%s: failed on write to reg %d.\n", __func__, i);
782 mdelay(3); /* Power-on settling time */
784 /* NOW enable the ADC
785 * initialize the desired mode of operation */
786 utmp = TSL2X7X_CNTL_PWR_ON |
787 TSL2X7X_CNTL_ADC_ENBL |
788 TSL2X7X_CNTL_PROX_DET_ENBL;
789 ret = i2c_smbus_write_byte_data(chip->client,
790 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
792 dev_err(&chip->client->dev,
793 "%s: failed on 2nd CTRL reg.\n", __func__);
797 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
799 if (chip->tsl2x7x_settings.interrupts_en != 0) {
800 dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
802 reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
803 if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
804 (chip->tsl2x7x_settings.interrupts_en == 0x30))
805 reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
807 reg_val |= chip->tsl2x7x_settings.interrupts_en;
808 ret = i2c_smbus_write_byte_data(chip->client,
809 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
811 dev_err(&chip->client->dev,
812 "%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
815 /* Clear out any initial interrupts */
816 ret = i2c_smbus_write_byte(chip->client,
817 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
818 TSL2X7X_CMD_PROXALS_INT_CLR);
820 dev_err(&chip->client->dev,
821 "%s: Failed to clear Int status\n",
830 static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
833 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
835 /* turn device off */
836 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
838 ret = i2c_smbus_write_byte_data(chip->client,
839 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
841 if (chip->pdata && chip->pdata->power_off)
842 chip->pdata->power_off(chip->client);
848 * tsl2x7x_invoke_change
849 * @indio_dev: pointer to IIO device
851 * Obtain and lock both ALS and PROX resources,
852 * determine and save device state (On/Off),
853 * cycle device to implement updated parameter,
854 * put device back into proper state, and unlock
858 int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
860 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
861 int device_status = chip->tsl2x7x_chip_status;
863 mutex_lock(&chip->als_mutex);
864 mutex_lock(&chip->prox_mutex);
866 if (device_status == TSL2X7X_CHIP_WORKING)
867 tsl2x7x_chip_off(indio_dev);
869 tsl2x7x_chip_on(indio_dev);
871 if (device_status != TSL2X7X_CHIP_WORKING)
872 tsl2x7x_chip_off(indio_dev);
874 mutex_unlock(&chip->prox_mutex);
875 mutex_unlock(&chip->als_mutex);
881 void tsl2x7x_prox_calculate(int *data, int length,
882 struct tsl2x7x_prox_stat *statP)
892 statP->min = INT_MAX;
893 statP->max = INT_MIN;
894 for (i = 0; i < length; i++) {
895 sample_sum += data[i];
896 statP->min = min(statP->min, data[i]);
897 statP->max = max(statP->max, data[i]);
900 statP->mean = sample_sum / length;
902 for (i = 0; i < length; i++) {
903 tmp = data[i] - statP->mean;
904 sample_sum += tmp * tmp;
906 statP->stddev = int_sqrt((long)sample_sum)/length;
910 * tsl2x7x_prox_cal() - Calculates std. and sets thresholds.
911 * @indio_dev: pointer to IIO device
913 * Calculates a standard deviation based on the samples,
914 * and sets the threshold accordingly.
916 static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
918 int prox_history[MAX_SAMPLES_CAL + 1];
920 struct tsl2x7x_prox_stat prox_stat_data[2];
921 struct tsl2x7x_prox_stat *calP;
922 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
924 u8 current_state = chip->tsl2x7x_chip_status;
926 if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) {
927 dev_err(&chip->client->dev,
928 "%s: max prox samples cal is too big: %d\n",
929 __func__, chip->tsl2x7x_settings.prox_max_samples_cal);
930 chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
933 /* have to stop to change settings */
934 tsl2x7x_chip_off(indio_dev);
936 /* Enable proximity detection save just in case prox not wanted yet*/
937 tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
938 chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL;
940 /*turn on device if not already on*/
941 tsl2x7x_chip_on(indio_dev);
943 /*gather the samples*/
944 for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
946 tsl2x7x_get_prox(indio_dev);
947 prox_history[i] = chip->prox_data;
948 dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
952 tsl2x7x_chip_off(indio_dev);
953 calP = &prox_stat_data[PROX_STAT_CAL];
954 tsl2x7x_prox_calculate(prox_history,
955 chip->tsl2x7x_settings.prox_max_samples_cal, calP);
956 chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean;
958 dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
959 calP->min, calP->mean, calP->max);
960 dev_info(&chip->client->dev,
961 "%s proximity threshold set to %d\n",
962 chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
964 /* back to the way they were */
965 chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
966 if (current_state == TSL2X7X_CHIP_WORKING)
967 tsl2x7x_chip_on(indio_dev);
970 static ssize_t tsl2x7x_power_state_show(struct device *dev,
971 struct device_attribute *attr, char *buf)
973 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
975 return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
978 static ssize_t tsl2x7x_power_state_store(struct device *dev,
979 struct device_attribute *attr, const char *buf, size_t len)
981 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
984 if (strtobool(buf, &value))
988 tsl2x7x_chip_on(indio_dev);
990 tsl2x7x_chip_off(indio_dev);
995 static ssize_t tsl2x7x_gain_available_show(struct device *dev,
996 struct device_attribute *attr, char *buf)
998 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1006 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
1010 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
1013 static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev,
1014 struct device_attribute *attr, char *buf)
1016 return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
1019 static ssize_t tsl2x7x_als_time_show(struct device *dev,
1020 struct device_attribute *attr, char *buf)
1022 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1025 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1026 z = y * TSL2X7X_MIN_ITIME;
1030 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1033 static ssize_t tsl2x7x_als_time_store(struct device *dev,
1034 struct device_attribute *attr, const char *buf, size_t len)
1036 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1037 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1038 struct tsl2x7x_parse_result result;
1043 tsl2x7x_parse_buffer(buf, &result);
1045 result.fract /= 1000;
1047 chip->tsl2x7x_settings.als_time =
1048 (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract);
1050 dev_info(&chip->client->dev, "%s: als time = %d",
1051 __func__, chip->tsl2x7x_settings.als_time);
1053 tsl2x7x_invoke_change(indio_dev);
1055 return IIO_VAL_INT_PLUS_MICRO;
1058 static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
1061 static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
1062 struct device_attribute *attr, char *buf)
1064 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1066 return snprintf(buf, PAGE_SIZE, "%d\n",
1067 chip->tsl2x7x_settings.als_cal_target);
1070 static ssize_t tsl2x7x_als_cal_target_store(struct device *dev,
1071 struct device_attribute *attr, const char *buf, size_t len)
1073 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1074 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1075 unsigned long value;
1077 if (kstrtoul(buf, 0, &value))
1081 chip->tsl2x7x_settings.als_cal_target = value;
1083 tsl2x7x_invoke_change(indio_dev);
1088 /* persistence settings */
1089 static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
1090 struct device_attribute *attr, char *buf)
1092 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1093 int y, z, filter_delay;
1095 /* Determine integration time */
1096 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1097 z = y * TSL2X7X_MIN_ITIME;
1098 filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F);
1099 y = (filter_delay / 1000);
1100 z = (filter_delay % 1000);
1102 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1105 static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
1106 struct device_attribute *attr, const char *buf, size_t len)
1108 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1109 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1110 struct tsl2x7x_parse_result result;
1111 int y, z, filter_delay;
1115 tsl2x7x_parse_buffer(buf, &result);
1117 result.fract /= 1000;
1118 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1119 z = y * TSL2X7X_MIN_ITIME;
1122 DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
1124 chip->tsl2x7x_settings.persistence &= 0xF0;
1125 chip->tsl2x7x_settings.persistence |= (filter_delay & 0x0F);
1127 dev_info(&chip->client->dev, "%s: als persistence = %d",
1128 __func__, filter_delay);
1130 tsl2x7x_invoke_change(indio_dev);
1132 return IIO_VAL_INT_PLUS_MICRO;
1135 static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
1136 struct device_attribute *attr, char *buf)
1138 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1139 int y, z, filter_delay;
1141 /* Determine integration time */
1142 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1143 z = y * TSL2X7X_MIN_ITIME;
1144 filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4);
1145 y = (filter_delay / 1000);
1146 z = (filter_delay % 1000);
1148 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1151 static ssize_t tsl2x7x_prox_persistence_store(struct device *dev,
1152 struct device_attribute *attr, const char *buf, size_t len)
1154 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1155 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1156 struct tsl2x7x_parse_result result;
1157 int y, z, filter_delay;
1161 tsl2x7x_parse_buffer(buf, &result);
1163 result.fract /= 1000;
1164 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1165 z = y * TSL2X7X_MIN_ITIME;
1168 DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
1170 chip->tsl2x7x_settings.persistence &= 0x0F;
1171 chip->tsl2x7x_settings.persistence |= ((filter_delay << 4) & 0xF0);
1173 dev_info(&chip->client->dev, "%s: prox persistence = %d",
1174 __func__, filter_delay);
1176 tsl2x7x_invoke_change(indio_dev);
1178 return IIO_VAL_INT_PLUS_MICRO;
1181 static ssize_t tsl2x7x_do_calibrate(struct device *dev,
1182 struct device_attribute *attr, const char *buf, size_t len)
1184 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1187 if (strtobool(buf, &value))
1191 tsl2x7x_als_calibrate(indio_dev);
1193 tsl2x7x_invoke_change(indio_dev);
1198 static ssize_t tsl2x7x_luxtable_show(struct device *dev,
1199 struct device_attribute *attr, char *buf)
1201 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1205 while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) {
1206 offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,",
1207 chip->tsl2x7x_device_lux[i].ratio,
1208 chip->tsl2x7x_device_lux[i].ch0,
1209 chip->tsl2x7x_device_lux[i].ch1);
1210 if (chip->tsl2x7x_device_lux[i].ratio == 0) {
1211 /* We just printed the first "0" entry.
1212 * Now get rid of the extra "," and break. */
1219 offset += snprintf(buf + offset, PAGE_SIZE, "\n");
1223 static ssize_t tsl2x7x_luxtable_store(struct device *dev,
1224 struct device_attribute *attr, const char *buf, size_t len)
1226 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1227 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1228 int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1];
1231 get_options(buf, ARRAY_SIZE(value), value);
1233 /* We now have an array of ints starting at value[1], and
1234 * enumerated by value[0].
1235 * We expect each group of three ints is one table entry,
1236 * and the last table entry is all 0.
1239 if ((n % 3) || n < 6 ||
1240 n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) {
1241 dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n);
1245 if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) {
1246 dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n);
1250 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
1251 tsl2x7x_chip_off(indio_dev);
1253 /* Zero out the table */
1254 memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));
1255 memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4));
1257 tsl2x7x_invoke_change(indio_dev);
1262 static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev,
1263 struct device_attribute *attr, const char *buf, size_t len)
1265 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1268 if (strtobool(buf, &value))
1272 tsl2x7x_prox_cal(indio_dev);
1274 tsl2x7x_invoke_change(indio_dev);
1279 static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
1282 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1285 if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY)
1286 ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10);
1288 ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20);
1293 static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
1297 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1299 if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
1301 chip->tsl2x7x_settings.interrupts_en |= 0x10;
1303 chip->tsl2x7x_settings.interrupts_en &= 0x20;
1306 chip->tsl2x7x_settings.interrupts_en |= 0x20;
1308 chip->tsl2x7x_settings.interrupts_en &= 0x10;
1311 tsl2x7x_invoke_change(indio_dev);
1316 static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
1320 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1322 if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
1323 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
1324 case IIO_EV_DIR_RISING:
1325 chip->tsl2x7x_settings.als_thresh_high = val;
1327 case IIO_EV_DIR_FALLING:
1328 chip->tsl2x7x_settings.als_thresh_low = val;
1334 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
1335 case IIO_EV_DIR_RISING:
1336 chip->tsl2x7x_settings.prox_thres_high = val;
1338 case IIO_EV_DIR_FALLING:
1339 chip->tsl2x7x_settings.prox_thres_low = val;
1346 tsl2x7x_invoke_change(indio_dev);
1351 static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
1355 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1357 if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
1358 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
1359 case IIO_EV_DIR_RISING:
1360 *val = chip->tsl2x7x_settings.als_thresh_high;
1362 case IIO_EV_DIR_FALLING:
1363 *val = chip->tsl2x7x_settings.als_thresh_low;
1369 switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
1370 case IIO_EV_DIR_RISING:
1371 *val = chip->tsl2x7x_settings.prox_thres_high;
1373 case IIO_EV_DIR_FALLING:
1374 *val = chip->tsl2x7x_settings.prox_thres_low;
1384 static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
1385 struct iio_chan_spec const *chan,
1391 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1394 case IIO_CHAN_INFO_PROCESSED:
1395 switch (chan->type) {
1397 tsl2x7x_get_lux(indio_dev);
1398 *val = chip->als_cur_info.lux;
1406 case IIO_CHAN_INFO_RAW:
1407 switch (chan->type) {
1409 tsl2x7x_get_lux(indio_dev);
1410 if (chan->channel == 0)
1411 *val = chip->als_cur_info.als_ch0;
1413 *val = chip->als_cur_info.als_ch1;
1417 tsl2x7x_get_prox(indio_dev);
1418 *val = chip->prox_data;
1426 case IIO_CHAN_INFO_CALIBSCALE:
1427 if (chan->type == IIO_LIGHT)
1429 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
1432 tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain];
1435 case IIO_CHAN_INFO_CALIBBIAS:
1436 *val = chip->tsl2x7x_settings.als_gain_trim;
1447 static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
1448 struct iio_chan_spec const *chan,
1453 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1456 case IIO_CHAN_INFO_CALIBSCALE:
1457 if (chan->type == IIO_INTENSITY) {
1460 chip->tsl2x7x_settings.als_gain = 0;
1463 chip->tsl2x7x_settings.als_gain = 1;
1466 chip->tsl2x7x_settings.als_gain = 2;
1478 chip->tsl2x7x_settings.als_gain = 3;
1490 chip->tsl2x7x_settings.als_gain = 3;
1498 chip->tsl2x7x_settings.prox_gain = 0;
1501 chip->tsl2x7x_settings.prox_gain = 1;
1504 chip->tsl2x7x_settings.prox_gain = 2;
1507 chip->tsl2x7x_settings.prox_gain = 3;
1514 case IIO_CHAN_INFO_CALIBBIAS:
1515 chip->tsl2x7x_settings.als_gain_trim = val;
1522 tsl2x7x_invoke_change(indio_dev);
1527 static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
1528 tsl2x7x_power_state_show, tsl2x7x_power_state_store);
1530 static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO,
1531 tsl2x7x_prox_gain_available_show, NULL);
1533 static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO,
1534 tsl2x7x_gain_available_show, NULL);
1536 static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR,
1537 tsl2x7x_als_time_show, tsl2x7x_als_time_store);
1539 static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR,
1540 tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
1542 static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL,
1543 tsl2x7x_do_calibrate);
1545 static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL,
1546 tsl2x7x_do_prox_calibrate);
1548 static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR,
1549 tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
1551 static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR,
1552 tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
1554 static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR,
1555 tsl2x7x_prox_persistence_show, tsl2x7x_prox_persistence_store);
1557 /* Use the default register values to identify the Taos device */
1558 static int tsl2x7x_device_id(unsigned char *id, int target)
1564 return ((*id & 0xf0) == TRITON_ID);
1568 return ((*id & 0xf0) == HALIBUT_ID);
1575 return ((*id & 0xf0) == SWORDFISH_ID);
1582 static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
1584 struct iio_dev *indio_dev = private;
1585 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1586 s64 timestamp = iio_get_time_ns();
1590 value = i2c_smbus_read_byte_data(chip->client,
1591 TSL2X7X_CMD_REG | TSL2X7X_STATUS);
1593 /* What type of interrupt do we need to process */
1594 if (value & TSL2X7X_STA_PRX_INTR) {
1595 tsl2x7x_get_prox(indio_dev); /* freshen data for ABI */
1596 iio_push_event(indio_dev,
1597 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
1604 if (value & TSL2X7X_STA_ALS_INTR) {
1605 tsl2x7x_get_lux(indio_dev); /* freshen data for ABI */
1606 iio_push_event(indio_dev,
1607 IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
1613 /* Clear interrupt now that we have handled it. */
1614 ret = i2c_smbus_write_byte(chip->client,
1615 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
1616 TSL2X7X_CMD_PROXALS_INT_CLR);
1618 dev_err(&chip->client->dev,
1619 "%s: Failed to clear irq from event handler. err = %d\n",
1625 static struct attribute *tsl2x7x_ALS_device_attrs[] = {
1626 &dev_attr_power_state.attr,
1627 &dev_attr_in_illuminance0_calibscale_available.attr,
1628 &dev_attr_in_illuminance0_integration_time.attr,
1629 &iio_const_attr_in_illuminance0_integration_time_available\
1631 &dev_attr_in_illuminance0_target_input.attr,
1632 &dev_attr_in_illuminance0_calibrate.attr,
1633 &dev_attr_in_illuminance0_lux_table.attr,
1637 static struct attribute *tsl2x7x_PRX_device_attrs[] = {
1638 &dev_attr_power_state.attr,
1639 &dev_attr_in_proximity0_calibrate.attr,
1643 static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
1644 &dev_attr_power_state.attr,
1645 &dev_attr_in_illuminance0_calibscale_available.attr,
1646 &dev_attr_in_illuminance0_integration_time.attr,
1647 &iio_const_attr_in_illuminance0_integration_time_available\
1649 &dev_attr_in_illuminance0_target_input.attr,
1650 &dev_attr_in_illuminance0_calibrate.attr,
1651 &dev_attr_in_illuminance0_lux_table.attr,
1652 &dev_attr_in_proximity0_calibrate.attr,
1656 static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
1657 &dev_attr_power_state.attr,
1658 &dev_attr_in_proximity0_calibrate.attr,
1659 &dev_attr_in_proximity0_calibscale_available.attr,
1663 static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
1664 &dev_attr_power_state.attr,
1665 &dev_attr_in_illuminance0_calibscale_available.attr,
1666 &dev_attr_in_illuminance0_integration_time.attr,
1667 &iio_const_attr_in_illuminance0_integration_time_available\
1669 &dev_attr_in_illuminance0_target_input.attr,
1670 &dev_attr_in_illuminance0_calibrate.attr,
1671 &dev_attr_in_illuminance0_lux_table.attr,
1672 &dev_attr_in_proximity0_calibrate.attr,
1673 &dev_attr_in_proximity0_calibscale_available.attr,
1677 static struct attribute *tsl2X7X_ALS_event_attrs[] = {
1678 &dev_attr_in_intensity0_thresh_period.attr,
1681 static struct attribute *tsl2X7X_PRX_event_attrs[] = {
1682 &dev_attr_in_proximity0_thresh_period.attr,
1686 static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
1687 &dev_attr_in_intensity0_thresh_period.attr,
1688 &dev_attr_in_proximity0_thresh_period.attr,
1692 static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
1694 .attrs = tsl2x7x_ALS_device_attrs,
1697 .attrs = tsl2x7x_PRX_device_attrs,
1700 .attrs = tsl2x7x_ALSPRX_device_attrs,
1703 .attrs = tsl2x7x_PRX2_device_attrs,
1706 .attrs = tsl2x7x_ALSPRX2_device_attrs,
1710 static struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
1712 .attrs = tsl2X7X_ALS_event_attrs,
1716 .attrs = tsl2X7X_PRX_event_attrs,
1720 .attrs = tsl2X7X_ALSPRX_event_attrs,
1725 static const struct iio_info tsl2X7X_device_info[] = {
1727 .attrs = &tsl2X7X_device_attr_group_tbl[ALS],
1728 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALS],
1729 .driver_module = THIS_MODULE,
1730 .read_raw = &tsl2x7x_read_raw,
1731 .write_raw = &tsl2x7x_write_raw,
1732 .read_event_value = &tsl2x7x_read_thresh,
1733 .write_event_value = &tsl2x7x_write_thresh,
1734 .read_event_config = &tsl2x7x_read_interrupt_config,
1735 .write_event_config = &tsl2x7x_write_interrupt_config,
1738 .attrs = &tsl2X7X_device_attr_group_tbl[PRX],
1739 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1740 .driver_module = THIS_MODULE,
1741 .read_raw = &tsl2x7x_read_raw,
1742 .write_raw = &tsl2x7x_write_raw,
1743 .read_event_value = &tsl2x7x_read_thresh,
1744 .write_event_value = &tsl2x7x_write_thresh,
1745 .read_event_config = &tsl2x7x_read_interrupt_config,
1746 .write_event_config = &tsl2x7x_write_interrupt_config,
1749 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
1750 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1751 .driver_module = THIS_MODULE,
1752 .read_raw = &tsl2x7x_read_raw,
1753 .write_raw = &tsl2x7x_write_raw,
1754 .read_event_value = &tsl2x7x_read_thresh,
1755 .write_event_value = &tsl2x7x_write_thresh,
1756 .read_event_config = &tsl2x7x_read_interrupt_config,
1757 .write_event_config = &tsl2x7x_write_interrupt_config,
1760 .attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
1761 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1762 .driver_module = THIS_MODULE,
1763 .read_raw = &tsl2x7x_read_raw,
1764 .write_raw = &tsl2x7x_write_raw,
1765 .read_event_value = &tsl2x7x_read_thresh,
1766 .write_event_value = &tsl2x7x_write_thresh,
1767 .read_event_config = &tsl2x7x_read_interrupt_config,
1768 .write_event_config = &tsl2x7x_write_interrupt_config,
1771 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
1772 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1773 .driver_module = THIS_MODULE,
1774 .read_raw = &tsl2x7x_read_raw,
1775 .write_raw = &tsl2x7x_write_raw,
1776 .read_event_value = &tsl2x7x_read_thresh,
1777 .write_event_value = &tsl2x7x_write_thresh,
1778 .read_event_config = &tsl2x7x_read_interrupt_config,
1779 .write_event_config = &tsl2x7x_write_interrupt_config,
1783 static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
1790 .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
1792 .type = IIO_INTENSITY,
1795 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1796 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
1797 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
1798 .event_mask = TSL2X7X_EVENT_MASK
1800 .type = IIO_INTENSITY,
1805 .chan_table_elements = 3,
1806 .info = &tsl2X7X_device_info[ALS],
1811 .type = IIO_PROXIMITY,
1814 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
1815 .event_mask = TSL2X7X_EVENT_MASK
1818 .chan_table_elements = 1,
1819 .info = &tsl2X7X_device_info[PRX],
1827 .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT
1829 .type = IIO_INTENSITY,
1832 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1833 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
1834 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
1835 .event_mask = TSL2X7X_EVENT_MASK
1837 .type = IIO_INTENSITY,
1840 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
1842 .type = IIO_PROXIMITY,
1845 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
1846 .event_mask = TSL2X7X_EVENT_MASK
1849 .chan_table_elements = 4,
1850 .info = &tsl2X7X_device_info[ALSPRX],
1855 .type = IIO_PROXIMITY,
1858 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1859 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
1860 .event_mask = TSL2X7X_EVENT_MASK
1863 .chan_table_elements = 1,
1864 .info = &tsl2X7X_device_info[PRX2],
1872 .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
1874 .type = IIO_INTENSITY,
1877 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1878 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
1879 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
1880 .event_mask = TSL2X7X_EVENT_MASK
1882 .type = IIO_INTENSITY,
1885 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
1887 .type = IIO_PROXIMITY,
1890 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
1891 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
1892 .event_mask = TSL2X7X_EVENT_MASK
1895 .chan_table_elements = 4,
1896 .info = &tsl2X7X_device_info[ALSPRX2],
1900 static int tsl2x7x_probe(struct i2c_client *clientp,
1901 const struct i2c_device_id *id)
1904 unsigned char device_id;
1905 struct iio_dev *indio_dev;
1906 struct tsl2X7X_chip *chip;
1908 indio_dev = iio_device_alloc(sizeof(*chip));
1912 chip = iio_priv(indio_dev);
1913 chip->client = clientp;
1914 i2c_set_clientdata(clientp, indio_dev);
1916 ret = tsl2x7x_i2c_read(chip->client,
1917 TSL2X7X_CHIPID, &device_id);
1921 if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
1922 (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
1923 dev_info(&chip->client->dev,
1924 "%s: i2c device found does not match expected id\n",
1929 ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
1931 dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n",
1936 /* ALS and PROX functions can be invoked via user space poll
1937 * or H/W interrupt. If busy return last sample. */
1938 mutex_init(&chip->als_mutex);
1939 mutex_init(&chip->prox_mutex);
1941 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
1942 chip->pdata = clientp->dev.platform_data;
1943 chip->id = id->driver_data;
1945 &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
1947 indio_dev->info = chip->chip_info->info;
1948 indio_dev->dev.parent = &clientp->dev;
1949 indio_dev->modes = INDIO_DIRECT_MODE;
1950 indio_dev->name = chip->client->name;
1951 indio_dev->channels = chip->chip_info->channel;
1952 indio_dev->num_channels = chip->chip_info->chan_table_elements;
1955 ret = request_threaded_irq(clientp->irq,
1957 &tsl2x7x_event_handler,
1958 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
1962 dev_err(&clientp->dev,
1963 "%s: irq request failed", __func__);
1968 /* Load up the defaults */
1969 tsl2x7x_defaults(chip);
1970 /* Make sure the chip is on */
1971 tsl2x7x_chip_on(indio_dev);
1973 ret = iio_device_register(indio_dev);
1975 dev_err(&clientp->dev,
1976 "%s: iio registration failed\n", __func__);
1980 dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
1986 free_irq(clientp->irq, indio_dev);
1988 iio_device_free(indio_dev);
1993 static int tsl2x7x_suspend(struct device *dev)
1995 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1996 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1999 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
2000 ret = tsl2x7x_chip_off(indio_dev);
2001 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
2004 if (chip->pdata && chip->pdata->platform_power) {
2005 pm_message_t pmm = {PM_EVENT_SUSPEND};
2006 chip->pdata->platform_power(dev, pmm);
2012 static int tsl2x7x_resume(struct device *dev)
2014 struct iio_dev *indio_dev = dev_get_drvdata(dev);
2015 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
2018 if (chip->pdata && chip->pdata->platform_power) {
2019 pm_message_t pmm = {PM_EVENT_RESUME};
2020 chip->pdata->platform_power(dev, pmm);
2023 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
2024 ret = tsl2x7x_chip_on(indio_dev);
2029 static int tsl2x7x_remove(struct i2c_client *client)
2031 struct iio_dev *indio_dev = i2c_get_clientdata(client);
2033 tsl2x7x_chip_off(indio_dev);
2035 iio_device_unregister(indio_dev);
2037 free_irq(client->irq, indio_dev);
2039 iio_device_free(indio_dev);
2044 static struct i2c_device_id tsl2x7x_idtable[] = {
2045 { "tsl2571", tsl2571 },
2046 { "tsl2671", tsl2671 },
2047 { "tmd2671", tmd2671 },
2048 { "tsl2771", tsl2771 },
2049 { "tmd2771", tmd2771 },
2050 { "tsl2572", tsl2572 },
2051 { "tsl2672", tsl2672 },
2052 { "tmd2672", tmd2672 },
2053 { "tsl2772", tsl2772 },
2054 { "tmd2772", tmd2772 },
2058 MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
2060 static const struct dev_pm_ops tsl2x7x_pm_ops = {
2061 .suspend = tsl2x7x_suspend,
2062 .resume = tsl2x7x_resume,
2065 /* Driver definition */
2066 static struct i2c_driver tsl2x7x_driver = {
2069 .pm = &tsl2x7x_pm_ops,
2071 .id_table = tsl2x7x_idtable,
2072 .probe = tsl2x7x_probe,
2073 .remove = tsl2x7x_remove,
2076 module_i2c_driver(tsl2x7x_driver);
2078 MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
2079 MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
2080 MODULE_LICENSE("GPL");