2 * Device driver for monitoring ambient light intensity in (lux)
3 * and proximity detection (prox) within the TAOS TSL2X7X family of devices.
5 * Copyright (c) 2012, TAOS Corporation.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 #include <linux/kernel.h>
23 #include <linux/i2c.h>
24 #include <linux/errno.h>
25 #include <linux/delay.h>
26 #include <linux/mutex.h>
27 #include <linux/interrupt.h>
28 #include <linux/slab.h>
29 #include <linux/module.h>
30 #include <linux/iio/events.h>
31 #include <linux/iio/iio.h>
32 #include <linux/iio/sysfs.h>
36 #define PROX_STAT_CAL 0
37 #define PROX_STAT_SAMP 1
38 #define MAX_SAMPLES_CAL 200
40 /* TSL2X7X Device ID */
41 #define TRITON_ID 0x00
42 #define SWORDFISH_ID 0x30
43 #define HALIBUT_ID 0x20
45 /* Lux calculation constants */
46 #define TSL2X7X_LUX_CALC_OVER_FLOW 65535
48 /* TAOS Register definitions - note:
49 * depending on device, some of these register are not used and the
50 * register address is benign.
52 /* 2X7X register offsets */
53 #define TSL2X7X_MAX_CONFIG_REG 16
55 /* Device Registers and Masks */
56 #define TSL2X7X_CNTRL 0x00
57 #define TSL2X7X_ALS_TIME 0X01
58 #define TSL2X7X_PRX_TIME 0x02
59 #define TSL2X7X_WAIT_TIME 0x03
60 #define TSL2X7X_ALS_MINTHRESHLO 0X04
61 #define TSL2X7X_ALS_MINTHRESHHI 0X05
62 #define TSL2X7X_ALS_MAXTHRESHLO 0X06
63 #define TSL2X7X_ALS_MAXTHRESHHI 0X07
64 #define TSL2X7X_PRX_MINTHRESHLO 0X08
65 #define TSL2X7X_PRX_MINTHRESHHI 0X09
66 #define TSL2X7X_PRX_MAXTHRESHLO 0X0A
67 #define TSL2X7X_PRX_MAXTHRESHHI 0X0B
68 #define TSL2X7X_PERSISTENCE 0x0C
69 #define TSL2X7X_PRX_CONFIG 0x0D
70 #define TSL2X7X_PRX_COUNT 0x0E
71 #define TSL2X7X_GAIN 0x0F
72 #define TSL2X7X_NOTUSED 0x10
73 #define TSL2X7X_REVID 0x11
74 #define TSL2X7X_CHIPID 0x12
75 #define TSL2X7X_STATUS 0x13
76 #define TSL2X7X_ALS_CHAN0LO 0x14
77 #define TSL2X7X_ALS_CHAN0HI 0x15
78 #define TSL2X7X_ALS_CHAN1LO 0x16
79 #define TSL2X7X_ALS_CHAN1HI 0x17
80 #define TSL2X7X_PRX_LO 0x18
81 #define TSL2X7X_PRX_HI 0x19
83 /* tsl2X7X cmd reg masks */
84 #define TSL2X7X_CMD_REG 0x80
85 #define TSL2X7X_CMD_SPL_FN 0x60
87 #define TSL2X7X_CMD_PROX_INT_CLR 0X05
88 #define TSL2X7X_CMD_ALS_INT_CLR 0x06
89 #define TSL2X7X_CMD_PROXALS_INT_CLR 0X07
91 /* tsl2X7X cntrl reg masks */
92 #define TSL2X7X_CNTL_ADC_ENBL 0x02
93 #define TSL2X7X_CNTL_PWR_ON 0x01
95 /* tsl2X7X status reg masks */
96 #define TSL2X7X_STA_ADC_VALID 0x01
97 #define TSL2X7X_STA_PRX_VALID 0x02
98 #define TSL2X7X_STA_ADC_PRX_VALID (TSL2X7X_STA_ADC_VALID |\
99 TSL2X7X_STA_PRX_VALID)
100 #define TSL2X7X_STA_ALS_INTR 0x10
101 #define TSL2X7X_STA_PRX_INTR 0x20
103 /* tsl2X7X cntrl reg masks */
104 #define TSL2X7X_CNTL_REG_CLEAR 0x00
105 #define TSL2X7X_CNTL_PROX_INT_ENBL 0X20
106 #define TSL2X7X_CNTL_ALS_INT_ENBL 0X10
107 #define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08
108 #define TSL2X7X_CNTL_PROX_DET_ENBL 0X04
109 #define TSL2X7X_CNTL_PWRON 0x01
110 #define TSL2X7X_CNTL_ALSPON_ENBL 0x03
111 #define TSL2X7X_CNTL_INTALSPON_ENBL 0x13
112 #define TSL2X7X_CNTL_PROXPON_ENBL 0x0F
113 #define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F
115 /*Prox diode to use */
116 #define TSL2X7X_DIODE0 0x10
117 #define TSL2X7X_DIODE1 0x20
118 #define TSL2X7X_DIODE_BOTH 0x30
121 #define TSL2X7X_mA100 0x00
122 #define TSL2X7X_mA50 0x40
123 #define TSL2X7X_mA25 0x80
124 #define TSL2X7X_mA13 0xD0
125 #define TSL2X7X_MAX_TIMER_CNT (0xFF)
127 #define TSL2X7X_MIN_ITIME 3
129 /* TAOS txx2x7x Device family members */
144 TSL2X7X_CHIP_UNKNOWN = 0,
145 TSL2X7X_CHIP_WORKING = 1,
146 TSL2X7X_CHIP_SUSPENDED = 2
149 struct tsl2x7x_parse_result {
154 /* Per-device data */
155 struct tsl2x7x_als_info {
161 struct tsl2x7x_prox_stat {
165 unsigned long stddev;
168 struct tsl2x7x_chip_info {
169 int chan_table_elements;
170 struct iio_chan_spec channel[4];
171 const struct iio_info *info;
174 struct tsl2X7X_chip {
176 struct mutex prox_mutex;
177 struct mutex als_mutex;
178 struct i2c_client *client;
180 struct tsl2x7x_als_info als_cur_info;
181 struct tsl2x7x_settings tsl2x7x_settings;
182 struct tsl2X7X_platform_data *pdata;
185 int tsl2x7x_chip_status;
186 u8 tsl2x7x_config[TSL2X7X_MAX_CONFIG_REG];
187 const struct tsl2x7x_chip_info *chip_info;
188 const struct iio_info *info;
190 /* This structure is intentionally large to accommodate
191 * updates via sysfs. */
192 /* Sized to 9 = max 8 segments + 1 termination segment */
193 struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_TABLE_SIZE];
196 /* Different devices require different coefficents */
197 static const struct tsl2x7x_lux tsl2x71_lux_table[] = {
198 { 14461, 611, 1211 },
203 static const struct tsl2x7x_lux tmd2x71_lux_table[] = {
209 static const struct tsl2x7x_lux tsl2x72_lux_table[] = {
215 static const struct tsl2x7x_lux tmd2x72_lux_table[] = {
221 static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = {
222 [tsl2571] = tsl2x71_lux_table,
223 [tsl2671] = tsl2x71_lux_table,
224 [tmd2671] = tmd2x71_lux_table,
225 [tsl2771] = tsl2x71_lux_table,
226 [tmd2771] = tmd2x71_lux_table,
227 [tsl2572] = tsl2x72_lux_table,
228 [tsl2672] = tsl2x72_lux_table,
229 [tmd2672] = tmd2x72_lux_table,
230 [tsl2772] = tsl2x72_lux_table,
231 [tmd2772] = tmd2x72_lux_table,
234 static const struct tsl2x7x_settings tsl2x7x_default_settings = {
235 .als_time = 219, /* 101 ms */
237 .prx_time = 254, /* 5.4 ms */
241 .als_gain_trim = 1000,
242 .als_cal_target = 150,
243 .als_thresh_low = 200,
244 .als_thresh_high = 256,
248 .prox_thres_high = 512,
249 .prox_max_samples_cal = 30,
250 .prox_pulse_count = 8
253 static const s16 tsl2X7X_als_gainadj[] = {
260 static const s16 tsl2X7X_prx_gainadj[] = {
267 /* Channel variations */
276 static const u8 device_channel_config[] = {
290 * tsl2x7x_i2c_read() - Read a byte from a register.
291 * @client: i2c client
292 * @reg: device register to read from
293 * @*val: pointer to location to store register contents.
297 tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
301 /* select register to write */
302 ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
304 dev_err(&client->dev, "%s: failed to write register %x\n"
310 ret = i2c_smbus_read_byte(client);
314 dev_err(&client->dev, "%s: failed to read register %x\n"
321 * tsl2x7x_get_lux() - Reads and calculates current lux value.
322 * @indio_dev: pointer to IIO device
324 * The raw ch0 and ch1 values of the ambient light sensed in the last
325 * integration cycle are read from the device.
326 * Time scale factor array values are adjusted based on the integration time.
327 * The raw values are multiplied by a scale factor, and device gain is obtained
328 * using gain index. Limit checks are done next, then the ratio of a multiple
329 * of ch1 value, to the ch0 value, is calculated. Array tsl2x7x_device_lux[]
330 * is then scanned to find the first ratio value that is just above the ratio
331 * we just calculated. The ch0 and ch1 multiplier constants in the array are
332 * then used along with the time scale factor array values, to calculate the
335 static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
337 u16 ch0, ch1; /* separated ch0/ch1 data from device */
338 u32 lux; /* raw lux calculated from device data */
342 struct tsl2x7x_lux *p;
343 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
348 if (mutex_trylock(&chip->als_mutex) == 0)
349 return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
351 if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
352 /* device is not enabled */
353 dev_err(&chip->client->dev, "%s: device is not enabled\n",
359 ret = tsl2x7x_i2c_read(chip->client,
360 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
362 dev_err(&chip->client->dev,
363 "%s: Failed to read STATUS Reg\n", __func__);
366 /* is data new & valid */
367 if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
368 dev_err(&chip->client->dev,
369 "%s: data not valid yet\n", __func__);
370 ret = chip->als_cur_info.lux; /* return LAST VALUE */
374 for (i = 0; i < 4; i++) {
375 ret = tsl2x7x_i2c_read(chip->client,
376 (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
379 dev_err(&chip->client->dev,
380 "%s: failed to read. err=%x\n", __func__, ret);
385 /* clear any existing interrupt status */
386 ret = i2c_smbus_write_byte(chip->client,
389 TSL2X7X_CMD_ALS_INT_CLR));
391 dev_err(&chip->client->dev,
392 "%s: i2c_write_command failed - err = %d\n",
394 goto out_unlock; /* have no data, so return failure */
397 /* extract ALS/lux data */
398 ch0 = le16_to_cpup((const __le16 *)&buf[0]);
399 ch1 = le16_to_cpup((const __le16 *)&buf[2]);
401 chip->als_cur_info.als_ch0 = ch0;
402 chip->als_cur_info.als_ch1 = ch1;
404 if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) {
405 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
410 /* have no data, so return LAST VALUE */
411 ret = chip->als_cur_info.lux;
414 /* calculate ratio */
415 ratio = (ch1 << 15) / ch0;
416 /* convert to unscaled lux using the pointer to the table */
417 p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
418 while (p->ratio != 0 && p->ratio < ratio)
424 ch0lux = DIV_ROUND_UP((ch0 * p->ch0),
425 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
426 ch1lux = DIV_ROUND_UP((ch1 * p->ch1),
427 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
428 lux = ch0lux - ch1lux;
431 /* note: lux is 31 bit max at this point */
432 if (ch1lux > ch0lux) {
433 dev_dbg(&chip->client->dev, "ch1lux > ch0lux-return last value\n");
434 ret = chip->als_cur_info.lux;
438 /* adjust for active time scale */
439 if (chip->als_time_scale == 0)
442 lux = (lux + (chip->als_time_scale >> 1)) /
443 chip->als_time_scale;
445 /* adjust for active gain scale
446 * The tsl2x7x_device_lux tables have a factor of 256 built-in.
447 * User-specified gain provides a multiplier.
448 * Apply user-specified gain before shifting right to retain precision.
449 * Use 64 bits to avoid overflow on multiplication.
450 * Then go back to 32 bits before division to avoid using div_u64().
454 lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
457 lux = (lux + 500) / 1000;
459 if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */
460 lux = TSL2X7X_LUX_CALC_OVER_FLOW;
462 /* Update the structure with the latest lux. */
464 chip->als_cur_info.lux = lux;
468 mutex_unlock(&chip->als_mutex);
474 * tsl2x7x_get_prox() - Reads proximity data registers and updates
477 * @indio_dev: pointer to IIO device
479 static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
485 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
487 if (mutex_trylock(&chip->prox_mutex) == 0) {
488 dev_err(&chip->client->dev,
489 "%s: Can't get prox mutex\n", __func__);
493 ret = tsl2x7x_i2c_read(chip->client,
494 (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
496 dev_err(&chip->client->dev,
497 "%s: i2c err=%d\n", __func__, ret);
507 if (!(status & TSL2X7X_STA_ADC_VALID))
515 if (!(status & TSL2X7X_STA_PRX_VALID))
520 for (i = 0; i < 2; i++) {
521 ret = tsl2x7x_i2c_read(chip->client,
523 (TSL2X7X_PRX_LO + i)), &chdata[i]);
529 le16_to_cpup((const __le16 *)&chdata[0]);
533 mutex_unlock(&chip->prox_mutex);
535 return chip->prox_data;
539 * tsl2x7x_defaults() - Populates the device nominal operating parameters
540 * with those provided by a 'platform' data struct or
541 * with prefined defaults.
543 * @chip: pointer to device structure.
545 static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
547 /* If Operational settings defined elsewhere.. */
548 if (chip->pdata && chip->pdata->platform_default_settings)
549 memcpy(&(chip->tsl2x7x_settings),
550 chip->pdata->platform_default_settings,
551 sizeof(tsl2x7x_default_settings));
553 memcpy(&(chip->tsl2x7x_settings),
554 &tsl2x7x_default_settings,
555 sizeof(tsl2x7x_default_settings));
557 /* Load up the proper lux table. */
558 if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0)
559 memcpy(chip->tsl2x7x_device_lux,
560 chip->pdata->platform_lux_table,
561 sizeof(chip->pdata->platform_lux_table));
563 memcpy(chip->tsl2x7x_device_lux,
564 (struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
565 MAX_DEFAULT_TABLE_BYTES);
569 * tsl2x7x_als_calibrate() - Obtain single reading and calculate
572 * @indio_dev: pointer to IIO device
574 static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
576 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
582 ret = i2c_smbus_write_byte(chip->client,
583 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
585 dev_err(&chip->client->dev,
586 "%s: failed to write CNTRL register, ret=%d\n",
591 reg_val = i2c_smbus_read_byte(chip->client);
592 if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
593 != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
594 dev_err(&chip->client->dev,
595 "%s: failed: ADC not enabled\n", __func__);
599 ret = i2c_smbus_write_byte(chip->client,
600 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
602 dev_err(&chip->client->dev,
603 "%s: failed to write ctrl reg: ret=%d\n",
608 reg_val = i2c_smbus_read_byte(chip->client);
609 if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
610 dev_err(&chip->client->dev,
611 "%s: failed: STATUS - ADC not valid.\n", __func__);
615 lux_val = tsl2x7x_get_lux(indio_dev);
617 dev_err(&chip->client->dev,
618 "%s: failed to get lux\n", __func__);
622 gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target)
623 * chip->tsl2x7x_settings.als_gain_trim) / lux_val);
624 if ((gain_trim_val < 250) || (gain_trim_val > 4000))
627 chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
628 dev_info(&chip->client->dev,
629 "%s als_calibrate completed\n", chip->client->name);
631 return (int) gain_trim_val;
634 static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
642 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
645 if (chip->pdata && chip->pdata->power_on)
646 chip->pdata->power_on(indio_dev);
648 /* Non calculated parameters */
649 chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
650 chip->tsl2x7x_settings.prx_time;
651 chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
652 chip->tsl2x7x_settings.wait_time;
653 chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
654 chip->tsl2x7x_settings.prox_config;
656 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
657 (chip->tsl2x7x_settings.als_thresh_low) & 0xFF;
658 chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
659 (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF;
660 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
661 (chip->tsl2x7x_settings.als_thresh_high) & 0xFF;
662 chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
663 (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF;
664 chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
665 chip->tsl2x7x_settings.persistence;
667 chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
668 chip->tsl2x7x_settings.prox_pulse_count;
669 chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
670 (chip->tsl2x7x_settings.prox_thres_low) & 0xFF;
671 chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHHI] =
672 (chip->tsl2x7x_settings.prox_thres_low >> 8) & 0xFF;
673 chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
674 (chip->tsl2x7x_settings.prox_thres_high) & 0xFF;
675 chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHHI] =
676 (chip->tsl2x7x_settings.prox_thres_high >> 8) & 0xFF;
678 /* and make sure we're not already on */
679 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
680 /* if forcing a register update - turn off, then on */
681 dev_info(&chip->client->dev, "device is already enabled\n");
685 /* determine als integration register */
686 als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
688 als_count = 1; /* ensure at least one cycle */
690 /* convert back to time (encompasses overrides) */
691 als_time = (als_count * 27 + 5) / 10;
692 chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
694 /* Set the gain based on tsl2x7x_settings struct */
695 chip->tsl2x7x_config[TSL2X7X_GAIN] =
696 (chip->tsl2x7x_settings.als_gain |
697 (TSL2X7X_mA100 | TSL2X7X_DIODE1)
698 | ((chip->tsl2x7x_settings.prox_gain) << 2));
700 /* set chip struct re scaling and saturation */
701 chip->als_saturation = als_count * 922; /* 90% of full scale */
702 chip->als_time_scale = (als_time + 25) / 50;
704 /* TSL2X7X Specific power-on / adc enable sequence
705 * Power on the device 1st. */
706 utmp = TSL2X7X_CNTL_PWR_ON;
707 ret = i2c_smbus_write_byte_data(chip->client,
708 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
710 dev_err(&chip->client->dev,
711 "%s: failed on CNTRL reg.\n", __func__);
715 /* Use the following shadow copy for our delay before enabling ADC.
716 * Write all the registers. */
717 for (i = 0, dev_reg = chip->tsl2x7x_config;
718 i < TSL2X7X_MAX_CONFIG_REG; i++) {
719 ret = i2c_smbus_write_byte_data(chip->client,
720 TSL2X7X_CMD_REG + i, *dev_reg++);
722 dev_err(&chip->client->dev,
723 "%s: failed on write to reg %d.\n", __func__, i);
728 mdelay(3); /* Power-on settling time */
730 /* NOW enable the ADC
731 * initialize the desired mode of operation */
732 utmp = TSL2X7X_CNTL_PWR_ON |
733 TSL2X7X_CNTL_ADC_ENBL |
734 TSL2X7X_CNTL_PROX_DET_ENBL;
735 ret = i2c_smbus_write_byte_data(chip->client,
736 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
738 dev_err(&chip->client->dev,
739 "%s: failed on 2nd CTRL reg.\n", __func__);
743 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
745 if (chip->tsl2x7x_settings.interrupts_en != 0) {
746 dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
748 reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
749 if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
750 (chip->tsl2x7x_settings.interrupts_en == 0x30))
751 reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
753 reg_val |= chip->tsl2x7x_settings.interrupts_en;
754 ret = i2c_smbus_write_byte_data(chip->client,
755 (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
757 dev_err(&chip->client->dev,
758 "%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
761 /* Clear out any initial interrupts */
762 ret = i2c_smbus_write_byte(chip->client,
763 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
764 TSL2X7X_CMD_PROXALS_INT_CLR);
766 dev_err(&chip->client->dev,
767 "%s: Failed to clear Int status\n",
776 static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
779 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
781 /* turn device off */
782 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
784 ret = i2c_smbus_write_byte_data(chip->client,
785 TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
787 if (chip->pdata && chip->pdata->power_off)
788 chip->pdata->power_off(chip->client);
794 * tsl2x7x_invoke_change
795 * @indio_dev: pointer to IIO device
797 * Obtain and lock both ALS and PROX resources,
798 * determine and save device state (On/Off),
799 * cycle device to implement updated parameter,
800 * put device back into proper state, and unlock
804 int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
806 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
807 int device_status = chip->tsl2x7x_chip_status;
809 mutex_lock(&chip->als_mutex);
810 mutex_lock(&chip->prox_mutex);
812 if (device_status == TSL2X7X_CHIP_WORKING)
813 tsl2x7x_chip_off(indio_dev);
815 tsl2x7x_chip_on(indio_dev);
817 if (device_status != TSL2X7X_CHIP_WORKING)
818 tsl2x7x_chip_off(indio_dev);
820 mutex_unlock(&chip->prox_mutex);
821 mutex_unlock(&chip->als_mutex);
827 void tsl2x7x_prox_calculate(int *data, int length,
828 struct tsl2x7x_prox_stat *statP)
838 statP->min = INT_MAX;
839 statP->max = INT_MIN;
840 for (i = 0; i < length; i++) {
841 sample_sum += data[i];
842 statP->min = min(statP->min, data[i]);
843 statP->max = max(statP->max, data[i]);
846 statP->mean = sample_sum / length;
848 for (i = 0; i < length; i++) {
849 tmp = data[i] - statP->mean;
850 sample_sum += tmp * tmp;
852 statP->stddev = int_sqrt((long)sample_sum)/length;
856 * tsl2x7x_prox_cal() - Calculates std. and sets thresholds.
857 * @indio_dev: pointer to IIO device
859 * Calculates a standard deviation based on the samples,
860 * and sets the threshold accordingly.
862 static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
864 int prox_history[MAX_SAMPLES_CAL + 1];
866 struct tsl2x7x_prox_stat prox_stat_data[2];
867 struct tsl2x7x_prox_stat *calP;
868 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
870 u8 current_state = chip->tsl2x7x_chip_status;
872 if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) {
873 dev_err(&chip->client->dev,
874 "%s: max prox samples cal is too big: %d\n",
875 __func__, chip->tsl2x7x_settings.prox_max_samples_cal);
876 chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
879 /* have to stop to change settings */
880 tsl2x7x_chip_off(indio_dev);
882 /* Enable proximity detection save just in case prox not wanted yet*/
883 tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
884 chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL;
886 /*turn on device if not already on*/
887 tsl2x7x_chip_on(indio_dev);
889 /*gather the samples*/
890 for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
892 tsl2x7x_get_prox(indio_dev);
893 prox_history[i] = chip->prox_data;
894 dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
898 tsl2x7x_chip_off(indio_dev);
899 calP = &prox_stat_data[PROX_STAT_CAL];
900 tsl2x7x_prox_calculate(prox_history,
901 chip->tsl2x7x_settings.prox_max_samples_cal, calP);
902 chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean;
904 dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
905 calP->min, calP->mean, calP->max);
906 dev_info(&chip->client->dev,
907 "%s proximity threshold set to %d\n",
908 chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
910 /* back to the way they were */
911 chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
912 if (current_state == TSL2X7X_CHIP_WORKING)
913 tsl2x7x_chip_on(indio_dev);
916 static ssize_t tsl2x7x_power_state_show(struct device *dev,
917 struct device_attribute *attr, char *buf)
919 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
921 return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
924 static ssize_t tsl2x7x_power_state_store(struct device *dev,
925 struct device_attribute *attr, const char *buf, size_t len)
927 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
930 if (strtobool(buf, &value))
934 tsl2x7x_chip_on(indio_dev);
936 tsl2x7x_chip_off(indio_dev);
941 static ssize_t tsl2x7x_gain_available_show(struct device *dev,
942 struct device_attribute *attr, char *buf)
944 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
952 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
955 return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
958 static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev,
959 struct device_attribute *attr, char *buf)
961 return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
964 static ssize_t tsl2x7x_als_time_show(struct device *dev,
965 struct device_attribute *attr, char *buf)
967 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
970 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
971 z = y * TSL2X7X_MIN_ITIME;
975 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
978 static ssize_t tsl2x7x_als_time_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);
982 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
983 struct tsl2x7x_parse_result result;
986 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
991 chip->tsl2x7x_settings.als_time =
992 (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract);
994 dev_info(&chip->client->dev, "%s: als time = %d",
995 __func__, chip->tsl2x7x_settings.als_time);
997 tsl2x7x_invoke_change(indio_dev);
999 return IIO_VAL_INT_PLUS_MICRO;
1002 static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
1005 static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
1006 struct device_attribute *attr, char *buf)
1008 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1010 return snprintf(buf, PAGE_SIZE, "%d\n",
1011 chip->tsl2x7x_settings.als_cal_target);
1014 static ssize_t tsl2x7x_als_cal_target_store(struct device *dev,
1015 struct device_attribute *attr, const char *buf, size_t len)
1017 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1018 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1019 unsigned long value;
1021 if (kstrtoul(buf, 0, &value))
1025 chip->tsl2x7x_settings.als_cal_target = value;
1027 tsl2x7x_invoke_change(indio_dev);
1032 /* persistence settings */
1033 static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
1034 struct device_attribute *attr, char *buf)
1036 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1037 int y, z, filter_delay;
1039 /* Determine integration time */
1040 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1041 z = y * TSL2X7X_MIN_ITIME;
1042 filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F);
1043 y = (filter_delay / 1000);
1044 z = (filter_delay % 1000);
1046 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1049 static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
1050 struct device_attribute *attr, const char *buf, size_t len)
1052 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1053 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1054 struct tsl2x7x_parse_result result;
1055 int y, z, filter_delay;
1058 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
1062 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
1063 z = y * TSL2X7X_MIN_ITIME;
1066 DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
1068 chip->tsl2x7x_settings.persistence &= 0xF0;
1069 chip->tsl2x7x_settings.persistence |= (filter_delay & 0x0F);
1071 dev_info(&chip->client->dev, "%s: als persistence = %d",
1072 __func__, filter_delay);
1074 tsl2x7x_invoke_change(indio_dev);
1076 return IIO_VAL_INT_PLUS_MICRO;
1079 static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
1080 struct device_attribute *attr, char *buf)
1082 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1083 int y, z, filter_delay;
1085 /* Determine integration time */
1086 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1087 z = y * TSL2X7X_MIN_ITIME;
1088 filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4);
1089 y = (filter_delay / 1000);
1090 z = (filter_delay % 1000);
1092 return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
1095 static ssize_t tsl2x7x_prox_persistence_store(struct device *dev,
1096 struct device_attribute *attr, const char *buf, size_t len)
1098 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1099 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1100 struct tsl2x7x_parse_result result;
1101 int y, z, filter_delay;
1104 ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
1108 y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
1109 z = y * TSL2X7X_MIN_ITIME;
1112 DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
1114 chip->tsl2x7x_settings.persistence &= 0x0F;
1115 chip->tsl2x7x_settings.persistence |= ((filter_delay << 4) & 0xF0);
1117 dev_info(&chip->client->dev, "%s: prox persistence = %d",
1118 __func__, filter_delay);
1120 tsl2x7x_invoke_change(indio_dev);
1122 return IIO_VAL_INT_PLUS_MICRO;
1125 static ssize_t tsl2x7x_do_calibrate(struct device *dev,
1126 struct device_attribute *attr, const char *buf, size_t len)
1128 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1131 if (strtobool(buf, &value))
1135 tsl2x7x_als_calibrate(indio_dev);
1137 tsl2x7x_invoke_change(indio_dev);
1142 static ssize_t tsl2x7x_luxtable_show(struct device *dev,
1143 struct device_attribute *attr, char *buf)
1145 struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
1149 while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) {
1150 offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,",
1151 chip->tsl2x7x_device_lux[i].ratio,
1152 chip->tsl2x7x_device_lux[i].ch0,
1153 chip->tsl2x7x_device_lux[i].ch1);
1154 if (chip->tsl2x7x_device_lux[i].ratio == 0) {
1155 /* We just printed the first "0" entry.
1156 * Now get rid of the extra "," and break. */
1163 offset += snprintf(buf + offset, PAGE_SIZE, "\n");
1167 static ssize_t tsl2x7x_luxtable_store(struct device *dev,
1168 struct device_attribute *attr, const char *buf, size_t len)
1170 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1171 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1172 int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1];
1175 get_options(buf, ARRAY_SIZE(value), value);
1177 /* We now have an array of ints starting at value[1], and
1178 * enumerated by value[0].
1179 * We expect each group of three ints is one table entry,
1180 * and the last table entry is all 0.
1183 if ((n % 3) || n < 6 ||
1184 n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) {
1185 dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n);
1189 if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) {
1190 dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n);
1194 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
1195 tsl2x7x_chip_off(indio_dev);
1197 /* Zero out the table */
1198 memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));
1199 memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4));
1201 tsl2x7x_invoke_change(indio_dev);
1206 static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev,
1207 struct device_attribute *attr, const char *buf, size_t len)
1209 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1212 if (strtobool(buf, &value))
1216 tsl2x7x_prox_cal(indio_dev);
1218 tsl2x7x_invoke_change(indio_dev);
1223 static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
1224 const struct iio_chan_spec *chan,
1225 enum iio_event_type type,
1226 enum iio_event_direction dir)
1228 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1231 if (chan->type == 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,
1240 const struct iio_chan_spec *chan,
1241 enum iio_event_type type,
1242 enum iio_event_direction dir,
1245 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1247 if (chan->type == IIO_INTENSITY) {
1249 chip->tsl2x7x_settings.interrupts_en |= 0x10;
1251 chip->tsl2x7x_settings.interrupts_en &= 0x20;
1254 chip->tsl2x7x_settings.interrupts_en |= 0x20;
1256 chip->tsl2x7x_settings.interrupts_en &= 0x10;
1259 tsl2x7x_invoke_change(indio_dev);
1264 static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
1265 const struct iio_chan_spec *chan,
1266 enum iio_event_type type,
1267 enum iio_event_direction dir,
1268 enum iio_event_info info,
1271 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1273 if (chan->type == IIO_INTENSITY) {
1275 case IIO_EV_DIR_RISING:
1276 chip->tsl2x7x_settings.als_thresh_high = val;
1278 case IIO_EV_DIR_FALLING:
1279 chip->tsl2x7x_settings.als_thresh_low = val;
1286 case IIO_EV_DIR_RISING:
1287 chip->tsl2x7x_settings.prox_thres_high = val;
1289 case IIO_EV_DIR_FALLING:
1290 chip->tsl2x7x_settings.prox_thres_low = val;
1297 tsl2x7x_invoke_change(indio_dev);
1302 static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
1303 const struct iio_chan_spec *chan,
1304 enum iio_event_type type,
1305 enum iio_event_direction dir,
1306 enum iio_event_info info,
1307 int *val, int *val2)
1309 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1311 if (chan->type == IIO_INTENSITY) {
1313 case IIO_EV_DIR_RISING:
1314 *val = chip->tsl2x7x_settings.als_thresh_high;
1316 case IIO_EV_DIR_FALLING:
1317 *val = chip->tsl2x7x_settings.als_thresh_low;
1324 case IIO_EV_DIR_RISING:
1325 *val = chip->tsl2x7x_settings.prox_thres_high;
1327 case IIO_EV_DIR_FALLING:
1328 *val = chip->tsl2x7x_settings.prox_thres_low;
1338 static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
1339 struct iio_chan_spec const *chan,
1345 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1348 case IIO_CHAN_INFO_PROCESSED:
1349 switch (chan->type) {
1351 tsl2x7x_get_lux(indio_dev);
1352 *val = chip->als_cur_info.lux;
1359 case IIO_CHAN_INFO_RAW:
1360 switch (chan->type) {
1362 tsl2x7x_get_lux(indio_dev);
1363 if (chan->channel == 0)
1364 *val = chip->als_cur_info.als_ch0;
1366 *val = chip->als_cur_info.als_ch1;
1370 tsl2x7x_get_prox(indio_dev);
1371 *val = chip->prox_data;
1378 case IIO_CHAN_INFO_CALIBSCALE:
1379 if (chan->type == IIO_LIGHT)
1381 tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
1384 tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain];
1387 case IIO_CHAN_INFO_CALIBBIAS:
1388 *val = chip->tsl2x7x_settings.als_gain_trim;
1399 static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
1400 struct iio_chan_spec const *chan,
1405 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1408 case IIO_CHAN_INFO_CALIBSCALE:
1409 if (chan->type == IIO_INTENSITY) {
1412 chip->tsl2x7x_settings.als_gain = 0;
1415 chip->tsl2x7x_settings.als_gain = 1;
1418 chip->tsl2x7x_settings.als_gain = 2;
1429 chip->tsl2x7x_settings.als_gain = 3;
1440 chip->tsl2x7x_settings.als_gain = 3;
1448 chip->tsl2x7x_settings.prox_gain = 0;
1451 chip->tsl2x7x_settings.prox_gain = 1;
1454 chip->tsl2x7x_settings.prox_gain = 2;
1457 chip->tsl2x7x_settings.prox_gain = 3;
1464 case IIO_CHAN_INFO_CALIBBIAS:
1465 chip->tsl2x7x_settings.als_gain_trim = val;
1472 tsl2x7x_invoke_change(indio_dev);
1477 static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
1478 tsl2x7x_power_state_show, tsl2x7x_power_state_store);
1480 static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO,
1481 tsl2x7x_prox_gain_available_show, NULL);
1483 static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO,
1484 tsl2x7x_gain_available_show, NULL);
1486 static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR,
1487 tsl2x7x_als_time_show, tsl2x7x_als_time_store);
1489 static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR,
1490 tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
1492 static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL,
1493 tsl2x7x_do_calibrate);
1495 static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL,
1496 tsl2x7x_do_prox_calibrate);
1498 static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR,
1499 tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
1501 static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR,
1502 tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
1504 static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR,
1505 tsl2x7x_prox_persistence_show, tsl2x7x_prox_persistence_store);
1507 /* Use the default register values to identify the Taos device */
1508 static int tsl2x7x_device_id(unsigned char *id, int target)
1514 return (*id & 0xf0) == TRITON_ID;
1517 return (*id & 0xf0) == HALIBUT_ID;
1523 return (*id & 0xf0) == SWORDFISH_ID;
1529 static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
1531 struct iio_dev *indio_dev = private;
1532 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1533 s64 timestamp = iio_get_time_ns();
1537 value = i2c_smbus_read_byte_data(chip->client,
1538 TSL2X7X_CMD_REG | TSL2X7X_STATUS);
1540 /* What type of interrupt do we need to process */
1541 if (value & TSL2X7X_STA_PRX_INTR) {
1542 tsl2x7x_get_prox(indio_dev); /* freshen data for ABI */
1543 iio_push_event(indio_dev,
1544 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
1551 if (value & TSL2X7X_STA_ALS_INTR) {
1552 tsl2x7x_get_lux(indio_dev); /* freshen data for ABI */
1553 iio_push_event(indio_dev,
1554 IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
1560 /* Clear interrupt now that we have handled it. */
1561 ret = i2c_smbus_write_byte(chip->client,
1562 TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
1563 TSL2X7X_CMD_PROXALS_INT_CLR);
1565 dev_err(&chip->client->dev,
1566 "%s: Failed to clear irq from event handler. err = %d\n",
1572 static struct attribute *tsl2x7x_ALS_device_attrs[] = {
1573 &dev_attr_power_state.attr,
1574 &dev_attr_in_illuminance0_calibscale_available.attr,
1575 &dev_attr_in_illuminance0_integration_time.attr,
1576 &iio_const_attr_in_illuminance0_integration_time_available\
1578 &dev_attr_in_illuminance0_target_input.attr,
1579 &dev_attr_in_illuminance0_calibrate.attr,
1580 &dev_attr_in_illuminance0_lux_table.attr,
1584 static struct attribute *tsl2x7x_PRX_device_attrs[] = {
1585 &dev_attr_power_state.attr,
1586 &dev_attr_in_proximity0_calibrate.attr,
1590 static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
1591 &dev_attr_power_state.attr,
1592 &dev_attr_in_illuminance0_calibscale_available.attr,
1593 &dev_attr_in_illuminance0_integration_time.attr,
1594 &iio_const_attr_in_illuminance0_integration_time_available\
1596 &dev_attr_in_illuminance0_target_input.attr,
1597 &dev_attr_in_illuminance0_calibrate.attr,
1598 &dev_attr_in_illuminance0_lux_table.attr,
1599 &dev_attr_in_proximity0_calibrate.attr,
1603 static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
1604 &dev_attr_power_state.attr,
1605 &dev_attr_in_proximity0_calibrate.attr,
1606 &dev_attr_in_proximity0_calibscale_available.attr,
1610 static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
1611 &dev_attr_power_state.attr,
1612 &dev_attr_in_illuminance0_calibscale_available.attr,
1613 &dev_attr_in_illuminance0_integration_time.attr,
1614 &iio_const_attr_in_illuminance0_integration_time_available\
1616 &dev_attr_in_illuminance0_target_input.attr,
1617 &dev_attr_in_illuminance0_calibrate.attr,
1618 &dev_attr_in_illuminance0_lux_table.attr,
1619 &dev_attr_in_proximity0_calibrate.attr,
1620 &dev_attr_in_proximity0_calibscale_available.attr,
1624 static struct attribute *tsl2X7X_ALS_event_attrs[] = {
1625 &dev_attr_in_intensity0_thresh_period.attr,
1628 static struct attribute *tsl2X7X_PRX_event_attrs[] = {
1629 &dev_attr_in_proximity0_thresh_period.attr,
1633 static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
1634 &dev_attr_in_intensity0_thresh_period.attr,
1635 &dev_attr_in_proximity0_thresh_period.attr,
1639 static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
1641 .attrs = tsl2x7x_ALS_device_attrs,
1644 .attrs = tsl2x7x_PRX_device_attrs,
1647 .attrs = tsl2x7x_ALSPRX_device_attrs,
1650 .attrs = tsl2x7x_PRX2_device_attrs,
1653 .attrs = tsl2x7x_ALSPRX2_device_attrs,
1657 static struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
1659 .attrs = tsl2X7X_ALS_event_attrs,
1663 .attrs = tsl2X7X_PRX_event_attrs,
1667 .attrs = tsl2X7X_ALSPRX_event_attrs,
1672 static const struct iio_info tsl2X7X_device_info[] = {
1674 .attrs = &tsl2X7X_device_attr_group_tbl[ALS],
1675 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALS],
1676 .driver_module = THIS_MODULE,
1677 .read_raw = &tsl2x7x_read_raw,
1678 .write_raw = &tsl2x7x_write_raw,
1679 .read_event_value = &tsl2x7x_read_thresh,
1680 .write_event_value = &tsl2x7x_write_thresh,
1681 .read_event_config = &tsl2x7x_read_interrupt_config,
1682 .write_event_config = &tsl2x7x_write_interrupt_config,
1685 .attrs = &tsl2X7X_device_attr_group_tbl[PRX],
1686 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1687 .driver_module = THIS_MODULE,
1688 .read_raw = &tsl2x7x_read_raw,
1689 .write_raw = &tsl2x7x_write_raw,
1690 .read_event_value = &tsl2x7x_read_thresh,
1691 .write_event_value = &tsl2x7x_write_thresh,
1692 .read_event_config = &tsl2x7x_read_interrupt_config,
1693 .write_event_config = &tsl2x7x_write_interrupt_config,
1696 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
1697 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1698 .driver_module = THIS_MODULE,
1699 .read_raw = &tsl2x7x_read_raw,
1700 .write_raw = &tsl2x7x_write_raw,
1701 .read_event_value = &tsl2x7x_read_thresh,
1702 .write_event_value = &tsl2x7x_write_thresh,
1703 .read_event_config = &tsl2x7x_read_interrupt_config,
1704 .write_event_config = &tsl2x7x_write_interrupt_config,
1707 .attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
1708 .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
1709 .driver_module = THIS_MODULE,
1710 .read_raw = &tsl2x7x_read_raw,
1711 .write_raw = &tsl2x7x_write_raw,
1712 .read_event_value = &tsl2x7x_read_thresh,
1713 .write_event_value = &tsl2x7x_write_thresh,
1714 .read_event_config = &tsl2x7x_read_interrupt_config,
1715 .write_event_config = &tsl2x7x_write_interrupt_config,
1718 .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
1719 .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
1720 .driver_module = THIS_MODULE,
1721 .read_raw = &tsl2x7x_read_raw,
1722 .write_raw = &tsl2x7x_write_raw,
1723 .read_event_value = &tsl2x7x_read_thresh,
1724 .write_event_value = &tsl2x7x_write_thresh,
1725 .read_event_config = &tsl2x7x_read_interrupt_config,
1726 .write_event_config = &tsl2x7x_write_interrupt_config,
1730 static const struct iio_event_spec tsl2x7x_events[] = {
1732 .type = IIO_EV_TYPE_THRESH,
1733 .dir = IIO_EV_DIR_RISING,
1734 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1735 BIT(IIO_EV_INFO_ENABLE),
1737 .type = IIO_EV_TYPE_THRESH,
1738 .dir = IIO_EV_DIR_FALLING,
1739 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1740 BIT(IIO_EV_INFO_ENABLE),
1744 static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
1751 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1753 .type = IIO_INTENSITY,
1756 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1757 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1758 BIT(IIO_CHAN_INFO_CALIBBIAS),
1759 .event_spec = tsl2x7x_events,
1760 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1762 .type = IIO_INTENSITY,
1767 .chan_table_elements = 3,
1768 .info = &tsl2X7X_device_info[ALS],
1773 .type = IIO_PROXIMITY,
1776 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1777 .event_spec = tsl2x7x_events,
1778 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1781 .chan_table_elements = 1,
1782 .info = &tsl2X7X_device_info[PRX],
1790 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED)
1792 .type = IIO_INTENSITY,
1795 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1796 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1797 BIT(IIO_CHAN_INFO_CALIBBIAS),
1798 .event_spec = tsl2x7x_events,
1799 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1801 .type = IIO_INTENSITY,
1804 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1806 .type = IIO_PROXIMITY,
1809 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1810 .event_spec = tsl2x7x_events,
1811 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1814 .chan_table_elements = 4,
1815 .info = &tsl2X7X_device_info[ALSPRX],
1820 .type = IIO_PROXIMITY,
1823 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1824 BIT(IIO_CHAN_INFO_CALIBSCALE),
1825 .event_spec = tsl2x7x_events,
1826 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1829 .chan_table_elements = 1,
1830 .info = &tsl2X7X_device_info[PRX2],
1838 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
1840 .type = IIO_INTENSITY,
1843 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1844 BIT(IIO_CHAN_INFO_CALIBSCALE) |
1845 BIT(IIO_CHAN_INFO_CALIBBIAS),
1846 .event_spec = tsl2x7x_events,
1847 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1849 .type = IIO_INTENSITY,
1852 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1854 .type = IIO_PROXIMITY,
1857 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1858 BIT(IIO_CHAN_INFO_CALIBSCALE),
1859 .event_spec = tsl2x7x_events,
1860 .num_event_specs = ARRAY_SIZE(tsl2x7x_events),
1863 .chan_table_elements = 4,
1864 .info = &tsl2X7X_device_info[ALSPRX2],
1868 static int tsl2x7x_probe(struct i2c_client *clientp,
1869 const struct i2c_device_id *id)
1872 unsigned char device_id;
1873 struct iio_dev *indio_dev;
1874 struct tsl2X7X_chip *chip;
1876 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
1880 chip = iio_priv(indio_dev);
1881 chip->client = clientp;
1882 i2c_set_clientdata(clientp, indio_dev);
1884 ret = tsl2x7x_i2c_read(chip->client,
1885 TSL2X7X_CHIPID, &device_id);
1889 if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
1890 (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
1891 dev_info(&chip->client->dev,
1892 "%s: i2c device found does not match expected id\n",
1897 ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
1899 dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n",
1904 /* ALS and PROX functions can be invoked via user space poll
1905 * or H/W interrupt. If busy return last sample. */
1906 mutex_init(&chip->als_mutex);
1907 mutex_init(&chip->prox_mutex);
1909 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
1910 chip->pdata = clientp->dev.platform_data;
1911 chip->id = id->driver_data;
1913 &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
1915 indio_dev->info = chip->chip_info->info;
1916 indio_dev->dev.parent = &clientp->dev;
1917 indio_dev->modes = INDIO_DIRECT_MODE;
1918 indio_dev->name = chip->client->name;
1919 indio_dev->channels = chip->chip_info->channel;
1920 indio_dev->num_channels = chip->chip_info->chan_table_elements;
1923 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq,
1925 &tsl2x7x_event_handler,
1926 IRQF_TRIGGER_RISING |
1931 dev_err(&clientp->dev,
1932 "%s: irq request failed", __func__);
1937 /* Load up the defaults */
1938 tsl2x7x_defaults(chip);
1939 /* Make sure the chip is on */
1940 tsl2x7x_chip_on(indio_dev);
1942 ret = iio_device_register(indio_dev);
1944 dev_err(&clientp->dev,
1945 "%s: iio registration failed\n", __func__);
1949 dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
1954 static int tsl2x7x_suspend(struct device *dev)
1956 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1957 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1960 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
1961 ret = tsl2x7x_chip_off(indio_dev);
1962 chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
1965 if (chip->pdata && chip->pdata->platform_power) {
1966 pm_message_t pmm = {PM_EVENT_SUSPEND};
1967 chip->pdata->platform_power(dev, pmm);
1973 static int tsl2x7x_resume(struct device *dev)
1975 struct iio_dev *indio_dev = dev_get_drvdata(dev);
1976 struct tsl2X7X_chip *chip = iio_priv(indio_dev);
1979 if (chip->pdata && chip->pdata->platform_power) {
1980 pm_message_t pmm = {PM_EVENT_RESUME};
1981 chip->pdata->platform_power(dev, pmm);
1984 if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
1985 ret = tsl2x7x_chip_on(indio_dev);
1990 static int tsl2x7x_remove(struct i2c_client *client)
1992 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1994 tsl2x7x_chip_off(indio_dev);
1996 iio_device_unregister(indio_dev);
2001 static struct i2c_device_id tsl2x7x_idtable[] = {
2002 { "tsl2571", tsl2571 },
2003 { "tsl2671", tsl2671 },
2004 { "tmd2671", tmd2671 },
2005 { "tsl2771", tsl2771 },
2006 { "tmd2771", tmd2771 },
2007 { "tsl2572", tsl2572 },
2008 { "tsl2672", tsl2672 },
2009 { "tmd2672", tmd2672 },
2010 { "tsl2772", tsl2772 },
2011 { "tmd2772", tmd2772 },
2015 MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
2017 static const struct dev_pm_ops tsl2x7x_pm_ops = {
2018 .suspend = tsl2x7x_suspend,
2019 .resume = tsl2x7x_resume,
2022 /* Driver definition */
2023 static struct i2c_driver tsl2x7x_driver = {
2026 .pm = &tsl2x7x_pm_ops,
2028 .id_table = tsl2x7x_idtable,
2029 .probe = tsl2x7x_probe,
2030 .remove = tsl2x7x_remove,
2033 module_i2c_driver(tsl2x7x_driver);
2035 MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
2036 MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
2037 MODULE_LICENSE("GPL");