2 * Device driver for monitoring ambient light intensity (lux)
3 * within the TAOS tsl258x family of devices (tsl2580, tsl2581, tsl2583).
5 * Copyright (c) 2011, TAOS Corporation.
6 * Copyright (c) 2016-2017 Brian Masney <masneyb@onstation.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 #include <linux/kernel.h>
20 #include <linux/i2c.h>
21 #include <linux/errno.h>
22 #include <linux/delay.h>
23 #include <linux/string.h>
24 #include <linux/mutex.h>
25 #include <linux/unistd.h>
26 #include <linux/slab.h>
27 #include <linux/module.h>
28 #include <linux/iio/iio.h>
29 #include <linux/iio/sysfs.h>
30 #include <linux/pm_runtime.h>
32 /* Device Registers and Masks */
33 #define TSL2583_CNTRL 0x00
34 #define TSL2583_ALS_TIME 0X01
35 #define TSL2583_INTERRUPT 0x02
36 #define TSL2583_GAIN 0x07
37 #define TSL2583_REVID 0x11
38 #define TSL2583_CHIPID 0x12
39 #define TSL2583_ALS_CHAN0LO 0x14
40 #define TSL2583_ALS_CHAN0HI 0x15
41 #define TSL2583_ALS_CHAN1LO 0x16
42 #define TSL2583_ALS_CHAN1HI 0x17
43 #define TSL2583_TMR_LO 0x18
44 #define TSL2583_TMR_HI 0x19
46 /* tsl2583 cmd reg masks */
47 #define TSL2583_CMD_REG 0x80
48 #define TSL2583_CMD_SPL_FN 0x60
49 #define TSL2583_CMD_ALS_INT_CLR 0x01
51 /* tsl2583 cntrl reg masks */
52 #define TSL2583_CNTL_ADC_ENBL 0x02
53 #define TSL2583_CNTL_PWR_OFF 0x00
54 #define TSL2583_CNTL_PWR_ON 0x01
56 /* tsl2583 status reg masks */
57 #define TSL2583_STA_ADC_VALID 0x01
58 #define TSL2583_STA_ADC_INTR 0x10
60 /* Lux calculation constants */
61 #define TSL2583_LUX_CALC_OVER_FLOW 65535
63 #define TSL2583_INTERRUPT_DISABLED 0x00
65 #define TSL2583_CHIP_ID 0x90
66 #define TSL2583_CHIP_ID_MASK 0xf0
68 #define TSL2583_POWER_OFF_DELAY_MS 2000
71 struct tsl2583_als_info {
83 static const struct tsl2583_lux tsl2583_default_lux[] = {
84 { 9830, 8520, 15729 },
85 { 12452, 10807, 23344 },
86 { 14746, 6383, 11705 },
87 { 17695, 4063, 6554 },
88 { 0, 0, 0 } /* Termination segment */
91 #define TSL2583_MAX_LUX_TABLE_ENTRIES 11
93 struct tsl2583_settings {
100 * This structure is intentionally large to accommodate updates via
101 * sysfs. Sized to 11 = max 10 segments + 1 termination segment.
102 * Assumption is that one and only one type of glass used.
104 struct tsl2583_lux als_device_lux[TSL2583_MAX_LUX_TABLE_ENTRIES];
107 struct tsl2583_chip {
108 struct mutex als_mutex;
109 struct i2c_client *client;
110 struct tsl2583_als_info als_cur_info;
111 struct tsl2583_settings als_settings;
122 /* Index = (0 - 3) Used to validate the gain selection index */
123 static const struct gainadj gainadj[] = {
131 * Provides initial operational parameter defaults.
132 * These defaults may be changed through the device's sysfs files.
134 static void tsl2583_defaults(struct tsl2583_chip *chip)
137 * The integration time must be a multiple of 50ms and within the
138 * range [50, 600] ms.
140 chip->als_settings.als_time = 100;
143 * This is an index into the gainadj table. Assume clear glass as the
146 chip->als_settings.als_gain = 0;
148 /* Default gain trim to account for aperture effects */
149 chip->als_settings.als_gain_trim = 1000;
151 /* Known external ALS reading used for calibration */
152 chip->als_settings.als_cal_target = 130;
154 /* Default lux table. */
155 memcpy(chip->als_settings.als_device_lux, tsl2583_default_lux,
156 sizeof(tsl2583_default_lux));
160 * Reads and calculates current lux value.
161 * The raw ch0 and ch1 values of the ambient light sensed in the last
162 * integration cycle are read from the device.
163 * Time scale factor array values are adjusted based on the integration time.
164 * The raw values are multiplied by a scale factor, and device gain is obtained
165 * using gain index. Limit checks are done next, then the ratio of a multiple
166 * of ch1 value, to the ch0 value, is calculated. The array als_device_lux[]
167 * declared above is then scanned to find the first ratio value that is just
168 * above the ratio we just calculated. The ch0 and ch1 multiplier constants in
169 * the array are then used along with the time scale factor array values, to
172 static int tsl2583_get_lux(struct iio_dev *indio_dev)
174 u16 ch0, ch1; /* separated ch0/ch1 data from device */
175 u32 lux; /* raw lux calculated from device data */
179 struct tsl2583_lux *p;
180 struct tsl2583_chip *chip = iio_priv(indio_dev);
183 ret = i2c_smbus_read_byte_data(chip->client, TSL2583_CMD_REG);
185 dev_err(&chip->client->dev, "%s: failed to read CMD_REG register\n",
190 /* is data new & valid */
191 if (!(ret & TSL2583_STA_ADC_INTR)) {
192 dev_err(&chip->client->dev, "%s: data not valid; returning last value\n",
194 ret = chip->als_cur_info.lux; /* return LAST VALUE */
198 for (i = 0; i < 4; i++) {
199 int reg = TSL2583_CMD_REG | (TSL2583_ALS_CHAN0LO + i);
201 ret = i2c_smbus_read_byte_data(chip->client, reg);
203 dev_err(&chip->client->dev, "%s: failed to read register %x\n",
211 * Clear the pending interrupt status bit on the chip to allow the next
212 * integration cycle to start. This has to be done even though this
213 * driver currently does not support interrupts.
215 ret = i2c_smbus_write_byte(chip->client,
216 (TSL2583_CMD_REG | TSL2583_CMD_SPL_FN |
217 TSL2583_CMD_ALS_INT_CLR));
219 dev_err(&chip->client->dev, "%s: failed to clear the interrupt bit\n",
221 goto done; /* have no data, so return failure */
224 /* extract ALS/lux data */
225 ch0 = le16_to_cpup((const __le16 *)&buf[0]);
226 ch1 = le16_to_cpup((const __le16 *)&buf[2]);
228 chip->als_cur_info.als_ch0 = ch0;
229 chip->als_cur_info.als_ch1 = ch1;
231 if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation))
236 * The sensor appears to be in total darkness so set the
237 * calculated lux to 0 and return early to avoid a division by
238 * zero below when calculating the ratio.
241 chip->als_cur_info.lux = 0;
245 /* calculate ratio */
246 ratio = (ch1 << 15) / ch0;
248 /* convert to unscaled lux using the pointer to the table */
249 for (p = (struct tsl2583_lux *)chip->als_settings.als_device_lux;
250 p->ratio != 0 && p->ratio < ratio; p++)
258 ch0lux = ((ch0 * p->ch0) +
259 (gainadj[chip->als_settings.als_gain].ch0 >> 1))
260 / gainadj[chip->als_settings.als_gain].ch0;
261 ch1lux = ((ch1 * p->ch1) +
262 (gainadj[chip->als_settings.als_gain].ch1 >> 1))
263 / gainadj[chip->als_settings.als_gain].ch1;
265 /* note: lux is 31 bit max at this point */
266 if (ch1lux > ch0lux) {
267 dev_dbg(&chip->client->dev, "%s: No Data - Returning 0\n",
270 chip->als_cur_info.lux = 0;
274 lux = ch0lux - ch1lux;
277 /* adjust for active time scale */
278 if (chip->als_time_scale == 0)
281 lux = (lux + (chip->als_time_scale >> 1)) /
282 chip->als_time_scale;
285 * Adjust for active gain scale.
286 * The tsl2583_default_lux tables above have a factor of 8192 built in,
287 * so we need to shift right.
288 * User-specified gain provides a multiplier.
289 * Apply user-specified gain before shifting right to retain precision.
290 * Use 64 bits to avoid overflow on multiplication.
291 * Then go back to 32 bits before division to avoid using div_u64().
294 lux64 = lux64 * chip->als_settings.als_gain_trim;
297 lux = (lux + 500) / 1000;
299 if (lux > TSL2583_LUX_CALC_OVER_FLOW) { /* check for overflow */
301 lux = TSL2583_LUX_CALC_OVER_FLOW;
304 /* Update the structure with the latest VALID lux. */
305 chip->als_cur_info.lux = lux;
313 * Obtain single reading and calculate the als_gain_trim (later used
314 * to derive actual lux).
315 * Return updated gain_trim value.
317 static int tsl2583_als_calibrate(struct iio_dev *indio_dev)
319 struct tsl2583_chip *chip = iio_priv(indio_dev);
320 unsigned int gain_trim_val;
324 ret = i2c_smbus_read_byte_data(chip->client,
325 TSL2583_CMD_REG | TSL2583_CNTRL);
327 dev_err(&chip->client->dev,
328 "%s: failed to read from the CNTRL register\n",
333 if ((ret & (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON))
334 != (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON)) {
335 dev_err(&chip->client->dev,
336 "%s: Device is not powered on and/or ADC is not enabled\n",
339 } else if ((ret & TSL2583_STA_ADC_VALID) != TSL2583_STA_ADC_VALID) {
340 dev_err(&chip->client->dev,
341 "%s: The two ADC channels have not completed an integration cycle\n",
346 lux_val = tsl2583_get_lux(indio_dev);
348 dev_err(&chip->client->dev, "%s: failed to get lux\n",
353 /* Avoid division by zero of lux_value later on */
355 dev_err(&chip->client->dev,
356 "%s: lux_val of 0 will produce out of range trim_value\n",
361 gain_trim_val = (unsigned int)(((chip->als_settings.als_cal_target)
362 * chip->als_settings.als_gain_trim) / lux_val);
363 if ((gain_trim_val < 250) || (gain_trim_val > 4000)) {
364 dev_err(&chip->client->dev,
365 "%s: trim_val of %d is not within the range [250, 4000]\n",
366 __func__, gain_trim_val);
370 chip->als_settings.als_gain_trim = (int)gain_trim_val;
375 static int tsl2583_set_als_time(struct tsl2583_chip *chip)
377 int als_count, als_time, ret;
380 /* determine als integration register */
381 als_count = (chip->als_settings.als_time * 100 + 135) / 270;
383 als_count = 1; /* ensure at least one cycle */
385 /* convert back to time (encompasses overrides) */
386 als_time = (als_count * 27 + 5) / 10;
388 val = 256 - als_count;
389 ret = i2c_smbus_write_byte_data(chip->client,
390 TSL2583_CMD_REG | TSL2583_ALS_TIME,
393 dev_err(&chip->client->dev, "%s: failed to set the als time to %d\n",
398 /* set chip struct re scaling and saturation */
399 chip->als_saturation = als_count * 922; /* 90% of full scale */
400 chip->als_time_scale = (als_time + 25) / 50;
405 static int tsl2583_set_als_gain(struct tsl2583_chip *chip)
409 /* Set the gain based on als_settings struct */
410 ret = i2c_smbus_write_byte_data(chip->client,
411 TSL2583_CMD_REG | TSL2583_GAIN,
412 chip->als_settings.als_gain);
414 dev_err(&chip->client->dev,
415 "%s: failed to set the gain to %d\n", __func__,
416 chip->als_settings.als_gain);
421 static int tsl2583_set_power_state(struct tsl2583_chip *chip, u8 state)
425 ret = i2c_smbus_write_byte_data(chip->client,
426 TSL2583_CMD_REG | TSL2583_CNTRL, state);
428 dev_err(&chip->client->dev,
429 "%s: failed to set the power state to %d\n", __func__,
436 * Turn the device on.
437 * Configuration must be set before calling this function.
439 static int tsl2583_chip_init_and_power_on(struct iio_dev *indio_dev)
441 struct tsl2583_chip *chip = iio_priv(indio_dev);
444 /* Power on the device; ADC off. */
445 ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON);
449 ret = i2c_smbus_write_byte_data(chip->client,
450 TSL2583_CMD_REG | TSL2583_INTERRUPT,
451 TSL2583_INTERRUPT_DISABLED);
453 dev_err(&chip->client->dev,
454 "%s: failed to disable interrupts\n", __func__);
458 ret = tsl2583_set_als_time(chip);
462 ret = tsl2583_set_als_gain(chip);
466 usleep_range(3000, 3500);
468 ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON |
469 TSL2583_CNTL_ADC_ENBL);
476 /* Sysfs Interface Functions */
478 static ssize_t in_illuminance_input_target_show(struct device *dev,
479 struct device_attribute *attr,
482 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
483 struct tsl2583_chip *chip = iio_priv(indio_dev);
486 mutex_lock(&chip->als_mutex);
487 ret = sprintf(buf, "%d\n", chip->als_settings.als_cal_target);
488 mutex_unlock(&chip->als_mutex);
493 static ssize_t in_illuminance_input_target_store(struct device *dev,
494 struct device_attribute *attr,
495 const char *buf, size_t len)
497 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
498 struct tsl2583_chip *chip = iio_priv(indio_dev);
501 if (kstrtoint(buf, 0, &value) || !value)
504 mutex_lock(&chip->als_mutex);
505 chip->als_settings.als_cal_target = value;
506 mutex_unlock(&chip->als_mutex);
511 static ssize_t in_illuminance_calibrate_store(struct device *dev,
512 struct device_attribute *attr,
513 const char *buf, size_t len)
515 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
516 struct tsl2583_chip *chip = iio_priv(indio_dev);
519 if (kstrtoint(buf, 0, &value) || value != 1)
522 mutex_lock(&chip->als_mutex);
524 ret = tsl2583_als_calibrate(indio_dev);
530 mutex_unlock(&chip->als_mutex);
535 static ssize_t in_illuminance_lux_table_show(struct device *dev,
536 struct device_attribute *attr,
539 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
540 struct tsl2583_chip *chip = iio_priv(indio_dev);
544 for (i = 0; i < ARRAY_SIZE(chip->als_settings.als_device_lux); i++) {
545 offset += sprintf(buf + offset, "%u,%u,%u,",
546 chip->als_settings.als_device_lux[i].ratio,
547 chip->als_settings.als_device_lux[i].ch0,
548 chip->als_settings.als_device_lux[i].ch1);
549 if (chip->als_settings.als_device_lux[i].ratio == 0) {
551 * We just printed the first "0" entry.
552 * Now get rid of the extra "," and break.
559 offset += sprintf(buf + offset, "\n");
564 static ssize_t in_illuminance_lux_table_store(struct device *dev,
565 struct device_attribute *attr,
566 const char *buf, size_t len)
568 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
569 struct tsl2583_chip *chip = iio_priv(indio_dev);
570 const unsigned int max_ints = TSL2583_MAX_LUX_TABLE_ENTRIES * 3;
571 int value[TSL2583_MAX_LUX_TABLE_ENTRIES * 3 + 1];
575 mutex_lock(&chip->als_mutex);
577 get_options(buf, ARRAY_SIZE(value), value);
580 * We now have an array of ints starting at value[1], and
581 * enumerated by value[0].
582 * We expect each group of three ints is one table entry,
583 * and the last table entry is all 0.
586 if ((n % 3) || n < 6 || n > max_ints) {
588 "%s: The number of entries in the lux table must be a multiple of 3 and within the range [6, %d]\n",
592 if ((value[n - 2] | value[n - 1] | value[n]) != 0) {
593 dev_err(dev, "%s: The last 3 entries in the lux table must be zeros.\n",
598 memcpy(chip->als_settings.als_device_lux, &value[1],
599 value[0] * sizeof(value[1]));
604 mutex_unlock(&chip->als_mutex);
609 static IIO_CONST_ATTR(in_illuminance_calibscale_available, "1 8 16 111");
610 static IIO_CONST_ATTR(in_illuminance_integration_time_available,
611 "0.000050 0.000100 0.000150 0.000200 0.000250 0.000300 0.000350 0.000400 0.000450 0.000500 0.000550 0.000600 0.000650");
612 static IIO_DEVICE_ATTR_RW(in_illuminance_input_target, 0);
613 static IIO_DEVICE_ATTR_WO(in_illuminance_calibrate, 0);
614 static IIO_DEVICE_ATTR_RW(in_illuminance_lux_table, 0);
616 static struct attribute *sysfs_attrs_ctrl[] = {
617 &iio_const_attr_in_illuminance_calibscale_available.dev_attr.attr,
618 &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
619 &iio_dev_attr_in_illuminance_input_target.dev_attr.attr,
620 &iio_dev_attr_in_illuminance_calibrate.dev_attr.attr,
621 &iio_dev_attr_in_illuminance_lux_table.dev_attr.attr,
625 static const struct attribute_group tsl2583_attribute_group = {
626 .attrs = sysfs_attrs_ctrl,
629 static const struct iio_chan_spec tsl2583_channels[] = {
633 .channel2 = IIO_MOD_LIGHT_IR,
634 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
639 .channel2 = IIO_MOD_LIGHT_BOTH,
640 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
644 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
645 BIT(IIO_CHAN_INFO_CALIBBIAS) |
646 BIT(IIO_CHAN_INFO_CALIBSCALE) |
647 BIT(IIO_CHAN_INFO_INT_TIME),
651 static int tsl2583_set_pm_runtime_busy(struct tsl2583_chip *chip, bool on)
656 ret = pm_runtime_get_sync(&chip->client->dev);
658 pm_runtime_put_noidle(&chip->client->dev);
660 pm_runtime_mark_last_busy(&chip->client->dev);
661 ret = pm_runtime_put_autosuspend(&chip->client->dev);
667 static int tsl2583_read_raw(struct iio_dev *indio_dev,
668 struct iio_chan_spec const *chan,
669 int *val, int *val2, long mask)
671 struct tsl2583_chip *chip = iio_priv(indio_dev);
674 ret = tsl2583_set_pm_runtime_busy(chip, true);
678 mutex_lock(&chip->als_mutex);
682 case IIO_CHAN_INFO_RAW:
683 if (chan->type == IIO_LIGHT) {
684 ret = tsl2583_get_lux(indio_dev);
689 * From page 20 of the TSL2581, TSL2583 data
690 * sheet (TAOS134 − MARCH 2011):
692 * One of the photodiodes (channel 0) is
693 * sensitive to both visible and infrared light,
694 * while the second photodiode (channel 1) is
695 * sensitive primarily to infrared light.
697 if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
698 *val = chip->als_cur_info.als_ch0;
700 *val = chip->als_cur_info.als_ch1;
705 case IIO_CHAN_INFO_PROCESSED:
706 if (chan->type == IIO_LIGHT) {
707 ret = tsl2583_get_lux(indio_dev);
715 case IIO_CHAN_INFO_CALIBBIAS:
716 if (chan->type == IIO_LIGHT) {
717 *val = chip->als_settings.als_gain_trim;
721 case IIO_CHAN_INFO_CALIBSCALE:
722 if (chan->type == IIO_LIGHT) {
723 *val = gainadj[chip->als_settings.als_gain].mean;
727 case IIO_CHAN_INFO_INT_TIME:
728 if (chan->type == IIO_LIGHT) {
730 *val2 = chip->als_settings.als_time;
731 ret = IIO_VAL_INT_PLUS_MICRO;
739 mutex_unlock(&chip->als_mutex);
745 * Preserve the ret variable if the call to
746 * tsl2583_set_pm_runtime_busy() is successful so the reading
747 * (if applicable) is returned to user space.
749 pm_ret = tsl2583_set_pm_runtime_busy(chip, false);
756 static int tsl2583_write_raw(struct iio_dev *indio_dev,
757 struct iio_chan_spec const *chan,
758 int val, int val2, long mask)
760 struct tsl2583_chip *chip = iio_priv(indio_dev);
763 ret = tsl2583_set_pm_runtime_busy(chip, true);
767 mutex_lock(&chip->als_mutex);
771 case IIO_CHAN_INFO_CALIBBIAS:
772 if (chan->type == IIO_LIGHT) {
773 chip->als_settings.als_gain_trim = val;
777 case IIO_CHAN_INFO_CALIBSCALE:
778 if (chan->type == IIO_LIGHT) {
781 for (i = 0; i < ARRAY_SIZE(gainadj); i++) {
782 if (gainadj[i].mean == val) {
783 chip->als_settings.als_gain = i;
784 ret = tsl2583_set_als_gain(chip);
790 case IIO_CHAN_INFO_INT_TIME:
791 if (chan->type == IIO_LIGHT && !val && val2 >= 50 &&
792 val2 <= 650 && !(val2 % 50)) {
793 chip->als_settings.als_time = val2;
794 ret = tsl2583_set_als_time(chip);
801 mutex_unlock(&chip->als_mutex);
806 ret = tsl2583_set_pm_runtime_busy(chip, false);
813 static const struct iio_info tsl2583_info = {
814 .attrs = &tsl2583_attribute_group,
815 .driver_module = THIS_MODULE,
816 .read_raw = tsl2583_read_raw,
817 .write_raw = tsl2583_write_raw,
820 static int tsl2583_probe(struct i2c_client *clientp,
821 const struct i2c_device_id *idp)
824 struct tsl2583_chip *chip;
825 struct iio_dev *indio_dev;
827 if (!i2c_check_functionality(clientp->adapter,
828 I2C_FUNC_SMBUS_BYTE_DATA)) {
829 dev_err(&clientp->dev, "%s: i2c smbus byte data functionality is unsupported\n",
834 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
838 chip = iio_priv(indio_dev);
839 chip->client = clientp;
840 i2c_set_clientdata(clientp, indio_dev);
842 mutex_init(&chip->als_mutex);
844 ret = i2c_smbus_read_byte_data(clientp,
845 TSL2583_CMD_REG | TSL2583_CHIPID);
847 dev_err(&clientp->dev,
848 "%s: failed to read the chip ID register\n", __func__);
852 if ((ret & TSL2583_CHIP_ID_MASK) != TSL2583_CHIP_ID) {
853 dev_err(&clientp->dev, "%s: received an unknown chip ID %x\n",
858 indio_dev->info = &tsl2583_info;
859 indio_dev->channels = tsl2583_channels;
860 indio_dev->num_channels = ARRAY_SIZE(tsl2583_channels);
861 indio_dev->dev.parent = &clientp->dev;
862 indio_dev->modes = INDIO_DIRECT_MODE;
863 indio_dev->name = chip->client->name;
865 pm_runtime_enable(&clientp->dev);
866 pm_runtime_set_autosuspend_delay(&clientp->dev,
867 TSL2583_POWER_OFF_DELAY_MS);
868 pm_runtime_use_autosuspend(&clientp->dev);
870 ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
872 dev_err(&clientp->dev, "%s: iio registration failed\n",
877 /* Load up the V2 defaults (these are hard coded defaults for now) */
878 tsl2583_defaults(chip);
880 dev_info(&clientp->dev, "Light sensor found.\n");
885 static int tsl2583_remove(struct i2c_client *client)
887 struct iio_dev *indio_dev = i2c_get_clientdata(client);
888 struct tsl2583_chip *chip = iio_priv(indio_dev);
890 iio_device_unregister(indio_dev);
892 pm_runtime_disable(&client->dev);
893 pm_runtime_set_suspended(&client->dev);
894 pm_runtime_put_noidle(&client->dev);
896 return tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF);
899 static int __maybe_unused tsl2583_suspend(struct device *dev)
901 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
902 struct tsl2583_chip *chip = iio_priv(indio_dev);
905 mutex_lock(&chip->als_mutex);
907 ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF);
909 mutex_unlock(&chip->als_mutex);
914 static int __maybe_unused tsl2583_resume(struct device *dev)
916 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
917 struct tsl2583_chip *chip = iio_priv(indio_dev);
920 mutex_lock(&chip->als_mutex);
922 ret = tsl2583_chip_init_and_power_on(indio_dev);
924 mutex_unlock(&chip->als_mutex);
929 static const struct dev_pm_ops tsl2583_pm_ops = {
930 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
931 pm_runtime_force_resume)
932 SET_RUNTIME_PM_OPS(tsl2583_suspend, tsl2583_resume, NULL)
935 static const struct i2c_device_id tsl2583_idtable[] = {
941 MODULE_DEVICE_TABLE(i2c, tsl2583_idtable);
943 static const struct of_device_id tsl2583_of_match[] = {
944 { .compatible = "amstaos,tsl2580", },
945 { .compatible = "amstaos,tsl2581", },
946 { .compatible = "amstaos,tsl2583", },
949 MODULE_DEVICE_TABLE(of, tsl2583_of_match);
951 /* Driver definition */
952 static struct i2c_driver tsl2583_driver = {
955 .pm = &tsl2583_pm_ops,
956 .of_match_table = tsl2583_of_match,
958 .id_table = tsl2583_idtable,
959 .probe = tsl2583_probe,
960 .remove = tsl2583_remove,
962 module_i2c_driver(tsl2583_driver);
964 MODULE_AUTHOR("J. August Brenner <jbrenner@taosinc.com>");
965 MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
966 MODULE_DESCRIPTION("TAOS tsl2583 ambient light sensor driver");
967 MODULE_LICENSE("GPL");