1 // SPDX-License-Identifier: GPL-2.0-or-later
7  * Copyright (c) 2016-2017 Brian Masney <masneyb@onstation.org>
61 /* Per-device data */
70 	unsigned int ch0;  member
108 	s16 ch0;  member
113 /* Index = (0 - 3) Used to validate the gain selection index */
131 	chip->als_settings.als_time = 100;  in tsl2583_defaults()
137 	chip->als_settings.als_gain = 0;  in tsl2583_defaults()
140 	chip->als_settings.als_gain_trim = 1000;  in tsl2583_defaults()
143 	chip->als_settings.als_cal_target = 130;  in tsl2583_defaults()
146 	memcpy(chip->als_settings.als_device_lux, tsl2583_default_lux,  in tsl2583_defaults()
152  * The raw ch0 and ch1 values of the ambient light sensed in the last
157  * of ch1 value, to the ch0 value, is calculated. The array als_device_lux[]
159  * above the ratio we just calculated. The ch0 and ch1 multiplier constants in
165 	u16 ch0, ch1; /* separated ch0/ch1 data from device */  in tsl2583_get_lux()  local
174 	ret = i2c_smbus_read_byte_data(chip->client, TSL2583_CMD_REG);  in tsl2583_get_lux()
176 		dev_err(&chip->client->dev, "%s: failed to read CMD_REG register\n",  in tsl2583_get_lux()
183 		dev_err(&chip->client->dev, "%s: data not valid; returning last value\n",  in tsl2583_get_lux()
185 		ret = chip->als_cur_info.lux; /* return LAST VALUE */  in tsl2583_get_lux()
192 		ret = i2c_smbus_read_byte_data(chip->client, reg);  in tsl2583_get_lux()
194 			dev_err(&chip->client->dev, "%s: failed to read register %x\n",  in tsl2583_get_lux()
206 	ret = i2c_smbus_write_byte(chip->client,  in tsl2583_get_lux()
210 		dev_err(&chip->client->dev, "%s: failed to clear the interrupt bit\n",  in tsl2583_get_lux()
216 	ch0 = le16_to_cpup((const __le16 *)&buf[0]);  in tsl2583_get_lux()
217 	ch1 = le16_to_cpup((const __le16 *)&buf[2]);  in tsl2583_get_lux()
219 	chip->als_cur_info.als_ch0 = ch0;  in tsl2583_get_lux()
220 	chip->als_cur_info.als_ch1 = ch1;  in tsl2583_get_lux()
222 	if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation))  in tsl2583_get_lux()
225 	if (!ch0) {  in tsl2583_get_lux()
232 		chip->als_cur_info.lux = 0;  in tsl2583_get_lux()
237 	ratio = (ch1 << 15) / ch0;  in tsl2583_get_lux()
240 	for (p = (struct tsl2583_lux *)chip->als_settings.als_device_lux;  in tsl2583_get_lux()
241 	     p->ratio != 0 && p->ratio < ratio; p++)  in tsl2583_get_lux()
244 	if (p->ratio == 0) {  in tsl2583_get_lux()
249 		ch0lux = ((ch0 * p->ch0) +  in tsl2583_get_lux()
250 			  (gainadj[chip->als_settings.als_gain].ch0 >> 1))  in tsl2583_get_lux()
251 			 / gainadj[chip->als_settings.als_gain].ch0;  in tsl2583_get_lux()
252 		ch1lux = ((ch1 * p->ch1) +  in tsl2583_get_lux()
253 			  (gainadj[chip->als_settings.als_gain].ch1 >> 1))  in tsl2583_get_lux()
254 			 / gainadj[chip->als_settings.als_gain].ch1;  in tsl2583_get_lux()
258 			dev_dbg(&chip->client->dev, "%s: No Data - Returning 0\n",  in tsl2583_get_lux()
261 			chip->als_cur_info.lux = 0;  in tsl2583_get_lux()
265 		lux = ch0lux - ch1lux;  in tsl2583_get_lux()
269 	if (chip->als_time_scale == 0)  in tsl2583_get_lux()
272 		lux = (lux + (chip->als_time_scale >> 1)) /  in tsl2583_get_lux()
273 			chip->als_time_scale;  in tsl2583_get_lux()
279 	 * User-specified gain provides a multiplier.  in tsl2583_get_lux()
280 	 * Apply user-specified gain before shifting right to retain precision.  in tsl2583_get_lux()
285 	lux64 = lux64 * chip->als_settings.als_gain_trim;  in tsl2583_get_lux()
296 	chip->als_cur_info.lux = lux;  in tsl2583_get_lux()
315 	ret = i2c_smbus_read_byte_data(chip->client,  in tsl2583_als_calibrate()
318 		dev_err(&chip->client->dev,  in tsl2583_als_calibrate()
326 		dev_err(&chip->client->dev,  in tsl2583_als_calibrate()
329 		return -EINVAL;  in tsl2583_als_calibrate()
331 		dev_err(&chip->client->dev,  in tsl2583_als_calibrate()
334 		return -ENODATA;  in tsl2583_als_calibrate()
339 		dev_err(&chip->client->dev, "%s: failed to get lux\n",  in tsl2583_als_calibrate()
346 		dev_err(&chip->client->dev,  in tsl2583_als_calibrate()
349 		return -ENODATA;  in tsl2583_als_calibrate()
352 	gain_trim_val = (unsigned int)(((chip->als_settings.als_cal_target)  in tsl2583_als_calibrate()
353 			* chip->als_settings.als_gain_trim) / lux_val);  in tsl2583_als_calibrate()
355 		dev_err(&chip->client->dev,  in tsl2583_als_calibrate()
358 		return -ENODATA;  in tsl2583_als_calibrate()
361 	chip->als_settings.als_gain_trim = (int)gain_trim_val;  in tsl2583_als_calibrate()
372 	als_count = DIV_ROUND_CLOSEST(chip->als_settings.als_time * 100, 270);  in tsl2583_set_als_time()
379 	val = 256 - als_count;  in tsl2583_set_als_time()
380 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2583_set_als_time()
384 		dev_err(&chip->client->dev, "%s: failed to set the als time to %d\n",  in tsl2583_set_als_time()
390 	chip->als_saturation = als_count * 922; /* 90% of full scale */  in tsl2583_set_als_time()
391 	chip->als_time_scale = DIV_ROUND_CLOSEST(als_time, 50);  in tsl2583_set_als_time()
401 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2583_set_als_gain()
403 					chip->als_settings.als_gain);  in tsl2583_set_als_gain()
405 		dev_err(&chip->client->dev,  in tsl2583_set_als_gain()
407 			chip->als_settings.als_gain);  in tsl2583_set_als_gain()
416 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2583_set_power_state()
419 		dev_err(&chip->client->dev,  in tsl2583_set_power_state()
440 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2583_chip_init_and_power_on()
444 		dev_err(&chip->client->dev,  in tsl2583_chip_init_and_power_on()
477 	mutex_lock(&chip->als_mutex);  in in_illuminance_input_target_show()
478 	ret = sprintf(buf, "%d\n", chip->als_settings.als_cal_target);  in in_illuminance_input_target_show()
479 	mutex_unlock(&chip->als_mutex);  in in_illuminance_input_target_show()
493 		return -EINVAL;  in in_illuminance_input_target_store()
495 	mutex_lock(&chip->als_mutex);  in in_illuminance_input_target_store()
496 	chip->als_settings.als_cal_target = value;  in in_illuminance_input_target_store()
497 	mutex_unlock(&chip->als_mutex);  in in_illuminance_input_target_store()
511 		return -EINVAL;  in in_illuminance_calibrate_store()
513 	mutex_lock(&chip->als_mutex);  in in_illuminance_calibrate_store()
521 	mutex_unlock(&chip->als_mutex);  in in_illuminance_calibrate_store()
535 	for (i = 0; i < ARRAY_SIZE(chip->als_settings.als_device_lux); i++) {  in in_illuminance_lux_table_show()
537 				  chip->als_settings.als_device_lux[i].ratio,  in in_illuminance_lux_table_show()
538 				  chip->als_settings.als_device_lux[i].ch0,  in in_illuminance_lux_table_show()
539 				  chip->als_settings.als_device_lux[i].ch1);  in in_illuminance_lux_table_show()
540 		if (chip->als_settings.als_device_lux[i].ratio == 0) {  in in_illuminance_lux_table_show()
545 			offset--;  in in_illuminance_lux_table_show()
563 	int ret = -EINVAL;  in in_illuminance_lux_table_store()
566 	mutex_lock(&chip->als_mutex);  in in_illuminance_lux_table_store()
583 	if ((value[n - 2] | value[n - 1] | value[n]) != 0) {  in in_illuminance_lux_table_store()
589 	memcpy(chip->als_settings.als_device_lux, &value[1],  in in_illuminance_lux_table_store()
595 	mutex_unlock(&chip->als_mutex);  in in_illuminance_lux_table_store()
647 		ret = pm_runtime_resume_and_get(&chip->client->dev);  in tsl2583_set_pm_runtime_busy()
649 		pm_runtime_mark_last_busy(&chip->client->dev);  in tsl2583_set_pm_runtime_busy()
650 		ret = pm_runtime_put_autosuspend(&chip->client->dev);  in tsl2583_set_pm_runtime_busy()
667 	mutex_lock(&chip->als_mutex);  in tsl2583_read_raw()
669 	ret = -EINVAL;  in tsl2583_read_raw()
672 		if (chan->type == IIO_LIGHT) {  in tsl2583_read_raw()
686 			if (chan->channel2 == IIO_MOD_LIGHT_BOTH)  in tsl2583_read_raw()
687 				*val = chip->als_cur_info.als_ch0;  in tsl2583_read_raw()
689 				*val = chip->als_cur_info.als_ch1;  in tsl2583_read_raw()
695 		if (chan->type == IIO_LIGHT) {  in tsl2583_read_raw()
705 		if (chan->type == IIO_LIGHT) {  in tsl2583_read_raw()
706 			*val = chip->als_settings.als_gain_trim;  in tsl2583_read_raw()
711 		if (chan->type == IIO_LIGHT) {  in tsl2583_read_raw()
712 			*val = gainadj[chip->als_settings.als_gain].mean;  in tsl2583_read_raw()
717 		if (chan->type == IIO_LIGHT) {  in tsl2583_read_raw()
719 			*val2 = chip->als_settings.als_time;  in tsl2583_read_raw()
728 	mutex_unlock(&chip->als_mutex);  in tsl2583_read_raw()
758 	mutex_lock(&chip->als_mutex);  in tsl2583_write_raw()
760 	ret = -EINVAL;  in tsl2583_write_raw()
763 		if (chan->type == IIO_LIGHT) {  in tsl2583_write_raw()
764 			chip->als_settings.als_gain_trim = val;  in tsl2583_write_raw()
769 		if (chan->type == IIO_LIGHT) {  in tsl2583_write_raw()
774 					chip->als_settings.als_gain = i;  in tsl2583_write_raw()
782 		if (chan->type == IIO_LIGHT && !val && val2 >= 50 &&  in tsl2583_write_raw()
784 			chip->als_settings.als_time = val2;  in tsl2583_write_raw()
792 	mutex_unlock(&chip->als_mutex);  in tsl2583_write_raw()
818 	if (!i2c_check_functionality(clientp->adapter,  in tsl2583_probe()
820 		dev_err(&clientp->dev, "%s: i2c smbus byte data functionality is unsupported\n",  in tsl2583_probe()
822 		return -EOPNOTSUPP;  in tsl2583_probe()
825 	indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));  in tsl2583_probe()
827 		return -ENOMEM;  in tsl2583_probe()
830 	chip->client = clientp;  in tsl2583_probe()
833 	mutex_init(&chip->als_mutex);  in tsl2583_probe()
838 		dev_err(&clientp->dev,  in tsl2583_probe()
844 		dev_err(&clientp->dev, "%s: received an unknown chip ID %x\n",  in tsl2583_probe()
846 		return -EINVAL;  in tsl2583_probe()
849 	indio_dev->info = &tsl2583_info;  in tsl2583_probe()
850 	indio_dev->channels = tsl2583_channels;  in tsl2583_probe()
851 	indio_dev->num_channels = ARRAY_SIZE(tsl2583_channels);  in tsl2583_probe()
852 	indio_dev->modes = INDIO_DIRECT_MODE;  in tsl2583_probe()
853 	indio_dev->name = chip->client->name;  in tsl2583_probe()
855 	pm_runtime_enable(&clientp->dev);  in tsl2583_probe()
856 	pm_runtime_set_autosuspend_delay(&clientp->dev,  in tsl2583_probe()
858 	pm_runtime_use_autosuspend(&clientp->dev);  in tsl2583_probe()
862 		dev_err(&clientp->dev, "%s: iio registration failed\n",  in tsl2583_probe()
870 	dev_info(&clientp->dev, "Light sensor found.\n");  in tsl2583_probe()
882 	pm_runtime_disable(&client->dev);  in tsl2583_remove()
883 	pm_runtime_set_suspended(&client->dev);  in tsl2583_remove()
894 	mutex_lock(&chip->als_mutex);  in tsl2583_suspend()
898 	mutex_unlock(&chip->als_mutex);  in tsl2583_suspend()
909 	mutex_lock(&chip->als_mutex);  in tsl2583_resume()
913 	mutex_unlock(&chip->als_mutex);  in tsl2583_resume()
924 	{ "tsl2583", 2 },