1 // SPDX-License-Identifier: GPL-2.0-only
41 #define CALIB_FRAC_HALF		(1 << (CALIB_FRAC_BITS - 1))
52 #define TSL2563_REG_LOWLOW	0x02 /* data0 low threshold, 2 bytes */
54 #define TSL2563_REG_HIGHLOW	0x04 /* data0 high threshold, 2 bytes */
58 #define TSL2563_REG_DATA0LOW	0x0c /* broadband sensor value, 2 bytes */
60 #define TSL2563_REG_DATA1LOW	0x0e /* infrared sensor value, 2 bytes */
131 	struct i2c_client *client = chip->client;  in tsl2563_set_power()
145 	struct i2c_client *client = chip->client;  in tsl2563_get_power()
159 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2563_configure()
161 			chip->gainlevel->gaintime);  in tsl2563_configure()
164 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2563_configure()
166 			chip->high_thres & 0xFF);  in tsl2563_configure()
169 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2563_configure()
171 			(chip->high_thres >> 8) & 0xFF);  in tsl2563_configure()
174 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2563_configure()
176 			chip->low_thres & 0xFF);  in tsl2563_configure()
179 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2563_configure()
181 			(chip->low_thres >> 8) & 0xFF);  in tsl2563_configure()
209 	return ret ? 0 : -ENODEV;  in tsl2563_detect()
214 	struct i2c_client *client = chip->client;  in tsl2563_read_id()
241 		shift += 2;  in tsl2563_adc_shiftbits()
244 		/* no-op */  in tsl2563_adc_shiftbits()
264 	switch (chip->gainlevel->gaintime & TSL2563_TIMING_MASK) {  in tsl2563_wait_adc()
278 	schedule_timeout_interruptible(msecs_to_jiffies(delay) + 2);  in tsl2563_wait_adc()
283 	struct i2c_client *client = chip->client;  in tsl2563_adjust_gainlevel()
285 	if (adc > chip->gainlevel->max || adc < chip->gainlevel->min) {  in tsl2563_adjust_gainlevel()
287 		(adc > chip->gainlevel->max) ?  in tsl2563_adjust_gainlevel()
288 			chip->gainlevel++ : chip->gainlevel--;  in tsl2563_adjust_gainlevel()
292 					  chip->gainlevel->gaintime);  in tsl2563_adjust_gainlevel()
304 	struct i2c_client *client = chip->client;  in tsl2563_get_adc()
309 	if (chip->suspended)  in tsl2563_get_adc()
312 	if (!chip->int_enabled) {  in tsl2563_get_adc()
313 		cancel_delayed_work(&chip->poweroff_work);  in tsl2563_get_adc()
342 	chip->data0 = tsl2563_normalize_adc(adc0, chip->gainlevel->gaintime);  in tsl2563_get_adc()
343 	chip->data1 = tsl2563_normalize_adc(adc1, chip->gainlevel->gaintime);  in tsl2563_get_adc()
345 	if (!chip->int_enabled)  in tsl2563_get_adc()
346 		schedule_delayed_work(&chip->poweroff_work, 5 * HZ);  in tsl2563_get_adc()
367  * The basic formula is lux = c0 * adc0 - c1 * adc1, where c0 and c1 are
421 	unsigned long ratio, lux, ch0 = adc0, ch1 = adc1;  in tsl2563_adc_to_lux()  local
423 	ratio = ch0 ? ((ch1 << ADC_FRAC_BITS) / ch0) : ULONG_MAX;  in tsl2563_adc_to_lux()
425 	while (lp->ch_ratio < ratio)  in tsl2563_adc_to_lux()
428 	lux = ch0 * lp->ch0_coeff - ch1 * lp->ch1_coeff;  in tsl2563_adc_to_lux()
453 		return -EINVAL;  in tsl2563_write_raw()
454 	if (chan->channel2 == IIO_MOD_LIGHT_BOTH)  in tsl2563_write_raw()
455 		chip->calib0 = tsl2563_calib_from_sysfs(val);  in tsl2563_write_raw()
456 	else if (chan->channel2 == IIO_MOD_LIGHT_IR)  in tsl2563_write_raw()
457 		chip->calib1 = tsl2563_calib_from_sysfs(val);  in tsl2563_write_raw()
459 		return -EINVAL;  in tsl2563_write_raw()
470 	int ret = -EINVAL;  in tsl2563_read_raw()
474 	mutex_lock(&chip->lock);  in tsl2563_read_raw()
478 		switch (chan->type) {  in tsl2563_read_raw()
483 			calib0 = tsl2563_calib_adc(chip->data0, chip->calib0) *  in tsl2563_read_raw()
484 				chip->cover_comp_gain;  in tsl2563_read_raw()
485 			calib1 = tsl2563_calib_adc(chip->data1, chip->calib1) *  in tsl2563_read_raw()
486 				chip->cover_comp_gain;  in tsl2563_read_raw()
494 			if (chan->channel2 == IIO_MOD_LIGHT_BOTH)  in tsl2563_read_raw()
495 				*val = chip->data0;  in tsl2563_read_raw()
497 				*val = chip->data1;  in tsl2563_read_raw()
506 		if (chan->channel2 == IIO_MOD_LIGHT_BOTH)  in tsl2563_read_raw()
507 			*val = tsl2563_calib_to_sysfs(chip->calib0);  in tsl2563_read_raw()
509 			*val = tsl2563_calib_to_sysfs(chip->calib1);  in tsl2563_read_raw()
513 		ret = -EINVAL;  in tsl2563_read_raw()
518 	mutex_unlock(&chip->lock);  in tsl2563_read_raw()
568 		*val = chip->high_thres;  in tsl2563_read_thresh()
571 		*val = chip->low_thres;  in tsl2563_read_thresh()
574 		return -EINVAL;  in tsl2563_read_thresh()
593 	mutex_lock(&chip->lock);  in tsl2563_write_thresh()
594 	ret = i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | address,  in tsl2563_write_thresh()
598 	ret = i2c_smbus_write_byte_data(chip->client,  in tsl2563_write_thresh()
602 		chip->high_thres = val;  in tsl2563_write_thresh()
604 		chip->low_thres = val;  in tsl2563_write_thresh()
607 	mutex_unlock(&chip->lock);  in tsl2563_write_thresh()
625 	i2c_smbus_write_byte(chip->client, TSL2563_CMD | TSL2563_CLEARINT);  in tsl2563_event_handler()
636 	mutex_lock(&chip->lock);  in tsl2563_write_interrupt_config()
637 	if (state && !(chip->intr & 0x30)) {  in tsl2563_write_interrupt_config()
638 		chip->intr &= ~0x30;  in tsl2563_write_interrupt_config()
639 		chip->intr |= 0x10;  in tsl2563_write_interrupt_config()
641 		cancel_delayed_work(&chip->poweroff_work);  in tsl2563_write_interrupt_config()
650 		ret = i2c_smbus_write_byte_data(chip->client,  in tsl2563_write_interrupt_config()
652 						chip->intr);  in tsl2563_write_interrupt_config()
653 		chip->int_enabled = true;  in tsl2563_write_interrupt_config()
656 	if (!state && (chip->intr & 0x30)) {  in tsl2563_write_interrupt_config()
657 		chip->intr &= ~0x30;  in tsl2563_write_interrupt_config()
658 		ret = i2c_smbus_write_byte_data(chip->client,  in tsl2563_write_interrupt_config()
660 						chip->intr);  in tsl2563_write_interrupt_config()
661 		chip->int_enabled = false;  in tsl2563_write_interrupt_config()
663 		schedule_delayed_work(&chip->poweroff_work, 5 * HZ);  in tsl2563_write_interrupt_config()
666 	mutex_unlock(&chip->lock);  in tsl2563_write_interrupt_config()
678 	mutex_lock(&chip->lock);  in tsl2563_read_interrupt_config()
679 	ret = i2c_smbus_read_byte_data(chip->client,  in tsl2563_read_interrupt_config()
681 	mutex_unlock(&chip->lock);  in tsl2563_read_interrupt_config()
707 	struct tsl2563_platform_data *pdata = client->dev.platform_data;  in tsl2563_probe()
711 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));  in tsl2563_probe()
713 		return -ENOMEM;  in tsl2563_probe()
718 	chip->client = client;  in tsl2563_probe()
722 		dev_err(&client->dev, "detect error %d\n", -err);  in tsl2563_probe()
728 		dev_err(&client->dev, "read id error %d\n", -err);  in tsl2563_probe()
732 	mutex_init(&chip->lock);  in tsl2563_probe()
735 	chip->low_thres = 0x0;  in tsl2563_probe()
736 	chip->high_thres = 0xffff;  in tsl2563_probe()
737 	chip->gainlevel = tsl2563_gainlevel_table;  in tsl2563_probe()
738 	chip->intr = TSL2563_INT_PERSIST(4);  in tsl2563_probe()
739 	chip->calib0 = tsl2563_calib_from_sysfs(CALIB_BASE_SYSFS);  in tsl2563_probe()
740 	chip->calib1 = tsl2563_calib_from_sysfs(CALIB_BASE_SYSFS);  in tsl2563_probe()
743 		chip->cover_comp_gain = pdata->cover_comp_gain;  in tsl2563_probe()
745 		err = device_property_read_u32(&client->dev, "amstaos,cover-comp-gain",  in tsl2563_probe()
746 					       &chip->cover_comp_gain);  in tsl2563_probe()
748 			chip->cover_comp_gain = 1;  in tsl2563_probe()
751 	dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f);  in tsl2563_probe()
752 	indio_dev->name = client->name;  in tsl2563_probe()
753 	indio_dev->channels = tsl2563_channels;  in tsl2563_probe()
754 	indio_dev->num_channels = ARRAY_SIZE(tsl2563_channels);  in tsl2563_probe()
755 	indio_dev->modes = INDIO_DIRECT_MODE;  in tsl2563_probe()
757 	if (client->irq)  in tsl2563_probe()
758 		indio_dev->info = &tsl2563_info;  in tsl2563_probe()
760 		indio_dev->info = &tsl2563_info_no_irq;  in tsl2563_probe()
762 	if (client->irq) {  in tsl2563_probe()
763 		err = devm_request_threaded_irq(&client->dev, client->irq,  in tsl2563_probe()
770 			dev_err(&client->dev, "irq request error %d\n", -err);  in tsl2563_probe()
777 		dev_err(&client->dev, "configure error %d\n", -err);  in tsl2563_probe()
781 	INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work);  in tsl2563_probe()
784 	schedule_delayed_work(&chip->poweroff_work, 5 * HZ);  in tsl2563_probe()
788 		dev_err(&client->dev, "iio registration error %d\n", -err);  in tsl2563_probe()
795 	cancel_delayed_work_sync(&chip->poweroff_work);  in tsl2563_probe()
805 	if (!chip->int_enabled)  in tsl2563_remove()
806 		cancel_delayed_work(&chip->poweroff_work);  in tsl2563_remove()
807 	/* Ensure that interrupts are disabled - then flush any bottom halves */  in tsl2563_remove()
808 	chip->intr &= ~0x30;  in tsl2563_remove()
809 	i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | TSL2563_REG_INT,  in tsl2563_remove()
810 				  chip->intr);  in tsl2563_remove()
824 	mutex_lock(&chip->lock);  in tsl2563_suspend()
830 	chip->suspended = true;  in tsl2563_suspend()
833 	mutex_unlock(&chip->lock);  in tsl2563_suspend()
843 	mutex_lock(&chip->lock);  in tsl2563_resume()
853 	chip->suspended = false;  in tsl2563_resume()
856 	mutex_unlock(&chip->lock);  in tsl2563_resume()
869 	{ "tsl2562", 2 },