2  * apds9300.c - IIO driver for Avago APDS9300 ambient light sensor
6  * This file is subject to the terms and conditions of version 2 of
60 /* Calculated values 1000 * (CH1/CH0)^1.4 for CH1/CH0 from 0 to 0.52 */
62 	0, 2, 4, 7, 11, 15, 19, 24, 29, 34, 40, 45, 51, 57, 64, 70, 77, 84, 91,
68 static unsigned long apds9300_calculate_lux(u16 ch0, u16 ch1)  in apds9300_calculate_lux()  argument
73 	if (ch0 == 0)  in apds9300_calculate_lux()
76 	tmp = DIV_ROUND_UP(ch1 * 100, ch0);  in apds9300_calculate_lux()
78 		lux = 3150 * ch0 - (unsigned long)DIV_ROUND_UP_ULL(ch0  in apds9300_calculate_lux()
81 		lux = 2290 * ch0 - 2910 * ch1;  in apds9300_calculate_lux()
83 		lux = 1570 * ch0 - 1800 * ch1;  in apds9300_calculate_lux()
85 		lux = 338 * ch0 - 260 * ch1;  in apds9300_calculate_lux()
98 	if (!data->power_state)  in apds9300_get_adc_val()
99 		return -EBUSY;  in apds9300_get_adc_val()
104 	ret = i2c_smbus_read_word_data(data->client, flags);  in apds9300_get_adc_val()
106 		dev_err(&data->client->dev,  in apds9300_get_adc_val()
116 	if (!data->power_state)  in apds9300_set_thresh_low()
117 		return -EBUSY;  in apds9300_set_thresh_low()
120 		return -EINVAL;  in apds9300_set_thresh_low()
122 	ret = i2c_smbus_write_word_data(data->client, APDS9300_THRESHLOWLOW  in apds9300_set_thresh_low()
125 		dev_err(&data->client->dev, "failed to set thresh_low\n");  in apds9300_set_thresh_low()
128 	data->thresh_low = value;  in apds9300_set_thresh_low()
137 	if (!data->power_state)  in apds9300_set_thresh_hi()
138 		return -EBUSY;  in apds9300_set_thresh_hi()
141 		return -EINVAL;  in apds9300_set_thresh_hi()
143 	ret = i2c_smbus_write_word_data(data->client, APDS9300_THRESHHIGHLOW  in apds9300_set_thresh_hi()
146 		dev_err(&data->client->dev, "failed to set thresh_hi\n");  in apds9300_set_thresh_hi()
149 	data->thresh_hi = value;  in apds9300_set_thresh_hi()
159 	if (!data->power_state)  in apds9300_set_intr_state()
160 		return -EBUSY;  in apds9300_set_intr_state()
163 	ret = i2c_smbus_write_byte_data(data->client,  in apds9300_set_intr_state()
166 		dev_err(&data->client->dev,  in apds9300_set_intr_state()
170 	data->intr_en = state;  in apds9300_set_intr_state()
181 	ret = i2c_smbus_write_byte_data(data->client,  in apds9300_set_power_state()
184 		dev_err(&data->client->dev,  in apds9300_set_power_state()
188 	data->power_state = state;  in apds9300_set_power_state()
197 	ret = i2c_smbus_write_byte(data->client, APDS9300_CLEAR | APDS9300_CMD);  in apds9300_clear_intr()
199 		dev_err(&data->client->dev, "failed to clear interrupt\n");  in apds9300_clear_intr()
217 	ret = i2c_smbus_read_byte_data(data->client,  in apds9300_chip_init()
220 		ret = -ENODEV;  in apds9300_chip_init()
234 	dev_err(&data->client->dev, "failed to init the chip\n");  in apds9300_chip_init()
242 	int ch0, ch1, ret = -EINVAL;  in apds9300_read_raw()  local
245 	mutex_lock(&data->mutex);  in apds9300_read_raw()
246 	switch (chan->type) {  in apds9300_read_raw()
248 		ch0 = apds9300_get_adc_val(data, 0);  in apds9300_read_raw()
249 		if (ch0 < 0) {  in apds9300_read_raw()
250 			ret = ch0;  in apds9300_read_raw()
258 		*val = apds9300_calculate_lux(ch0, ch1);  in apds9300_read_raw()
262 		ret = apds9300_get_adc_val(data, chan->channel);  in apds9300_read_raw()
271 	mutex_unlock(&data->mutex);  in apds9300_read_raw()
285 		*val = data->thresh_hi;  in apds9300_read_thresh()
288 		*val = data->thresh_low;  in apds9300_read_thresh()
291 		return -EINVAL;  in apds9300_read_thresh()
305 	mutex_lock(&data->mutex);  in apds9300_write_thresh()
310 	mutex_unlock(&data->mutex);  in apds9300_write_thresh()
322 	return data->intr_en;  in apds9300_read_interrupt_config()
332 	mutex_lock(&data->mutex);  in apds9300_write_interrupt_config()
334 	mutex_unlock(&data->mutex);  in apds9300_write_interrupt_config()
411 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in apds9300_probe()
413 		return -ENOMEM;  in apds9300_probe()
417 	data->client = client;  in apds9300_probe()
423 	mutex_init(&data->mutex);  in apds9300_probe()
425 	indio_dev->dev.parent = &client->dev;  in apds9300_probe()
426 	indio_dev->channels = apds9300_channels;  in apds9300_probe()
427 	indio_dev->num_channels = ARRAY_SIZE(apds9300_channels);  in apds9300_probe()
428 	indio_dev->name = APDS9300_DRV_NAME;  in apds9300_probe()
429 	indio_dev->modes = INDIO_DIRECT_MODE;  in apds9300_probe()
431 	if (client->irq)  in apds9300_probe()
432 		indio_dev->info = &apds9300_info;  in apds9300_probe()
434 		indio_dev->info = &apds9300_info_no_irq;  in apds9300_probe()
436 	if (client->irq) {  in apds9300_probe()
437 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in apds9300_probe()
442 			dev_err(&client->dev, "irq request error %d\n", -ret);  in apds9300_probe()
480 	mutex_lock(&data->mutex);  in apds9300_suspend()
482 	mutex_unlock(&data->mutex);  in apds9300_suspend()
493 	mutex_lock(&data->mutex);  in apds9300_resume()
495 	mutex_unlock(&data->mutex);  in apds9300_resume()