1 // SPDX-License-Identifier: GPL-2.0-only
3  * apds9300.c - IIO driver for Avago APDS9300 ambient light sensor
57 /* Calculated values 1000 * (CH1/CH0)^1.4 for CH1/CH0 from 0 to 0.52 */
59 	0, 2, 4, 7, 11, 15, 19, 24, 29, 34, 40, 45, 51, 57, 64, 70, 77, 84, 91,
65 static unsigned long apds9300_calculate_lux(u16 ch0, u16 ch1)  in apds9300_calculate_lux()  argument
70 	if (ch0 == 0)  in apds9300_calculate_lux()
73 	tmp = DIV_ROUND_UP(ch1 * 100, ch0);  in apds9300_calculate_lux()
75 		lux = 3150 * ch0 - (unsigned long)DIV_ROUND_UP_ULL(ch0  in apds9300_calculate_lux()
78 		lux = 2290 * ch0 - 2910 * ch1;  in apds9300_calculate_lux()
80 		lux = 1570 * ch0 - 1800 * ch1;  in apds9300_calculate_lux()
82 		lux = 338 * ch0 - 260 * ch1;  in apds9300_calculate_lux()
95 	if (!data->power_state)  in apds9300_get_adc_val()
96 		return -EBUSY;  in apds9300_get_adc_val()
101 	ret = i2c_smbus_read_word_data(data->client, flags);  in apds9300_get_adc_val()
103 		dev_err(&data->client->dev,  in apds9300_get_adc_val()
113 	if (!data->power_state)  in apds9300_set_thresh_low()
114 		return -EBUSY;  in apds9300_set_thresh_low()
117 		return -EINVAL;  in apds9300_set_thresh_low()
119 	ret = i2c_smbus_write_word_data(data->client, APDS9300_THRESHLOWLOW  in apds9300_set_thresh_low()
122 		dev_err(&data->client->dev, "failed to set thresh_low\n");  in apds9300_set_thresh_low()
125 	data->thresh_low = value;  in apds9300_set_thresh_low()
134 	if (!data->power_state)  in apds9300_set_thresh_hi()
135 		return -EBUSY;  in apds9300_set_thresh_hi()
138 		return -EINVAL;  in apds9300_set_thresh_hi()
140 	ret = i2c_smbus_write_word_data(data->client, APDS9300_THRESHHIGHLOW  in apds9300_set_thresh_hi()
143 		dev_err(&data->client->dev, "failed to set thresh_hi\n");  in apds9300_set_thresh_hi()
146 	data->thresh_hi = value;  in apds9300_set_thresh_hi()
156 	if (!data->power_state)  in apds9300_set_intr_state()
157 		return -EBUSY;  in apds9300_set_intr_state()
160 	ret = i2c_smbus_write_byte_data(data->client,  in apds9300_set_intr_state()
163 		dev_err(&data->client->dev,  in apds9300_set_intr_state()
167 	data->intr_en = state;  in apds9300_set_intr_state()
178 	ret = i2c_smbus_write_byte_data(data->client,  in apds9300_set_power_state()
181 		dev_err(&data->client->dev,  in apds9300_set_power_state()
185 	data->power_state = state;  in apds9300_set_power_state()
194 	ret = i2c_smbus_write_byte(data->client, APDS9300_CLEAR | APDS9300_CMD);  in apds9300_clear_intr()
196 		dev_err(&data->client->dev, "failed to clear interrupt\n");  in apds9300_clear_intr()
214 	ret = i2c_smbus_read_byte_data(data->client,  in apds9300_chip_init()
217 		ret = -ENODEV;  in apds9300_chip_init()
231 	dev_err(&data->client->dev, "failed to init the chip\n");  in apds9300_chip_init()
239 	int ch0, ch1, ret = -EINVAL;  in apds9300_read_raw()  local
242 	mutex_lock(&data->mutex);  in apds9300_read_raw()
243 	switch (chan->type) {  in apds9300_read_raw()
245 		ch0 = apds9300_get_adc_val(data, 0);  in apds9300_read_raw()
246 		if (ch0 < 0) {  in apds9300_read_raw()
247 			ret = ch0;  in apds9300_read_raw()
255 		*val = apds9300_calculate_lux(ch0, ch1);  in apds9300_read_raw()
259 		ret = apds9300_get_adc_val(data, chan->channel);  in apds9300_read_raw()
268 	mutex_unlock(&data->mutex);  in apds9300_read_raw()
282 		*val = data->thresh_hi;  in apds9300_read_thresh()
285 		*val = data->thresh_low;  in apds9300_read_thresh()
288 		return -EINVAL;  in apds9300_read_thresh()
302 	mutex_lock(&data->mutex);  in apds9300_write_thresh()
307 	mutex_unlock(&data->mutex);  in apds9300_write_thresh()
319 	return data->intr_en;  in apds9300_read_interrupt_config()
329 	mutex_lock(&data->mutex);  in apds9300_write_interrupt_config()
331 	mutex_unlock(&data->mutex);  in apds9300_write_interrupt_config()
407 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in apds9300_probe()
409 		return -ENOMEM;  in apds9300_probe()
413 	data->client = client;  in apds9300_probe()
419 	mutex_init(&data->mutex);  in apds9300_probe()
421 	indio_dev->channels = apds9300_channels;  in apds9300_probe()
422 	indio_dev->num_channels = ARRAY_SIZE(apds9300_channels);  in apds9300_probe()
423 	indio_dev->name = APDS9300_DRV_NAME;  in apds9300_probe()
424 	indio_dev->modes = INDIO_DIRECT_MODE;  in apds9300_probe()
426 	if (client->irq)  in apds9300_probe()
427 		indio_dev->info = &apds9300_info;  in apds9300_probe()
429 		indio_dev->info = &apds9300_info_no_irq;  in apds9300_probe()
431 	if (client->irq) {  in apds9300_probe()
432 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in apds9300_probe()
437 			dev_err(&client->dev, "irq request error %d\n", -ret);  in apds9300_probe()
472 	mutex_lock(&data->mutex);  in apds9300_suspend()
474 	mutex_unlock(&data->mutex);  in apds9300_suspend()
485 	mutex_lock(&data->mutex);  in apds9300_resume()
487 	mutex_unlock(&data->mutex);  in apds9300_resume()