1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/iio/iio.h>
15 #include <linux/iio/sysfs.h>
16 #include <linux/iio/events.h>
17 #include <linux/iio/consumer.h> /* To get our ADC channel */
18 #include <linux/iio/types.h> /* To deal with our ADC channel */
23 #include <linux/regulator/consumer.h>
24 #include <linux/gpio/consumer.h>
36  * struct cm3605 - CM3605 state
40  * @aout: IIO ADC channel to convert the AOUT signal
62 				  IIO_EV_TYPE_THRESH, cm3605->dir);  in cm3605_prox_irq()
66 	if (cm3605->dir == IIO_EV_DIR_RISING)  in cm3605_prox_irq()
67 		cm3605->dir = IIO_EV_DIR_FALLING;  in cm3605_prox_irq()
69 		cm3605->dir = IIO_EV_DIR_RISING;  in cm3605_prox_irq()
79 	ret = iio_read_channel_processed(cm3605->aout, &res);  in cm3605_get_lux()
83 	dev_dbg(cm3605->dev, "read %d mV from ADC\n", res);  in cm3605_get_lux()
94 		dev_err(cm3605->dev, "device out of range\n");  in cm3605_get_lux()
97 	lux = res - 30;  in cm3605_get_lux()
100 	lux *= cm3605->als_max;  in cm3605_get_lux()
115 		switch (chan->type) {  in cm3605_read_raw()
123 			return -EINVAL;  in cm3605_read_raw()
126 		return -EINVAL;  in cm3605_read_raw()
159 	struct device *dev = &pdev->dev;  in cm3605_probe()
167 		return -ENOMEM;  in cm3605_probe()
171 	cm3605->dev = dev;  in cm3605_probe()
172 	cm3605->dir = IIO_EV_DIR_FALLING;  in cm3605_probe()
174 	ret = device_property_read_u32(dev, "capella,aset-resistance-ohms", &rset);  in cm3605_probe()
181 		cm3605->als_max = 650;  in cm3605_probe()
184 		cm3605->als_max = 300;  in cm3605_probe()
187 		cm3605->als_max = 100;  in cm3605_probe()
190 		cm3605->als_max = 50;  in cm3605_probe()
193 		dev_info(dev, "non-standard resistance\n");  in cm3605_probe()
194 		return -EINVAL;  in cm3605_probe()
197 	cm3605->aout = devm_iio_channel_get(dev, "aout");  in cm3605_probe()
198 	if (IS_ERR(cm3605->aout)) {  in cm3605_probe()
199 		ret = PTR_ERR(cm3605->aout);  in cm3605_probe()
200 		ret = (ret == -ENODEV) ? -EPROBE_DEFER : ret;  in cm3605_probe()
203 	ret = iio_get_channel_type(cm3605->aout, &ch_type);  in cm3605_probe()
207 		dev_err(dev, "wrong type of IIO channel specified for AOUT\n");  in cm3605_probe()
208 		return -EINVAL;  in cm3605_probe()
211 	cm3605->vdd = devm_regulator_get(dev, "vdd");  in cm3605_probe()
212 	if (IS_ERR(cm3605->vdd))  in cm3605_probe()
213 		return dev_err_probe(dev, PTR_ERR(cm3605->vdd),  in cm3605_probe()
216 	ret = regulator_enable(cm3605->vdd);  in cm3605_probe()
222 	cm3605->aset = devm_gpiod_get(dev, "aset", GPIOD_OUT_HIGH);  in cm3605_probe()
223 	if (IS_ERR(cm3605->aset)) {  in cm3605_probe()
224 		ret = dev_err_probe(dev, PTR_ERR(cm3605->aset), "no ASET GPIO\n");  in cm3605_probe()
242 	led_trigger_register_simple("cm3605", &cm3605->led);  in cm3605_probe()
243 	led_trigger_event(cm3605->led, LED_FULL);  in cm3605_probe()
245 	indio_dev->info = &cm3605_info;  in cm3605_probe()
246 	indio_dev->name = "cm3605";  in cm3605_probe()
247 	indio_dev->channels = cm3605_channels;  in cm3605_probe()
248 	indio_dev->num_channels = ARRAY_SIZE(cm3605_channels);  in cm3605_probe()
249 	indio_dev->modes = INDIO_DIRECT_MODE;  in cm3605_probe()
255 		 cm3605->als_max);  in cm3605_probe()
260 	led_trigger_event(cm3605->led, LED_OFF);  in cm3605_probe()
261 	led_trigger_unregister_simple(cm3605->led);  in cm3605_probe()
263 	gpiod_set_value_cansleep(cm3605->aset, 0);  in cm3605_probe()
265 	regulator_disable(cm3605->vdd);  in cm3605_probe()
274 	led_trigger_event(cm3605->led, LED_OFF);  in cm3605_remove()
275 	led_trigger_unregister_simple(cm3605->led);  in cm3605_remove()
276 	gpiod_set_value_cansleep(cm3605->aset, 0);  in cm3605_remove()
278 	regulator_disable(cm3605->vdd);  in cm3605_remove()
286 	led_trigger_event(cm3605->led, LED_OFF);  in cm3605_pm_suspend()
287 	regulator_disable(cm3605->vdd);  in cm3605_pm_suspend()
298 	ret = regulator_enable(cm3605->vdd);  in cm3605_pm_resume()
301 	led_trigger_event(cm3605->led, LED_FULL);  in cm3605_pm_resume()