1 // SPDX-License-Identifier: GPL-2.0-only
3  * TI ADC081C/ADC101C/ADC121C 8/10/12-bit ADC driver
14  * bits handled. For the 8-bit and 10-bit models the least-significant 4 or 2
24 #include <linux/iio/iio.h>
25 #include <linux/iio/buffer.h>
26 #include <linux/iio/trigger_consumer.h>
27 #include <linux/iio/triggered_buffer.h>
28 #include <linux/regulator/consumer.h>
46 static int adc081c_read_raw(struct iio_dev *iio,  in adc081c_read_raw()  argument
50 	struct adc081c *adc = iio_priv(iio);  in adc081c_read_raw()
55 		err = i2c_smbus_read_word_swapped(adc->i2c, REG_CONV_RES);  in adc081c_read_raw()
59 		*value = (err & 0xFFF) >> (12 - adc->bits);  in adc081c_read_raw()
63 		err = regulator_get_voltage(adc->ref);  in adc081c_read_raw()
68 		*shift = adc->bits;  in adc081c_read_raw()
76 	return -EINVAL;  in adc081c_read_raw()
87 		.shift = 12 - (_bits),				\
135 	struct iio_dev *indio_dev = pf->indio_dev;  in adc081c_trigger_handler()
139 	ret = i2c_smbus_read_word_swapped(data->i2c, REG_CONV_RES);  in adc081c_trigger_handler()
142 	data->scan.channel = ret;  in adc081c_trigger_handler()
143 	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,  in adc081c_trigger_handler()
146 	iio_trigger_notify_done(indio_dev->trig);  in adc081c_trigger_handler()
157 	struct iio_dev *iio;  in adc081c_probe()  local
162 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))  in adc081c_probe()
163 		return -EOPNOTSUPP;  in adc081c_probe()
167 	iio = devm_iio_device_alloc(&client->dev, sizeof(*adc));  in adc081c_probe()
168 	if (!iio)  in adc081c_probe()
169 		return -ENOMEM;  in adc081c_probe()
171 	adc = iio_priv(iio);  in adc081c_probe()
172 	adc->i2c = client;  in adc081c_probe()
173 	adc->bits = model->bits;  in adc081c_probe()
175 	adc->ref = devm_regulator_get(&client->dev, "vref");  in adc081c_probe()
176 	if (IS_ERR(adc->ref))  in adc081c_probe()
177 		return PTR_ERR(adc->ref);  in adc081c_probe()
179 	err = regulator_enable(adc->ref);  in adc081c_probe()
183 	err = devm_add_action_or_reset(&client->dev, adc081c_reg_disable,  in adc081c_probe()
184 				       adc->ref);  in adc081c_probe()
188 	iio->name = dev_name(&client->dev);  in adc081c_probe()
189 	iio->modes = INDIO_DIRECT_MODE;  in adc081c_probe()
190 	iio->info = &adc081c_info;  in adc081c_probe()
192 	iio->channels = model->channels;  in adc081c_probe()
193 	iio->num_channels = ADC081C_NUM_CHANNELS;  in adc081c_probe()
195 	err = devm_iio_triggered_buffer_setup(&client->dev, iio, NULL,  in adc081c_probe()
198 		dev_err(&client->dev, "iio triggered buffer setup failed\n");  in adc081c_probe()
202 	return devm_iio_device_register(&client->dev, iio);  in adc081c_probe()
239 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");