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
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),				\
132 static irqreturn_t adc081c_trigger_handler(int irq, void *p)  in adc081c_trigger_handler()  argument
134 	struct iio_poll_func *pf = p;  in adc081c_trigger_handler()
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()
163 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))  in adc081c_probe()
164 		return -EOPNOTSUPP;  in adc081c_probe()
166 	if (dev_fwnode(&client->dev))  in adc081c_probe()
167 		model = device_get_match_data(&client->dev);  in adc081c_probe()
169 		model = &adcxx1c_models[id->driver_data];  in adc081c_probe()
171 	iio = devm_iio_device_alloc(&client->dev, sizeof(*adc));  in adc081c_probe()
173 		return -ENOMEM;  in adc081c_probe()
176 	adc->i2c = client;  in adc081c_probe()
177 	adc->bits = model->bits;  in adc081c_probe()
179 	adc->ref = devm_regulator_get(&client->dev, "vref");  in adc081c_probe()
180 	if (IS_ERR(adc->ref))  in adc081c_probe()
181 		return PTR_ERR(adc->ref);  in adc081c_probe()
183 	err = regulator_enable(adc->ref);  in adc081c_probe()
187 	err = devm_add_action_or_reset(&client->dev, adc081c_reg_disable,  in adc081c_probe()
188 				       adc->ref);  in adc081c_probe()
192 	iio->name = dev_name(&client->dev);  in adc081c_probe()
193 	iio->modes = INDIO_DIRECT_MODE;  in adc081c_probe()
194 	iio->info = &adc081c_info;  in adc081c_probe()
196 	iio->channels = model->channels;  in adc081c_probe()
197 	iio->num_channels = ADC081C_NUM_CHANNELS;  in adc081c_probe()
199 	err = devm_iio_triggered_buffer_setup(&client->dev, iio, NULL,  in adc081c_probe()
202 		dev_err(&client->dev, "iio triggered buffer setup failed\n");  in adc081c_probe()
206 	return devm_iio_device_register(&client->dev, iio);  in adc081c_probe()
243 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");