1 // SPDX-License-Identifier: GPL-2.0+
3  * ADC driver for the RICOH RN5T618 power management chip family
26 /* average 4-time conversion mode */
75 	ret = regmap_bulk_read(rn5t618->regmap, reg, data, sizeof(data));  in rn5t618_read_adc_reg()
86 	struct rn5t618_adc_data *adc = data;  in rn5t618_adc_irq()  local
91 	regmap_write(adc->rn5t618->regmap, RN5T618_IR_ADC1, 0);  in rn5t618_adc_irq()
92 	regmap_write(adc->rn5t618->regmap, RN5T618_IR_ADC2, 0);  in rn5t618_adc_irq()
94 	ret = regmap_read(adc->rn5t618->regmap, RN5T618_IR_ADC3, &r);  in rn5t618_adc_irq()
96 		dev_err(adc->dev, "failed to read IRQ status: %d\n", ret);  in rn5t618_adc_irq()
98 	regmap_write(adc->rn5t618->regmap, RN5T618_IR_ADC3, 0);  in rn5t618_adc_irq()
101 		complete(&adc->conv_completion);  in rn5t618_adc_irq()
107 			    const struct iio_chan_spec *chan,  in rn5t618_adc_read()  argument
110 	struct rn5t618_adc_data *adc = iio_priv(iio_dev);  in rn5t618_adc_read()  local
116 		       rn5t618_ratios[chan->channel].numerator;  in rn5t618_adc_read()
117 		*val2 = rn5t618_ratios[chan->channel].denominator * 4095;  in rn5t618_adc_read()
123 	ret = regmap_update_bits(adc->rn5t618->regmap, RN5T618_ADCCNT3,  in rn5t618_adc_read()
125 				 chan->channel);  in rn5t618_adc_read()
129 	ret = regmap_write(adc->rn5t618->regmap, RN5T618_EN_ADCIR3,  in rn5t618_adc_read()
134 	ret = regmap_update_bits(adc->rn5t618->regmap, RN5T618_ADCCNT3,  in rn5t618_adc_read()
141 	init_completion(&adc->conv_completion);  in rn5t618_adc_read()
143 	ret = regmap_update_bits(adc->rn5t618->regmap, RN5T618_ADCCNT3,  in rn5t618_adc_read()
149 	ret = wait_for_completion_timeout(&adc->conv_completion,  in rn5t618_adc_read()
152 		dev_warn(adc->dev, "timeout waiting for adc result\n");  in rn5t618_adc_read()
153 		return -ETIMEDOUT;  in rn5t618_adc_read()
156 	ret = rn5t618_read_adc_reg(adc->rn5t618,  in rn5t618_adc_read()
157 				   RN5T618_ILIMDATAH + 2 * chan->channel,  in rn5t618_adc_read()
196 	struct rn5t618_adc_data *adc;  in rn5t618_adc_probe()  local
197 	struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);  in rn5t618_adc_probe()
199 	iio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc));  in rn5t618_adc_probe()
201 		dev_err(&pdev->dev, "failed allocating iio device\n");  in rn5t618_adc_probe()
202 		return -ENOMEM;  in rn5t618_adc_probe()
205 	adc = iio_priv(iio_dev);  in rn5t618_adc_probe()
206 	adc->dev = &pdev->dev;  in rn5t618_adc_probe()
207 	adc->rn5t618 = rn5t618;  in rn5t618_adc_probe()
209 	if (rn5t618->irq_data)  in rn5t618_adc_probe()
210 		adc->irq = regmap_irq_get_virq(rn5t618->irq_data,  in rn5t618_adc_probe()
213 	if (adc->irq <= 0) {  in rn5t618_adc_probe()
214 		dev_err(&pdev->dev, "get virq failed\n");  in rn5t618_adc_probe()
215 		return -EINVAL;  in rn5t618_adc_probe()
218 	init_completion(&adc->conv_completion);  in rn5t618_adc_probe()
220 	iio_dev->name = dev_name(&pdev->dev);  in rn5t618_adc_probe()
221 	iio_dev->info = &rn5t618_adc_iio_info;  in rn5t618_adc_probe()
222 	iio_dev->modes = INDIO_DIRECT_MODE;  in rn5t618_adc_probe()
223 	iio_dev->channels = rn5t618_adc_iio_channels;  in rn5t618_adc_probe()
224 	iio_dev->num_channels = ARRAY_SIZE(rn5t618_adc_iio_channels);  in rn5t618_adc_probe()
226 	/* stop any auto-conversion */  in rn5t618_adc_probe()
227 	ret = regmap_write(rn5t618->regmap, RN5T618_ADCCNT3, 0);  in rn5t618_adc_probe()
233 	ret = devm_request_threaded_irq(adc->dev, adc->irq, NULL,  in rn5t618_adc_probe()
235 					IRQF_ONESHOT, dev_name(adc->dev),  in rn5t618_adc_probe()
236 					adc);  in rn5t618_adc_probe()
238 		dev_err(adc->dev, "request irq %d failed: %d\n", adc->irq, ret);  in rn5t618_adc_probe()
242 	return devm_iio_device_register(adc->dev, iio_dev);  in rn5t618_adc_probe()
247 		.name   = "rn5t618-adc",
253 MODULE_ALIAS("platform:rn5t618-adc");
254 MODULE_DESCRIPTION("RICOH RN5T618 ADC driver");