iio/adc/ti-adc084s021.c

70  * @adc: The ADC SPI data.
73 static int adc084s021_adc_conversion(struct adc084s021 *adc, __be16 *data)
75 	int n_words = (adc->spi_trans.len >> 1) - 1; /* Discard first word */
79 	ret = spi_sync(adc->spi, &adc->message);
84 		*(data + i) = adc->rx_buf[i + 1];
93 	struct adc084s021 *adc = iio_priv(indio_dev);
102 		ret = regulator_enable(adc->reg);
108 		adc->tx_buf[0] = channel->channel << 3;
109 		ret = adc084s021_adc_conversion(adc, &be_val);
111 		regulator_disable(adc->reg);
120 		ret = regulator_enable(adc->reg);
124 		ret = regulator_get_voltage(adc->reg);
125 		regulator_disable(adc->reg);
147 	struct adc084s021 *adc = iio_priv(indio_dev);
149 	mutex_lock(&adc->lock);
151 	if (adc084s021_adc_conversion(adc, adc->scan.channels) < 0)
152 		dev_err(&adc->spi->dev, "Failed to read data\n");
154 	iio_push_to_buffers_with_ts(indio_dev, &adc->scan, sizeof(adc->scan),
156 	mutex_unlock(&adc->lock);
164 	struct adc084s021 *adc = iio_priv(indio_dev);
171 		adc->tx_buf[i++] = channel->channel << 3;
173 	adc->spi_trans.len = 2 + (i * sizeof(__be16)); /* Trash + channels */
175 	return regulator_enable(adc->reg);
180 	struct adc084s021 *adc = iio_priv(indio_dev);
182 	adc->spi_trans.len = 4; /* Trash + single channel */
184 	return regulator_disable(adc->reg);
199 	struct adc084s021 *adc;
202 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));
208 	adc = iio_priv(indio_dev);
209 	adc->spi = spi;
219 	adc->spi_trans.tx_buf = adc->tx_buf;
220 	adc->spi_trans.rx_buf = adc->rx_buf;
221 	adc->spi_trans.len = 4; /* Trash + single channel */
222 	spi_message_init_with_transfers(&adc->message, &adc->spi_trans, 1);
224 	adc->reg = devm_regulator_get(&spi->dev, "vref");
225 	if (IS_ERR(adc->reg))
226 		return PTR_ERR(adc->reg);
228 	mutex_init(&adc->lock);