iio/adc/max1241.c

41 static int max1241_read(struct max1241 *adc)
57 			.rx_buf = &adc->data,
62 	return spi_sync_transfer(adc->spi, xfers, ARRAY_SIZE(xfers));
70 	struct max1241 *adc = iio_priv(indio_dev);
74 		mutex_lock(&adc->lock);
76 		if (adc->shutdown) {
77 			gpiod_set_value(adc->shutdown, 0);
79 			ret = max1241_read(adc);
80 			gpiod_set_value(adc->shutdown, 1);
82 			ret = max1241_read(adc);
85 			mutex_unlock(&adc->lock);
89 		*val = (be16_to_cpu(adc->data) >> 3) & MAX1241_VAL_MASK;
91 		mutex_unlock(&adc->lock);
94 		vref_uV = regulator_get_voltage(adc->vref);
114 	struct max1241 *adc = data;
115 	struct device *dev = &adc->spi->dev;
118 	err = regulator_disable(adc->vref);
127 	struct max1241 *adc;
130 	indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));
134 	adc = iio_priv(indio_dev);
135 	adc->spi = spi;
136 	mutex_init(&adc->lock);
143 	adc->vref = devm_regulator_get(dev, "vref");
144 	if (IS_ERR(adc->vref))
145 		return dev_err_probe(dev, PTR_ERR(adc->vref),
148 	ret = regulator_enable(adc->vref);
152 	ret = devm_add_action_or_reset(dev, max1241_disable_vref_action, adc);
158 	adc->shutdown = devm_gpiod_get_optional(dev, "shutdown",
160 	if (IS_ERR(adc->shutdown))
161 		return dev_err_probe(dev, PTR_ERR(adc->shutdown),
164 	if (adc->shutdown)