52 static int ad7303_write(struct ad7303_state *st, unsigned int chan,  in ad7303_write()  argument
55 	st->data = cpu_to_be16(AD7303_CMD_UPDATE_DAC |  in ad7303_write()
57 		st->config | val);  in ad7303_write()
59 	return spi_write(st->spi, &st->data, sizeof(st->data));  in ad7303_write()
65 	struct ad7303_state *st = iio_priv(indio_dev);  in ad7303_read_dac_powerdown()  local
67 	return sprintf(buf, "%d\n", (bool)(st->config &  in ad7303_read_dac_powerdown()
75 	struct ad7303_state *st = iio_priv(indio_dev);  in ad7303_write_dac_powerdown()  local
86 		st->config |= AD7303_CFG_POWER_DOWN(chan->channel);  in ad7303_write_dac_powerdown()
88 		st->config &= ~AD7303_CFG_POWER_DOWN(chan->channel);  in ad7303_write_dac_powerdown()
92 	ad7303_write(st, chan->channel, st->dac_cache[chan->channel]);  in ad7303_write_dac_powerdown()
98 static int ad7303_get_vref(struct ad7303_state *st,  in ad7303_get_vref()  argument
103 	if (st->config & AD7303_CFG_EXTERNAL_VREF)  in ad7303_get_vref()
104 		return regulator_get_voltage(st->vref_reg);  in ad7303_get_vref()
106 	ret = regulator_get_voltage(st->vdd_reg);  in ad7303_get_vref()
115 	struct ad7303_state *st = iio_priv(indio_dev);  in ad7303_read_raw()  local
120 		*val = st->dac_cache[chan->channel];  in ad7303_read_raw()
123 		vref_uv = ad7303_get_vref(st, chan);  in ad7303_read_raw()
140 	struct ad7303_state *st = iio_priv(indio_dev);  in ad7303_write_raw()  local
149 		ret = ad7303_write(st, chan->address, val);  in ad7303_write_raw()
151 			st->dac_cache[chan->channel] = val;  in ad7303_write_raw()
203 	struct ad7303_state *st;  in ad7303_probe()  local
207 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7303_probe()
211 	st = iio_priv(indio_dev);  in ad7303_probe()
214 	st->spi = spi;  in ad7303_probe()
216 	st->vdd_reg = devm_regulator_get(&spi->dev, "Vdd");  in ad7303_probe()
217 	if (IS_ERR(st->vdd_reg))  in ad7303_probe()
218 		return PTR_ERR(st->vdd_reg);  in ad7303_probe()
220 	ret = regulator_enable(st->vdd_reg);  in ad7303_probe()
236 		st->vref_reg = devm_regulator_get(&spi->dev, "REF");  in ad7303_probe()
237 		if (IS_ERR(st->vref_reg)) {  in ad7303_probe()
238 			ret = PTR_ERR(st->vref_reg);  in ad7303_probe()
242 		ret = regulator_enable(st->vref_reg);  in ad7303_probe()
246 		st->config |= AD7303_CFG_EXTERNAL_VREF;  in ad7303_probe()
263 	if (st->vref_reg)  in ad7303_probe()
264 		regulator_disable(st->vref_reg);  in ad7303_probe()
266 	regulator_disable(st->vdd_reg);  in ad7303_probe()
273 	struct ad7303_state *st = iio_priv(indio_dev);  in ad7303_remove()  local
277 	if (st->vref_reg)  in ad7303_remove()
278 		regulator_disable(st->vref_reg);  in ad7303_remove()
279 	regulator_disable(st->vdd_reg);  in ad7303_remove()