111 static int ad5791_spi_write(struct ad5791_state *st, u8 addr, u32 val)  in ad5791_spi_write()  argument
113 	st->data[0].d32 = cpu_to_be32(AD5791_CMD_WRITE |  in ad5791_spi_write()
117 	return spi_write(st->spi, &st->data[0].d8[1], 3);  in ad5791_spi_write()
120 static int ad5791_spi_read(struct ad5791_state *st, u8 addr, u32 *val)  in ad5791_spi_read()  argument
125 			.tx_buf = &st->data[0].d8[1],  in ad5791_spi_read()
130 			.tx_buf = &st->data[1].d8[1],  in ad5791_spi_read()
131 			.rx_buf = &st->data[2].d8[1],  in ad5791_spi_read()
137 	st->data[0].d32 = cpu_to_be32(AD5791_CMD_READ |  in ad5791_spi_read()
139 	st->data[1].d32 = cpu_to_be32(AD5791_ADDR(AD5791_ADDR_NOOP));  in ad5791_spi_read()
141 	ret = spi_sync_transfer(st->spi, xfers, ARRAY_SIZE(xfers));  in ad5791_spi_read()
143 	*val = be32_to_cpu(st->data[2].d32);  in ad5791_spi_read()
156 	struct ad5791_state *st = iio_priv(indio_dev);  in ad5791_get_powerdown_mode()  local
158 	return st->pwr_down_mode;  in ad5791_get_powerdown_mode()
164 	struct ad5791_state *st = iio_priv(indio_dev);  in ad5791_set_powerdown_mode()  local
166 	st->pwr_down_mode = mode;  in ad5791_set_powerdown_mode()
181 	struct ad5791_state *st = iio_priv(indio_dev);  in ad5791_read_dac_powerdown()  local
183 	return sprintf(buf, "%d\n", st->pwr_down);  in ad5791_read_dac_powerdown()
192 	struct ad5791_state *st = iio_priv(indio_dev);  in ad5791_write_dac_powerdown()  local
199 		st->ctrl &= ~(AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI);  in ad5791_write_dac_powerdown()
201 		if (st->pwr_down_mode == AD5791_DAC_PWRDN_6K)  in ad5791_write_dac_powerdown()
202 			st->ctrl |= AD5791_CTRL_OPGND;  in ad5791_write_dac_powerdown()
203 		else if (st->pwr_down_mode == AD5791_DAC_PWRDN_3STATE)  in ad5791_write_dac_powerdown()
204 			st->ctrl |= AD5791_CTRL_DACTRI;  in ad5791_write_dac_powerdown()
206 	st->pwr_down = pwr_down;  in ad5791_write_dac_powerdown()
208 	ret = ad5791_spi_write(st, AD5791_ADDR_CTRL, st->ctrl);  in ad5791_write_dac_powerdown()
255 	struct ad5791_state *st = iio_priv(indio_dev);  in ad5791_read_raw()  local
261 		ret = ad5791_spi_read(st, chan->address, val);  in ad5791_read_raw()
268 		*val = st->vref_mv;  in ad5791_read_raw()
272 		val64 = (((u64)st->vref_neg_mv) << chan->scan_type.realbits);  in ad5791_read_raw()
273 		do_div(val64, st->vref_mv);  in ad5791_read_raw()
326 	struct ad5791_state *st = iio_priv(indio_dev);  in ad5791_write_raw()  local
333 		return ad5791_spi_write(st, chan->address, val);  in ad5791_write_raw()
350 	struct ad5791_state *st;  in ad5791_probe()  local
353 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad5791_probe()
356 	st = iio_priv(indio_dev);  in ad5791_probe()
357 	st->reg_vdd = devm_regulator_get(&spi->dev, "vdd");  in ad5791_probe()
358 	if (!IS_ERR(st->reg_vdd)) {  in ad5791_probe()
359 		ret = regulator_enable(st->reg_vdd);  in ad5791_probe()
363 		ret = regulator_get_voltage(st->reg_vdd);  in ad5791_probe()
370 	st->reg_vss = devm_regulator_get(&spi->dev, "vss");  in ad5791_probe()
371 	if (!IS_ERR(st->reg_vss)) {  in ad5791_probe()
372 		ret = regulator_enable(st->reg_vss);  in ad5791_probe()
376 		ret = regulator_get_voltage(st->reg_vss);  in ad5791_probe()
383 	st->pwr_down = true;  in ad5791_probe()
384 	st->spi = spi;  in ad5791_probe()
386 	if (!IS_ERR(st->reg_vss) && !IS_ERR(st->reg_vdd)) {  in ad5791_probe()
387 		st->vref_mv = (pos_voltage_uv + neg_voltage_uv) / 1000;  in ad5791_probe()
388 		st->vref_neg_mv = neg_voltage_uv / 1000;  in ad5791_probe()
390 		st->vref_mv = pdata->vref_pos_mv + pdata->vref_neg_mv;  in ad5791_probe()
391 		st->vref_neg_mv = pdata->vref_neg_mv;  in ad5791_probe()
396 	ret = ad5791_spi_write(st, AD5791_ADDR_SW_CTRL, AD5791_SWCTRL_RESET);  in ad5791_probe()
400 	st->chip_info =	&ad5791_chip_info_tbl[spi_get_device_id(spi)  in ad5791_probe()
404 	st->ctrl = AD5761_CTRL_LINCOMP(st->chip_info->get_lin_comp(st->vref_mv))  in ad5791_probe()
408 	ret = ad5791_spi_write(st, AD5791_ADDR_CTRL, st->ctrl |  in ad5791_probe()
420 	indio_dev->name = spi_get_device_id(st->spi)->name;  in ad5791_probe()
428 	if (!IS_ERR(st->reg_vss))  in ad5791_probe()
429 		regulator_disable(st->reg_vss);  in ad5791_probe()
431 	if (!IS_ERR(st->reg_vdd))  in ad5791_probe()
432 		regulator_disable(st->reg_vdd);  in ad5791_probe()
439 	struct ad5791_state *st = iio_priv(indio_dev);  in ad5791_remove()  local
442 	if (!IS_ERR(st->reg_vdd))  in ad5791_remove()
443 		regulator_disable(st->reg_vdd);  in ad5791_remove()
445 	if (!IS_ERR(st->reg_vss))  in ad5791_remove()
446 		regulator_disable(st->reg_vss);  in ad5791_remove()