186 static int ad5758_spi_reg_read(struct ad5758_state *st, unsigned int addr)  in ad5758_spi_reg_read()  argument
190 			.tx_buf = &st->d32[0],  in ad5758_spi_reg_read()
194 			.tx_buf = &st->d32[1],  in ad5758_spi_reg_read()
195 			.rx_buf = &st->d32[2],  in ad5758_spi_reg_read()
201 	st->d32[0] = cpu_to_be32(  in ad5758_spi_reg_read()
204 	st->d32[1] = cpu_to_be32(AD5758_WR_FLAG_MSK(AD5758_NOP) << 24);  in ad5758_spi_reg_read()
206 	ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t));  in ad5758_spi_reg_read()
210 	return (be32_to_cpu(st->d32[2]) >> 8) & 0xFFFF;  in ad5758_spi_reg_read()
213 static int ad5758_spi_reg_write(struct ad5758_state *st,  in ad5758_spi_reg_write()  argument
217 	st->d32[0] = cpu_to_be32((AD5758_WR_FLAG_MSK(addr) << 24) |  in ad5758_spi_reg_write()
220 	return spi_write(st->spi, &st->d32[0], sizeof(st->d32[0]));  in ad5758_spi_reg_write()
223 static int ad5758_spi_write_mask(struct ad5758_state *st,  in ad5758_spi_write_mask()  argument
230 	regval = ad5758_spi_reg_read(st, addr);  in ad5758_spi_write_mask()
237 	return ad5758_spi_reg_write(st, addr, regval);  in ad5758_spi_write_mask()
258 static int ad5758_wait_for_task_complete(struct ad5758_state *st,  in ad5758_wait_for_task_complete()  argument
267 		ret = ad5758_spi_reg_read(st, reg);  in ad5758_wait_for_task_complete()
277 	dev_err(&st->spi->dev,  in ad5758_wait_for_task_complete()
283 static int ad5758_calib_mem_refresh(struct ad5758_state *st)  in ad5758_calib_mem_refresh()  argument
287 	ret = ad5758_spi_reg_write(st, AD5758_KEY,  in ad5758_calib_mem_refresh()
290 		dev_err(&st->spi->dev,  in ad5758_calib_mem_refresh()
296 	return ad5758_wait_for_task_complete(st, AD5758_DIGITAL_DIAG_RESULTS,  in ad5758_calib_mem_refresh()
300 static int ad5758_soft_reset(struct ad5758_state *st)  in ad5758_soft_reset()  argument
304 	ret = ad5758_spi_reg_write(st, AD5758_KEY, AD5758_KEY_CODE_RESET_1);  in ad5758_soft_reset()
308 	ret = ad5758_spi_reg_write(st, AD5758_KEY, AD5758_KEY_CODE_RESET_2);  in ad5758_soft_reset()
316 static int ad5758_set_dc_dc_conv_mode(struct ad5758_state *st,  in ad5758_set_dc_dc_conv_mode()  argument
326 		ret  = ad5758_spi_write_mask(st, AD5758_ADC_CONFIG,  in ad5758_set_dc_dc_conv_mode()
333 	ret = ad5758_spi_write_mask(st, AD5758_DCDC_CONFIG1,  in ad5758_set_dc_dc_conv_mode()
343 	ret = ad5758_wait_for_task_complete(st, AD5758_DCDC_CONFIG2,  in ad5758_set_dc_dc_conv_mode()
348 	st->dc_dc_mode = mode;  in ad5758_set_dc_dc_conv_mode()
353 static int ad5758_set_dc_dc_ilim(struct ad5758_state *st, unsigned int ilim)  in ad5758_set_dc_dc_ilim()  argument
357 	ret = ad5758_spi_write_mask(st, AD5758_DCDC_CONFIG2,  in ad5758_set_dc_dc_ilim()
366 	return ad5758_wait_for_task_complete(st, AD5758_DCDC_CONFIG2,  in ad5758_set_dc_dc_ilim()
370 static int ad5758_slew_rate_set(struct ad5758_state *st,  in ad5758_slew_rate_set()  argument
385 	ret = ad5758_spi_write_mask(st, AD5758_DAC_CONFIG, mask, mode);  in ad5758_slew_rate_set()
390 	return ad5758_wait_for_task_complete(st, AD5758_DIGITAL_DIAG_RESULTS,  in ad5758_slew_rate_set()
394 static int ad5758_slew_rate_config(struct ad5758_state *st)  in ad5758_slew_rate_config()  argument
419 		do_div(sr_step, st->slew_time);  in ad5758_slew_rate_config()
436 		diff_new = abs(st->slew_time - calc_slew_time);  in ad5758_slew_rate_config()
444 	return ad5758_slew_rate_set(st, sr_clk_idx, sr_step_idx);  in ad5758_slew_rate_config()
447 static int ad5758_set_out_range(struct ad5758_state *st, int range)  in ad5758_set_out_range()  argument
451 	ret = ad5758_spi_write_mask(st, AD5758_DAC_CONFIG,  in ad5758_set_out_range()
458 	return ad5758_wait_for_task_complete(st, AD5758_DIGITAL_DIAG_RESULTS,  in ad5758_set_out_range()
462 static int ad5758_internal_buffers_en(struct ad5758_state *st, bool enable)  in ad5758_internal_buffers_en()  argument
466 	ret = ad5758_spi_write_mask(st, AD5758_DAC_CONFIG,  in ad5758_internal_buffers_en()
473 	return ad5758_wait_for_task_complete(st, AD5758_DIGITAL_DIAG_RESULTS,  in ad5758_internal_buffers_en()
477 static int ad5758_reset(struct ad5758_state *st)  in ad5758_reset()  argument
479 	if (st->gpio_reset) {  in ad5758_reset()
480 		gpiod_set_value(st->gpio_reset, 0);  in ad5758_reset()
482 		gpiod_set_value(st->gpio_reset, 1);  in ad5758_reset()
488 		return ad5758_soft_reset(st);  in ad5758_reset()
497 	struct ad5758_state *st = iio_priv(indio_dev);  in ad5758_reg_access()  local
500 	mutex_lock(&st->lock);  in ad5758_reg_access()
502 		ret = ad5758_spi_reg_read(st, reg);  in ad5758_reg_access()
504 			mutex_unlock(&st->lock);  in ad5758_reg_access()
511 		ret = ad5758_spi_reg_write(st, reg, writeval);  in ad5758_reg_access()
513 	mutex_unlock(&st->lock);  in ad5758_reg_access()
522 	struct ad5758_state *st = iio_priv(indio_dev);  in ad5758_read_raw()  local
527 		mutex_lock(&st->lock);  in ad5758_read_raw()
528 		ret = ad5758_spi_reg_read(st, AD5758_DAC_INPUT);  in ad5758_read_raw()
529 		mutex_unlock(&st->lock);  in ad5758_read_raw()
536 		min = st->out_range.min;  in ad5758_read_raw()
537 		max = st->out_range.max;  in ad5758_read_raw()
542 		min = st->out_range.min;  in ad5758_read_raw()
543 		max = st->out_range.max;  in ad5758_read_raw()
555 	struct ad5758_state *st = iio_priv(indio_dev);  in ad5758_write_raw()  local
560 		mutex_lock(&st->lock);  in ad5758_write_raw()
561 		ret = ad5758_spi_reg_write(st, AD5758_DAC_INPUT, val);  in ad5758_write_raw()
562 		mutex_unlock(&st->lock);  in ad5758_write_raw()
574 	struct ad5758_state *st = iio_priv(indio_dev);  in ad5758_read_powerdown()  local
576 	return sysfs_emit(buf, "%d\n", st->pwr_down);  in ad5758_read_powerdown()
584 	struct ad5758_state *st = iio_priv(indio_dev);  in ad5758_write_powerdown()  local
594 	mutex_lock(&st->lock);  in ad5758_write_powerdown()
605 	ret = ad5758_spi_write_mask(st, AD5758_DAC_CONFIG,  in ad5758_write_powerdown()
611 	st->pwr_down = pwr_down;  in ad5758_write_powerdown()
614 	mutex_unlock(&st->lock);  in ad5758_write_powerdown()
665 static int ad5758_crc_disable(struct ad5758_state *st)  in ad5758_crc_disable()  argument
670 	st->d32[0] = cpu_to_be32(mask);  in ad5758_crc_disable()
672 	return spi_write(st->spi, &st->d32[0], 4);  in ad5758_crc_disable()
675 static int ad5758_find_out_range(struct ad5758_state *st,  in ad5758_find_out_range()  argument
684 			st->out_range.reg = range[i].reg;  in ad5758_find_out_range()
685 			st->out_range.min = range[i].min;  in ad5758_find_out_range()
686 			st->out_range.max = range[i].max;  in ad5758_find_out_range()
695 static int ad5758_parse_dt(struct ad5758_state *st)  in ad5758_parse_dt()  argument
701 	st->dc_dc_ilim = 0;  in ad5758_parse_dt()
702 	ret = device_property_read_u32(&st->spi->dev,  in ad5758_parse_dt()
705 		dev_dbg(&st->spi->dev,  in ad5758_parse_dt()
712 			dev_dbg(&st->spi->dev, "dc-dc-ilim out of range\n");  in ad5758_parse_dt()
714 			st->dc_dc_ilim = index - ad5758_dc_dc_ilim;  in ad5758_parse_dt()
717 	ret = device_property_read_u32(&st->spi->dev, "adi,dc-dc-mode",  in ad5758_parse_dt()
718 				       &st->dc_dc_mode);  in ad5758_parse_dt()
720 		dev_err(&st->spi->dev, "Missing \"dc-dc-mode\" property\n");  in ad5758_parse_dt()
724 	if (!ad5758_is_valid_mode(st->dc_dc_mode))  in ad5758_parse_dt()
727 	if (st->dc_dc_mode == AD5758_DCDC_MODE_DPC_VOLTAGE) {  in ad5758_parse_dt()
728 		ret = device_property_read_u32_array(&st->spi->dev,  in ad5758_parse_dt()
732 			dev_err(&st->spi->dev,  in ad5758_parse_dt()
739 		ret = device_property_read_u32_array(&st->spi->dev,  in ad5758_parse_dt()
743 			dev_err(&st->spi->dev,  in ad5758_parse_dt()
751 	ret = ad5758_find_out_range(st, range, size, tmparray[0], tmparray[1]);  in ad5758_parse_dt()
753 		dev_err(&st->spi->dev, "range invalid\n");  in ad5758_parse_dt()
757 	ret = device_property_read_u32(&st->spi->dev, "adi,slew-time-us", &tmp);  in ad5758_parse_dt()
759 		dev_dbg(&st->spi->dev, "Missing \"slew-time-us\" property\n");  in ad5758_parse_dt()
760 		st->slew_time = 0;  in ad5758_parse_dt()
762 		st->slew_time = tmp;  in ad5758_parse_dt()
768 static int ad5758_init(struct ad5758_state *st)  in ad5758_init()  argument
772 	st->gpio_reset = devm_gpiod_get_optional(&st->spi->dev, "reset",  in ad5758_init()
774 	if (IS_ERR(st->gpio_reset))  in ad5758_init()
775 		return PTR_ERR(st->gpio_reset);  in ad5758_init()
778 	ret = ad5758_crc_disable(st);  in ad5758_init()
783 	ret = ad5758_reset(st);  in ad5758_init()
788 	ret = ad5758_crc_disable(st);  in ad5758_init()
793 	ret = ad5758_calib_mem_refresh(st);  in ad5758_init()
797 	regval = ad5758_spi_reg_read(st, AD5758_DIGITAL_DIAG_RESULTS);  in ad5758_init()
802 	ret = ad5758_spi_reg_write(st, AD5758_DIGITAL_DIAG_RESULTS, regval);  in ad5758_init()
807 	ret = ad5758_set_dc_dc_ilim(st, st->dc_dc_ilim);  in ad5758_init()
812 	ret = ad5758_set_dc_dc_conv_mode(st, st->dc_dc_mode);  in ad5758_init()
817 	ret = ad5758_set_out_range(st, st->out_range.reg);  in ad5758_init()
822 	if (st->slew_time) {  in ad5758_init()
823 		ret = ad5758_slew_rate_config(st);  in ad5758_init()
829 	ret = ad5758_internal_buffers_en(st, 1);  in ad5758_init()
834 	return ad5758_spi_write_mask(st, AD5758_DAC_CONFIG,  in ad5758_init()
841 	struct ad5758_state *st;  in ad5758_probe()  local
845 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad5758_probe()
849 	st = iio_priv(indio_dev);  in ad5758_probe()
852 	st->spi = spi;  in ad5758_probe()
854 	mutex_init(&st->lock);  in ad5758_probe()
861 	ret = ad5758_parse_dt(st);  in ad5758_probe()
865 	if (st->dc_dc_mode == AD5758_DCDC_MODE_DPC_VOLTAGE)  in ad5758_probe()
870 	ret = ad5758_init(st);  in ad5758_probe()
876 	return devm_iio_device_register(&st->spi->dev, indio_dev);  in ad5758_probe()