55 static int ad3552r_transfer(struct ad3552r_desc *dac, u8 addr, u32 len,  in ad3552r_transfer()  argument
64 		return spi_write_then_read(dac->spi, buf, 1, data, len);  in ad3552r_transfer()
67 	return spi_write_then_read(dac->spi, buf, len + 1, NULL, 0);  in ad3552r_transfer()
70 static int ad3552r_write_reg(struct ad3552r_desc *dac, u8 addr, u16 val)  in ad3552r_write_reg()  argument
85 	return ad3552r_transfer(dac, addr, reg_len, buf, false);  in ad3552r_write_reg()
88 static int ad3552r_read_reg(struct ad3552r_desc *dac, u8 addr, u16 *val)  in ad3552r_read_reg()  argument
94 	err = ad3552r_transfer(dac, addr, reg_len, buf, true);  in ad3552r_read_reg()
108 static int ad3552r_update_reg_field(struct ad3552r_desc *dac, u8 addr, u16 mask,  in ad3552r_update_reg_field()  argument
114 	ret = ad3552r_read_reg(dac, addr, &reg);  in ad3552r_update_reg_field()
121 	return ad3552r_write_reg(dac, addr, reg);  in ad3552r_update_reg_field()
148 	struct ad3552r_desc *dac = iio_priv(indio_dev);  in ad3552r_read_raw()  local
155 		mutex_lock(&dac->lock);  in ad3552r_read_raw()
156 		err = ad3552r_read_reg(dac, AD3552R_REG_ADDR_CH_DAC_24B(ch),  in ad3552r_read_raw()
158 		mutex_unlock(&dac->lock);  in ad3552r_read_raw()
164 		mutex_lock(&dac->lock);  in ad3552r_read_raw()
165 		err = ad3552r_read_reg(dac, AD3552R_REG_ADDR_POWERDOWN_CONFIG,  in ad3552r_read_raw()
167 		mutex_unlock(&dac->lock);  in ad3552r_read_raw()
174 		*val = dac->ch_data[ch].scale_int;  in ad3552r_read_raw()
175 		*val2 = dac->ch_data[ch].scale_dec;  in ad3552r_read_raw()
178 		*val = dac->ch_data[ch].offset_int;  in ad3552r_read_raw()
179 		*val2 = dac->ch_data[ch].offset_dec;  in ad3552r_read_raw()
192 	struct ad3552r_desc *dac = iio_priv(indio_dev);  in ad3552r_write_raw()  local
195 	mutex_lock(&dac->lock);  in ad3552r_write_raw()
198 		err = ad3552r_write_reg(dac,  in ad3552r_write_raw()
208 		err = ad3552r_update_reg_field(dac, AD3552R_REG_ADDR_POWERDOWN_CONFIG,  in ad3552r_write_raw()
216 	mutex_unlock(&dac->lock);  in ad3552r_write_raw()
235 static int ad3552r_write_all_channels(struct ad3552r_desc *dac, u8 *data)  in ad3552r_write_all_channels()  argument
248 	if (!dac->gpio_ldac) {  in ad3552r_write_all_channels()
253 	err = ad3552r_transfer(dac, addr, len, buff, false);  in ad3552r_write_all_channels()
257 	if (dac->gpio_ldac)  in ad3552r_write_all_channels()
258 		return ad3552r_trigger_hw_ldac(dac->gpio_ldac);  in ad3552r_write_all_channels()
263 static int ad3552r_write_codes(struct ad3552r_desc *dac, u32 mask, u8 *data)  in ad3552r_write_codes()  argument
270 			return ad3552r_write_all_channels(dac, data);  in ad3552r_write_codes()
279 	err = ad3552r_transfer(dac, addr, 3, data, false);  in ad3552r_write_codes()
283 	if (dac->gpio_ldac)  in ad3552r_write_codes()
284 		return ad3552r_trigger_hw_ldac(dac->gpio_ldac);  in ad3552r_write_codes()
286 	return ad3552r_write_reg(dac, AD3552R_REG_ADDR_SW_LDAC_24B, mask);  in ad3552r_write_codes()
294 	struct ad3552r_desc *dac = iio_priv(indio_dev);  in ad3552r_trigger_handler()  local
304 	mutex_lock(&dac->lock);  in ad3552r_trigger_handler()
305 	ad3552r_write_codes(dac, *indio_dev->active_scan_mask, buff);  in ad3552r_trigger_handler()
306 	mutex_unlock(&dac->lock);  in ad3552r_trigger_handler()
313 static int ad3552r_check_scratch_pad(struct ad3552r_desc *dac)  in ad3552r_check_scratch_pad()  argument
320 	err = ad3552r_write_reg(dac, AD3552R_REG_ADDR_SCRATCH_PAD, val1);  in ad3552r_check_scratch_pad()
324 	err = ad3552r_read_reg(dac, AD3552R_REG_ADDR_SCRATCH_PAD, &val);  in ad3552r_check_scratch_pad()
331 	err = ad3552r_write_reg(dac, AD3552R_REG_ADDR_SCRATCH_PAD, val2);  in ad3552r_check_scratch_pad()
335 	err = ad3552r_read_reg(dac, AD3552R_REG_ADDR_SCRATCH_PAD, &val);  in ad3552r_check_scratch_pad()
346 	struct ad3552r_desc *dac;  member
355 	err = ad3552r_read_reg(addr->dac, addr->addr, &val);  in ad3552r_read_reg_wrapper()
362 static int ad3552r_reset(struct ad3552r_desc *dac)  in ad3552r_reset()  argument
368 	dac->gpio_reset = devm_gpiod_get_optional(&dac->spi->dev, "reset",  in ad3552r_reset()
370 	if (IS_ERR(dac->gpio_reset))  in ad3552r_reset()
371 		return dev_err_probe(&dac->spi->dev, PTR_ERR(dac->gpio_reset),  in ad3552r_reset()
374 	if (dac->gpio_reset) {  in ad3552r_reset()
377 		gpiod_set_value_cansleep(dac->gpio_reset, 1);  in ad3552r_reset()
380 		ret = ad3552r_update_reg_field(dac,  in ad3552r_reset()
389 	addr.dac = dac;  in ad3552r_reset()
398 		dev_err(&dac->spi->dev, "Error while resetting");  in ad3552r_reset()
409 		dev_err(&dac->spi->dev, "Error while resetting");  in ad3552r_reset()
413 	return ad3552r_update_reg_field(dac,  in ad3552r_reset()
419 static int ad3552r_configure_custom_gain(struct ad3552r_desc *dac,  in ad3552r_configure_custom_gain()  argument
423 	struct device *dev = &dac->spi->dev;  in ad3552r_configure_custom_gain()
429 				      &dac->ch_data[ch].p,  in ad3552r_configure_custom_gain()
430 				      &dac->ch_data[ch].n,  in ad3552r_configure_custom_gain()
431 				      &dac->ch_data[ch].rfb,  in ad3552r_configure_custom_gain()
432 				      &dac->ch_data[ch].gain_offset);  in ad3552r_configure_custom_gain()
436 	dac->ch_data[ch].range_override = 1;  in ad3552r_configure_custom_gain()
439 	err = ad3552r_write_reg(dac, addr,  in ad3552r_configure_custom_gain()
440 				abs((s32)dac->ch_data[ch].gain_offset) &  in ad3552r_configure_custom_gain()
445 	reg = ad3552r_calc_custom_gain(dac->ch_data[ch].p, dac->ch_data[ch].n,  in ad3552r_configure_custom_gain()
446 				       dac->ch_data[ch].gain_offset);  in ad3552r_configure_custom_gain()
448 	err = ad3552r_write_reg(dac, addr, reg);  in ad3552r_configure_custom_gain()
455 static int ad3552r_configure_device(struct ad3552r_desc *dac)  in ad3552r_configure_device()  argument
457 	struct device *dev = &dac->spi->dev;  in ad3552r_configure_device()
461 	dac->gpio_ldac = devm_gpiod_get_optional(dev, "ldac", GPIOD_OUT_HIGH);  in ad3552r_configure_device()
462 	if (IS_ERR(dac->gpio_ldac))  in ad3552r_configure_device()
463 		return dev_err_probe(dev, PTR_ERR(dac->gpio_ldac),  in ad3552r_configure_device()
470 	err = ad3552r_update_reg_field(dac,  in ad3552r_configure_device()
479 		err = ad3552r_update_reg_field(dac,  in ad3552r_configure_device()
487 	dac->num_ch = device_get_child_node_count(dev);  in ad3552r_configure_device()
488 	if (!dac->num_ch) {  in ad3552r_configure_device()
498 		if (ch >= dac->model_data->num_hw_channels)  in ad3552r_configure_device()
501 					     dac->model_data->num_hw_channels);  in ad3552r_configure_device()
503 		err = ad3552r_get_output_range(dev, dac->model_data,  in ad3552r_configure_device()
514 			err = ad3552r_update_reg_field(dac,  in ad3552r_configure_device()
521 			dac->ch_data[ch].range = val;  in ad3552r_configure_device()
522 		} else if (dac->model_data->requires_output_range) {  in ad3552r_configure_device()
525 					     dac->model_data->model_name);  in ad3552r_configure_device()
527 			err = ad3552r_configure_custom_gain(dac, child, ch);  in ad3552r_configure_device()
532 		ad3552r_calc_gain_and_offset(&dac->ch_data[ch], dac->model_data);  in ad3552r_configure_device()
533 		dac->enabled_ch |= BIT(ch);  in ad3552r_configure_device()
540 		err = ad3552r_update_reg_field(dac,  in ad3552r_configure_device()
546 		dac->channels[cnt] = AD3552R_CH_DAC(ch);  in ad3552r_configure_device()
552 	for_each_clear_bit(ch, &dac->enabled_ch,  in ad3552r_configure_device()
553 			   dac->model_data->num_hw_channels) {  in ad3552r_configure_device()
559 		err = ad3552r_update_reg_field(dac,  in ad3552r_configure_device()
567 	dac->num_ch = cnt;  in ad3552r_configure_device()
572 static int ad3552r_init(struct ad3552r_desc *dac)  in ad3552r_init()  argument
577 	err = ad3552r_reset(dac);  in ad3552r_init()
579 		dev_err(&dac->spi->dev, "Reset failed\n");  in ad3552r_init()
583 	err = ad3552r_check_scratch_pad(dac);  in ad3552r_init()
585 		dev_err(&dac->spi->dev, "Scratch pad test failed\n");  in ad3552r_init()
589 	err = ad3552r_read_reg(dac, AD3552R_REG_ADDR_PRODUCT_ID_L, &val);  in ad3552r_init()
591 		dev_err(&dac->spi->dev, "Fail read PRODUCT_ID_L\n");  in ad3552r_init()
596 	err = ad3552r_read_reg(dac, AD3552R_REG_ADDR_PRODUCT_ID_H, &val);  in ad3552r_init()
598 		dev_err(&dac->spi->dev, "Fail read PRODUCT_ID_H\n");  in ad3552r_init()
603 	if (id != dac->model_data->chip_id) {  in ad3552r_init()
604 		dev_err(&dac->spi->dev, "Product id not matching\n");  in ad3552r_init()
608 	return ad3552r_configure_device(dac);  in ad3552r_init()
613 	struct ad3552r_desc *dac;  in ad3552r_probe()  local
617 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*dac));  in ad3552r_probe()
621 	dac = iio_priv(indio_dev);  in ad3552r_probe()
622 	dac->spi = spi;  in ad3552r_probe()
623 	dac->model_data = spi_get_device_match_data(spi);  in ad3552r_probe()
624 	if (!dac->model_data)  in ad3552r_probe()
627 	mutex_init(&dac->lock);  in ad3552r_probe()
629 	err = ad3552r_init(dac);  in ad3552r_probe()
634 	indio_dev->name = dac->model_data->model_name;  in ad3552r_probe()
637 	indio_dev->num_channels = dac->num_ch;  in ad3552r_probe()
638 	indio_dev->channels = dac->channels;  in ad3552r_probe()