1 // SPDX-License-Identifier: GPL-2.0+
198 		.name = "ad7124-4",
203 		.name = "ad7124-8",
219 		diff_new = abs(val - array[i]);  in ad7124_find_closest_match()
238 	ret = ad_sd_read_reg(&st->sd, addr, bytes, &readval);  in ad7124_spi_write_mask()
245 	return ad_sd_write_reg(&st->sd, addr, bytes, readval);  in ad7124_spi_write_mask()
253 	st->adc_control &= ~AD7124_ADC_CTRL_MODE_MSK;  in ad7124_set_mode()
254 	st->adc_control |= AD7124_ADC_CTRL_MODE(mode);  in ad7124_set_mode()
256 	return ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL, 2, st->adc_control);  in ad7124_set_mode()
263 	fclk = clk_get_rate(st->mclk);  in ad7124_set_channel_odr()
277 	if (odr_sel_bits != st->channels[channel].cfg.odr_sel_bits)  in ad7124_set_channel_odr()
278 		st->channels[channel].cfg.live = false;  in ad7124_set_channel_odr()
281 	st->channels[channel].cfg.odr = DIV_ROUND_CLOSEST(fclk, odr_sel_bits * 32);  in ad7124_set_channel_odr()
282 	st->channels[channel].cfg.odr_sel_bits = odr_sel_bits;  in ad7124_set_channel_odr()
290 	fadc = st->channels[channel].cfg.odr;  in ad7124_get_3db_filter_freq()
292 	switch (st->channels[channel].cfg.filter_type) {  in ad7124_get_3db_filter_freq()
298 		return -EINVAL;  in ad7124_get_3db_filter_freq()
321 	if (new_odr != st->channels[channel].cfg.odr)  in ad7124_set_3db_filter_freq()
322 		st->channels[channel].cfg.live = false;  in ad7124_set_3db_filter_freq()
324 	st->channels[channel].cfg.filter_type = new_filter;  in ad7124_set_3db_filter_freq()
325 	st->channels[channel].cfg.odr = new_odr;  in ad7124_set_3db_filter_freq()
335 	cmp_size = (u8 *)&cfg->live - (u8 *)cfg;  in ad7124_find_similar_live_cfg()
336 	for (i = 0; i < st->num_channels; i++) {  in ad7124_find_similar_live_cfg()
337 		cfg_aux = &st->channels[i].cfg;  in ad7124_find_similar_live_cfg()
339 		if (cfg_aux->live && !memcmp(cfg, cfg_aux, cmp_size))  in ad7124_find_similar_live_cfg()
350 	free_cfg_slot = find_next_zero_bit(&st->cfg_slots_status, AD7124_MAX_CONFIGS, 0);  in ad7124_find_free_config_slot()
352 		return -1;  in ad7124_find_free_config_slot()
359 	unsigned int refsel = cfg->refsel;  in ad7124_init_config_vref()
365 		if (IS_ERR(st->vref[refsel])) {  in ad7124_init_config_vref()
366 			dev_err(&st->sd.spi->dev,  in ad7124_init_config_vref()
369 			return PTR_ERR(st->vref[refsel]);  in ad7124_init_config_vref()
371 		cfg->vref_mv = regulator_get_voltage(st->vref[refsel]);  in ad7124_init_config_vref()
373 		cfg->vref_mv /= 1000;  in ad7124_init_config_vref()
376 		cfg->vref_mv = 2500;  in ad7124_init_config_vref()
377 		st->adc_control &= ~AD7124_ADC_CTRL_REF_EN_MSK;  in ad7124_init_config_vref()
378 		st->adc_control |= AD7124_ADC_CTRL_REF_EN(1);  in ad7124_init_config_vref()
379 		return ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL,  in ad7124_init_config_vref()
380 				      2, st->adc_control);  in ad7124_init_config_vref()
382 		dev_err(&st->sd.spi->dev, "Invalid reference %d\n", refsel);  in ad7124_init_config_vref()
383 		return -EINVAL;  in ad7124_init_config_vref()
394 	cfg->cfg_slot = cfg_slot;  in ad7124_write_config()
396 	tmp = (cfg->buf_positive << 1) + cfg->buf_negative;  in ad7124_write_config()
397 	val = AD7124_CONFIG_BIPOLAR(cfg->bipolar) | AD7124_CONFIG_REF_SEL(cfg->refsel) |  in ad7124_write_config()
399 	ret = ad_sd_write_reg(&st->sd, AD7124_CONFIG(cfg->cfg_slot), 2, val);  in ad7124_write_config()
403 	tmp = AD7124_FILTER_TYPE_SEL(cfg->filter_type);  in ad7124_write_config()
404 	ret = ad7124_spi_write_mask(st, AD7124_FILTER(cfg->cfg_slot), AD7124_FILTER_TYPE_MSK,  in ad7124_write_config()
409 	ret = ad7124_spi_write_mask(st, AD7124_FILTER(cfg->cfg_slot), AD7124_FILTER_FS_MSK,  in ad7124_write_config()
410 				    AD7124_FILTER_FS(cfg->odr_sel_bits), 3);  in ad7124_write_config()
414 	return ad7124_spi_write_mask(st, AD7124_CONFIG(cfg->cfg_slot), AD7124_CONFIG_PGA_MSK,  in ad7124_write_config()
415 				     AD7124_CONFIG_PGA(cfg->pga_bits), 2);  in ad7124_write_config()
429 	ret = kfifo_get(&st->live_cfgs_fifo, &lru_cfg);  in ad7124_pop_config()
433 	lru_cfg->live = false;  in ad7124_pop_config()
436 	assign_bit(lru_cfg->cfg_slot, &st->cfg_slots_status, 0);  in ad7124_pop_config()
439 	for (i = 0; i < st->num_channels; i++) {  in ad7124_pop_config()
440 		cfg = &st->channels[i].cfg;  in ad7124_pop_config()
442 		if (cfg->cfg_slot == lru_cfg->cfg_slot)  in ad7124_pop_config()
443 			cfg->live = false;  in ad7124_pop_config()
457 		kfifo_put(&st->live_cfgs_fifo, cfg);  in ad7124_push_config()
462 			return -EINVAL;  in ad7124_push_config()
465 		free_cfg_slot = lru_cfg->cfg_slot;  in ad7124_push_config()
466 		kfifo_put(&st->live_cfgs_fifo, cfg);  in ad7124_push_config()
470 	assign_bit(free_cfg_slot, &st->cfg_slots_status, 1);  in ad7124_push_config()
477 	ch->cfg.live = true;  in ad7124_enable_channel()
478 	return ad_sd_write_reg(&st->sd, AD7124_CHANNEL(ch->nr), 2, ch->ain |  in ad7124_enable_channel()
479 			      AD7124_CHANNEL_SETUP(ch->cfg.cfg_slot) | AD7124_CHANNEL_EN(1));  in ad7124_enable_channel()
484 	struct ad7124_channel_config *cfg = &st->channels[address].cfg;  in ad7124_prepare_read()
491 	if (!cfg->live) {  in ad7124_prepare_read()
497 			cfg->cfg_slot = live_cfg->cfg_slot;  in ad7124_prepare_read()
501 	return ad7124_enable_channel(st, &st->channels[address]);  in ad7124_prepare_read()
509 	mutex_lock(&st->cfgs_lock);  in ad7124_set_channel()
511 	mutex_unlock(&st->cfgs_lock);  in ad7124_set_channel()
540 		ret = ad_sd_write_reg(&st->sd, AD7124_CHANNEL(chan->address), 2,  in ad7124_read_raw()
541 				      st->channels[chan->address].ain | AD7124_CHANNEL_EN(0));  in ad7124_read_raw()
547 		mutex_lock(&st->cfgs_lock);  in ad7124_read_raw()
549 		idx = st->channels[chan->address].cfg.pga_bits;  in ad7124_read_raw()
550 		*val = st->channels[chan->address].cfg.vref_mv;  in ad7124_read_raw()
551 		if (st->channels[chan->address].cfg.bipolar)  in ad7124_read_raw()
552 			*val2 = chan->scan_type.realbits - 1 + idx;  in ad7124_read_raw()
554 			*val2 = chan->scan_type.realbits + idx;  in ad7124_read_raw()
556 		mutex_unlock(&st->cfgs_lock);  in ad7124_read_raw()
559 		mutex_lock(&st->cfgs_lock);  in ad7124_read_raw()
560 		if (st->channels[chan->address].cfg.bipolar)  in ad7124_read_raw()
561 			*val = -(1 << (chan->scan_type.realbits - 1));  in ad7124_read_raw()
565 		mutex_unlock(&st->cfgs_lock);  in ad7124_read_raw()
568 		mutex_lock(&st->cfgs_lock);  in ad7124_read_raw()
569 		*val = st->channels[chan->address].cfg.odr;  in ad7124_read_raw()
570 		mutex_unlock(&st->cfgs_lock);  in ad7124_read_raw()
574 		mutex_lock(&st->cfgs_lock);  in ad7124_read_raw()
575 		*val = ad7124_get_3db_filter_freq(st, chan->scan_index);  in ad7124_read_raw()
576 		mutex_unlock(&st->cfgs_lock);  in ad7124_read_raw()
580 		return -EINVAL;  in ad7124_read_raw()
592 	mutex_lock(&st->cfgs_lock);  in ad7124_write_raw()
597 			ret = -EINVAL;  in ad7124_write_raw()
601 		ad7124_set_channel_odr(st, chan->address, val);  in ad7124_write_raw()
605 			ret = -EINVAL;  in ad7124_write_raw()
609 		if (st->channels[chan->address].cfg.bipolar)  in ad7124_write_raw()
610 			full_scale = 1 << (chan->scan_type.realbits - 1);  in ad7124_write_raw()
612 			full_scale = 1 << chan->scan_type.realbits;  in ad7124_write_raw()
614 		vref = st->channels[chan->address].cfg.vref_mv * 1000000LL;  in ad7124_write_raw()
619 		if (st->channels[chan->address].cfg.pga_bits != res)  in ad7124_write_raw()
620 			st->channels[chan->address].cfg.live = false;  in ad7124_write_raw()
622 		st->channels[chan->address].cfg.pga_bits = res;  in ad7124_write_raw()
626 			ret = -EINVAL;  in ad7124_write_raw()
630 		ad7124_set_3db_filter_freq(st, chan->address, val);  in ad7124_write_raw()
633 		ret =  -EINVAL;  in ad7124_write_raw()
636 	mutex_unlock(&st->cfgs_lock);  in ad7124_write_raw()
649 		return -EINVAL;  in ad7124_reg_access()
652 		ret = ad_sd_read_reg(&st->sd, reg, ad7124_reg_size[reg],  in ad7124_reg_access()
655 		ret = ad_sd_write_reg(&st->sd, reg, ad7124_reg_size[reg],  in ad7124_reg_access()
686 	ret = ad_sd_reset(&st->sd, 64);  in ad7124_soft_reset()
692 		ret = ad_sd_read_reg(&st->sd, AD7124_STATUS, 1, &readval);  in ad7124_soft_reset()
701 	} while (--timeout);  in ad7124_soft_reset()
703 	dev_err(&st->sd.spi->dev, "Soft reset failed\n");  in ad7124_soft_reset()
705 	return -EIO;  in ad7124_soft_reset()
713 	ret = ad_sd_read_reg(&st->sd, AD7124_ID, 1, &readval);  in ad7124_check_chip_id()
720 	if (chip_id != st->chip_info->chip_id) {  in ad7124_check_chip_id()
721 		dev_err(&st->sd.spi->dev,  in ad7124_check_chip_id()
723 			st->chip_info->chip_id, chip_id);  in ad7124_check_chip_id()
724 		return -ENODEV;  in ad7124_check_chip_id()
728 		dev_err(&st->sd.spi->dev,  in ad7124_check_chip_id()
730 		return -ENODEV;  in ad7124_check_chip_id()
747 	st->num_channels = of_get_available_child_count(np);  in ad7124_of_parse_channel_config()
748 	if (!st->num_channels) {  in ad7124_of_parse_channel_config()
749 		dev_err(indio_dev->dev.parent, "no channel children\n");  in ad7124_of_parse_channel_config()
750 		return -ENODEV;  in ad7124_of_parse_channel_config()
753 	chan = devm_kcalloc(indio_dev->dev.parent, st->num_channels,  in ad7124_of_parse_channel_config()
756 		return -ENOMEM;  in ad7124_of_parse_channel_config()
758 	channels = devm_kcalloc(indio_dev->dev.parent, st->num_channels, sizeof(*channels),  in ad7124_of_parse_channel_config()
761 		return -ENOMEM;  in ad7124_of_parse_channel_config()
763 	indio_dev->channels = chan;  in ad7124_of_parse_channel_config()
764 	indio_dev->num_channels = st->num_channels;  in ad7124_of_parse_channel_config()
765 	st->channels = channels;  in ad7124_of_parse_channel_config()
768 		cfg = &st->channels[channel].cfg;  in ad7124_of_parse_channel_config()
774 		if (channel >= indio_dev->num_channels) {  in ad7124_of_parse_channel_config()
775 			dev_err(indio_dev->dev.parent,  in ad7124_of_parse_channel_config()
777 			ret = -EINVAL;  in ad7124_of_parse_channel_config()
781 		ret = of_property_read_u32_array(child, "diff-channels",  in ad7124_of_parse_channel_config()
786 		st->channels[channel].nr = channel;  in ad7124_of_parse_channel_config()
787 		st->channels[channel].ain = AD7124_CHANNEL_AINP(ain[0]) |  in ad7124_of_parse_channel_config()
790 		cfg->bipolar = of_property_read_bool(child, "bipolar");  in ad7124_of_parse_channel_config()
792 		ret = of_property_read_u32(child, "adi,reference-select", &tmp);  in ad7124_of_parse_channel_config()
794 			cfg->refsel = AD7124_INT_REF;  in ad7124_of_parse_channel_config()
796 			cfg->refsel = tmp;  in ad7124_of_parse_channel_config()
798 		cfg->buf_positive = of_property_read_bool(child, "adi,buffered-positive");  in ad7124_of_parse_channel_config()
799 		cfg->buf_negative = of_property_read_bool(child, "adi,buffered-negative");  in ad7124_of_parse_channel_config()
820 	fclk = clk_get_rate(st->mclk);  in ad7124_setup()
822 		return -EINVAL;  in ad7124_setup()
829 		ret = clk_set_rate(st->mclk, fclk);  in ad7124_setup()
835 	st->adc_control &= ~AD7124_ADC_CTRL_PWR_MSK;  in ad7124_setup()
836 	st->adc_control |= AD7124_ADC_CTRL_PWR(power_mode);  in ad7124_setup()
837 	ret = ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL, 2, st->adc_control);  in ad7124_setup()
841 	mutex_init(&st->cfgs_lock);  in ad7124_setup()
842 	INIT_KFIFO(st->live_cfgs_fifo);  in ad7124_setup()
843 	for (i = 0; i < st->num_channels; i++) {  in ad7124_setup()
845 		ret = ad7124_init_config_vref(st, &st->channels[i].cfg);  in ad7124_setup()
877 	info = of_device_get_match_data(&spi->dev);  in ad7124_probe()
879 		return -ENODEV;  in ad7124_probe()
881 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7124_probe()
883 		return -ENOMEM;  in ad7124_probe()
887 	st->chip_info = info;  in ad7124_probe()
889 	ad_sd_init(&st->sd, indio_dev, spi, &ad7124_sigma_delta_info);  in ad7124_probe()
891 	indio_dev->name = st->chip_info->name;  in ad7124_probe()
892 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7124_probe()
893 	indio_dev->info = &ad7124_info;  in ad7124_probe()
895 	ret = ad7124_of_parse_channel_config(indio_dev, spi->dev.of_node);  in ad7124_probe()
899 	for (i = 0; i < ARRAY_SIZE(st->vref); i++) {  in ad7124_probe()
903 		st->vref[i] = devm_regulator_get_optional(&spi->dev,  in ad7124_probe()
905 		if (PTR_ERR(st->vref[i]) == -ENODEV)  in ad7124_probe()
907 		else if (IS_ERR(st->vref[i]))  in ad7124_probe()
908 			return PTR_ERR(st->vref[i]);  in ad7124_probe()
910 		ret = regulator_enable(st->vref[i]);  in ad7124_probe()
914 		ret = devm_add_action_or_reset(&spi->dev, ad7124_reg_disable,  in ad7124_probe()
915 					       st->vref[i]);  in ad7124_probe()
920 	st->mclk = devm_clk_get(&spi->dev, "mclk");  in ad7124_probe()
921 	if (IS_ERR(st->mclk))  in ad7124_probe()
922 		return PTR_ERR(st->mclk);  in ad7124_probe()
924 	ret = clk_prepare_enable(st->mclk);  in ad7124_probe()
928 	ret = devm_add_action_or_reset(&spi->dev, ad7124_clk_disable, st->mclk);  in ad7124_probe()
944 	ret = devm_ad_sd_setup_buffer_and_trigger(&spi->dev, indio_dev);  in ad7124_probe()
948 	return devm_iio_device_register(&spi->dev, indio_dev);  in ad7124_probe()
953 	{ .compatible = "adi,ad7124-4",
955 	{ .compatible = "adi,ad7124-8",