3  * This file is the ADC part of the STM32 DFSDM driver
11 #include <linux/iio/adc/stm32-dfsdm-adc.h>
79 	/* ADC specific */
318 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_compute_all_osrs()  local
319 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];  in stm32_dfsdm_compute_all_osrs()
339 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_start_channel()  local
340 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_start_channel()
345 	for_each_set_bit(bit, &adc->smask, sizeof(adc->smask) * BITS_PER_BYTE) {  in stm32_dfsdm_start_channel()
359 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_stop_channel()  local
360 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_stop_channel()
364 	for_each_set_bit(bit, &adc->smask, sizeof(adc->smask) * BITS_PER_BYTE) {  in stm32_dfsdm_stop_channel()
394 static int stm32_dfsdm_start_filter(struct stm32_dfsdm_adc *adc,  in stm32_dfsdm_start_filter()  argument
398 	struct stm32_dfsdm *dfsdm = adc->dfsdm;  in stm32_dfsdm_start_filter()
408 	if (adc->nconv > 1 || trig)  in stm32_dfsdm_start_filter()
429 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_filter_set_trig()  local
430 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_filter_set_trig()
458 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_channels_configure()  local
459 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_channels_configure()
460 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[fl_id];  in stm32_dfsdm_channels_configure()
472 	if (adc->nconv == 1 && !trig && iio_buffer_enabled(indio_dev)) {  in stm32_dfsdm_channels_configure()
485 	for_each_set_bit(bit, &adc->smask,  in stm32_dfsdm_channels_configure()
486 			 sizeof(adc->smask) * BITS_PER_BYTE) {  in stm32_dfsdm_channels_configure()
504 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_filter_configure()  local
505 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_filter_configure()
506 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[fl_id];  in stm32_dfsdm_filter_configure()
559 	if (adc->nconv == 1 && !trig) {  in stm32_dfsdm_filter_configure()
560 		bit = __ffs(adc->smask);  in stm32_dfsdm_filter_configure()
573 		for_each_set_bit(bit, &adc->smask,  in stm32_dfsdm_filter_configure()
574 				 sizeof(adc->smask) * BITS_PER_BYTE) {  in stm32_dfsdm_filter_configure()
583 		cr1 = DFSDM_CR1_JSCAN((adc->nconv > 1) ? 1 : 0);  in stm32_dfsdm_filter_configure()
610 					 "st,adc-channels", chan_idx,  in stm32_dfsdm_channel_parse_of()
614 			" Error parsing 'st,adc-channels' for idx %d\n",  in stm32_dfsdm_channel_parse_of()
626 					    "st,adc-channel-names", chan_idx,  in stm32_dfsdm_channel_parse_of()
630 			" Error parsing 'st,adc-channel-names' for idx %d\n",  in stm32_dfsdm_channel_parse_of()
639 					    "st,adc-channel-types", chan_idx,  in stm32_dfsdm_channel_parse_of()
651 					    "st,adc-channel-clk-src", chan_idx,  in stm32_dfsdm_channel_parse_of()
663 					 "st,adc-alt-channel", chan_idx,  in stm32_dfsdm_channel_parse_of()
677 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_generic_channel_parse_of()  local
707 	ret = fwnode_property_read_string(node, "st,adc-channel-type", &of_str);  in stm32_dfsdm_generic_channel_parse_of()
717 	ret = fwnode_property_read_string(node, "st,adc-channel-clk-src", &of_str);  in stm32_dfsdm_generic_channel_parse_of()
727 	ret = fwnode_property_read_u32(node, "st,adc-alt-channel", &df_ch->alt_si);  in stm32_dfsdm_generic_channel_parse_of()
731 	if (adc->dev_data->type == DFSDM_IIO) {  in stm32_dfsdm_generic_channel_parse_of()
736 		adc->backend[ch->scan_index] = backend;  in stm32_dfsdm_generic_channel_parse_of()
747 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in dfsdm_adc_audio_get_spiclk()  local
749 	return snprintf(buf, PAGE_SIZE, "%d\n", adc->spi_freq);  in dfsdm_adc_audio_get_spiclk()
756 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in dfsdm_adc_set_samp_freq()  local
770 	adc->sample_freq = spi_freq / oversamp;  in dfsdm_adc_set_samp_freq()
771 	adc->oversamp = oversamp;  in dfsdm_adc_set_samp_freq()
781 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in dfsdm_adc_audio_set_spiclk()  local
782 	struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel];  in dfsdm_adc_audio_set_spiclk()
783 	unsigned int sample_freq = adc->sample_freq;  in dfsdm_adc_audio_set_spiclk()
804 	adc->spi_freq = spi_freq;  in dfsdm_adc_audio_set_spiclk()
812 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_start_conv()  local
813 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_start_conv()
816 	ret = stm32_dfsdm_channels_configure(indio_dev, adc->fl_id, trig);  in stm32_dfsdm_start_conv()
824 	ret = stm32_dfsdm_filter_configure(indio_dev, adc->fl_id, trig);  in stm32_dfsdm_start_conv()
828 	ret = stm32_dfsdm_start_filter(adc, adc->fl_id, trig);  in stm32_dfsdm_start_conv()
835 	regmap_clear_bits(regmap, DFSDM_CR1(adc->fl_id), DFSDM_CR1_CFG_MASK);  in stm32_dfsdm_start_conv()
844 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_stop_conv()  local
845 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_stop_conv()
847 	stm32_dfsdm_stop_filter(adc->dfsdm, adc->fl_id);  in stm32_dfsdm_stop_conv()
849 	regmap_clear_bits(regmap, DFSDM_CR1(adc->fl_id), DFSDM_CR1_CFG_MASK);  in stm32_dfsdm_stop_conv()
857 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_set_watermark()  local
868 	adc->buf_sz = min(rx_buf_sz, watermark * 2 * adc->nconv);  in stm32_dfsdm_set_watermark()
873 static unsigned int stm32_dfsdm_adc_dma_residue(struct stm32_dfsdm_adc *adc)  in stm32_dfsdm_adc_dma_residue()  argument
878 	status = dmaengine_tx_status(adc->dma_chan,  in stm32_dfsdm_adc_dma_residue()
879 				     adc->dma_chan->cookie,  in stm32_dfsdm_adc_dma_residue()
883 		unsigned int i = adc->buf_sz - state.residue;  in stm32_dfsdm_adc_dma_residue()
887 		if (i >= adc->bufi)  in stm32_dfsdm_adc_dma_residue()
888 			size = i - adc->bufi;  in stm32_dfsdm_adc_dma_residue()
890 			size = adc->buf_sz + i - adc->bufi;  in stm32_dfsdm_adc_dma_residue()
898 static inline void stm32_dfsdm_process_data(struct stm32_dfsdm_adc *adc,  in stm32_dfsdm_process_data()  argument
901 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];  in stm32_dfsdm_process_data()
903 	unsigned int i = adc->nconv;  in stm32_dfsdm_process_data()
925 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_dma_buffer_done()  local
926 	int available = stm32_dfsdm_adc_dma_residue(adc);  in stm32_dfsdm_dma_buffer_done()
939 		adc->bufi, available);  in stm32_dfsdm_dma_buffer_done()
940 	old_pos = adc->bufi;  in stm32_dfsdm_dma_buffer_done()
943 		s32 *buffer = (s32 *)&adc->rx_buf[adc->bufi];  in stm32_dfsdm_dma_buffer_done()
945 		stm32_dfsdm_process_data(adc, buffer);  in stm32_dfsdm_dma_buffer_done()
948 		adc->bufi += indio_dev->scan_bytes;  in stm32_dfsdm_dma_buffer_done()
949 		if (adc->bufi >= adc->buf_sz) {  in stm32_dfsdm_dma_buffer_done()
950 			if (adc->cb)  in stm32_dfsdm_dma_buffer_done()
951 				adc->cb(&adc->rx_buf[old_pos],  in stm32_dfsdm_dma_buffer_done()
952 					 adc->buf_sz - old_pos, adc->cb_priv);  in stm32_dfsdm_dma_buffer_done()
953 			adc->bufi = 0;  in stm32_dfsdm_dma_buffer_done()
965 		if (adc->dev_data->type == DFSDM_IIO)  in stm32_dfsdm_dma_buffer_done()
968 	if (adc->cb)  in stm32_dfsdm_dma_buffer_done()
969 		adc->cb(&adc->rx_buf[old_pos], adc->bufi - old_pos,  in stm32_dfsdm_dma_buffer_done()
970 			adc->cb_priv);  in stm32_dfsdm_dma_buffer_done()
975 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_dma_start()  local
982 		.src_addr = (dma_addr_t)adc->dfsdm->phys_base,  in stm32_dfsdm_adc_dma_start()
989 	if (!adc->dma_chan)  in stm32_dfsdm_adc_dma_start()
993 		adc->buf_sz, adc->buf_sz / 2);  in stm32_dfsdm_adc_dma_start()
995 	if (adc->nconv == 1 && !indio_dev->trig)  in stm32_dfsdm_adc_dma_start()
996 		config.src_addr += DFSDM_RDATAR(adc->fl_id);  in stm32_dfsdm_adc_dma_start()
998 		config.src_addr += DFSDM_JDATAR(adc->fl_id);  in stm32_dfsdm_adc_dma_start()
999 	ret = dmaengine_slave_config(adc->dma_chan, &config);  in stm32_dfsdm_adc_dma_start()
1004 	desc = dmaengine_prep_dma_cyclic(adc->dma_chan,  in stm32_dfsdm_adc_dma_start()
1005 					 adc->dma_buf,  in stm32_dfsdm_adc_dma_start()
1006 					 adc->buf_sz, adc->buf_sz / 2,  in stm32_dfsdm_adc_dma_start()
1021 	dma_async_issue_pending(adc->dma_chan);  in stm32_dfsdm_adc_dma_start()
1023 	if (adc->nconv == 1 && !indio_dev->trig) {  in stm32_dfsdm_adc_dma_start()
1025 		ret = regmap_set_bits(adc->dfsdm->regmap,  in stm32_dfsdm_adc_dma_start()
1026 				      DFSDM_CR1(adc->fl_id),  in stm32_dfsdm_adc_dma_start()
1030 		ret = regmap_set_bits(adc->dfsdm->regmap,  in stm32_dfsdm_adc_dma_start()
1031 				      DFSDM_CR1(adc->fl_id),  in stm32_dfsdm_adc_dma_start()
1041 	dmaengine_terminate_all(adc->dma_chan);  in stm32_dfsdm_adc_dma_start()
1048 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_dma_stop()  local
1050 	if (!adc->dma_chan)  in stm32_dfsdm_adc_dma_stop()
1053 	regmap_clear_bits(adc->dfsdm->regmap, DFSDM_CR1(adc->fl_id),  in stm32_dfsdm_adc_dma_stop()
1055 	dmaengine_terminate_all(adc->dma_chan);  in stm32_dfsdm_adc_dma_stop()
1061 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_update_scan_mode()  local
1063 	adc->nconv = bitmap_weight(scan_mask, iio_get_masklength(indio_dev));  in stm32_dfsdm_update_scan_mode()
1064 	adc->smask = *scan_mask;  in stm32_dfsdm_update_scan_mode()
1066 	dev_dbg(&indio_dev->dev, "nconv=%d mask=%lx\n", adc->nconv, *scan_mask);  in stm32_dfsdm_update_scan_mode()
1073 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_postenable()  local
1077 	/* Reset adc buffer index */  in stm32_dfsdm_postenable()
1078 	adc->bufi = 0;  in stm32_dfsdm_postenable()
1080 	if (adc->hwc) {  in stm32_dfsdm_postenable()
1081 		ret = iio_hw_consumer_enable(adc->hwc);  in stm32_dfsdm_postenable()
1086 	if (adc->backend) {  in stm32_dfsdm_postenable()
1087 		while (adc->backend[i]) {  in stm32_dfsdm_postenable()
1088 			ret = iio_backend_enable(adc->backend[i]);  in stm32_dfsdm_postenable()
1095 	ret = stm32_dfsdm_start_dfsdm(adc->dfsdm);  in stm32_dfsdm_postenable()
1116 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_postenable()
1118 	if (adc->hwc)  in stm32_dfsdm_postenable()
1119 		iio_hw_consumer_disable(adc->hwc);  in stm32_dfsdm_postenable()
1126 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_predisable()  local
1133 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_predisable()
1135 	if (adc->backend) {  in stm32_dfsdm_predisable()
1136 		while (adc->backend[i]) {  in stm32_dfsdm_predisable()
1137 			iio_backend_disable(adc->backend[i]);  in stm32_dfsdm_predisable()
1142 	if (adc->hwc)  in stm32_dfsdm_predisable()
1143 		iio_hw_consumer_disable(adc->hwc);  in stm32_dfsdm_predisable()
1169 	struct stm32_dfsdm_adc *adc;  in stm32_dfsdm_get_buff_cb()  local
1173 	adc = iio_priv(iio_dev);  in stm32_dfsdm_get_buff_cb()
1175 	adc->cb = cb;  in stm32_dfsdm_get_buff_cb()
1176 	adc->cb_priv = private;  in stm32_dfsdm_get_buff_cb()
1189 	struct stm32_dfsdm_adc *adc;  in stm32_dfsdm_release_buff_cb()  local
1193 	adc = iio_priv(iio_dev);  in stm32_dfsdm_release_buff_cb()
1195 	adc->cb = NULL;  in stm32_dfsdm_release_buff_cb()
1196 	adc->cb_priv = NULL;  in stm32_dfsdm_release_buff_cb()
1205 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_single_conv()  local
1209 	reinit_completion(&adc->completion);  in stm32_dfsdm_single_conv()
1211 	adc->buffer = res;  in stm32_dfsdm_single_conv()
1213 	ret = stm32_dfsdm_start_dfsdm(adc->dfsdm);  in stm32_dfsdm_single_conv()
1217 	ret = regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
1222 	adc->nconv = 1;  in stm32_dfsdm_single_conv()
1223 	adc->smask = BIT(chan->scan_index);  in stm32_dfsdm_single_conv()
1226 		regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
1231 	time_left = wait_for_completion_interruptible_timeout(&adc->completion,  in stm32_dfsdm_single_conv()
1235 	regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
1247 	stm32_dfsdm_process_data(adc, res);  in stm32_dfsdm_single_conv()
1250 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_single_conv()
1259 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_write_raw()  local
1260 	struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel];  in stm32_dfsdm_write_raw()
1266 		spi_freq = adc->dfsdm->spi_master_freq;  in stm32_dfsdm_write_raw()
1270 		spi_freq = adc->dfsdm->spi_master_freq / 2;  in stm32_dfsdm_write_raw()
1273 		spi_freq = adc->spi_freq;  in stm32_dfsdm_write_raw()
1286 				adc->sample_freq, spi_freq / val);  in stm32_dfsdm_write_raw()
1287 			adc->oversamp = val;  in stm32_dfsdm_write_raw()
1288 			adc->sample_freq = spi_freq / val;  in stm32_dfsdm_write_raw()
1313 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_read_raw()  local
1315 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];  in stm32_dfsdm_read_raw()
1329 		if (adc->hwc)  in stm32_dfsdm_read_raw()
1330 			ret = iio_hw_consumer_enable(adc->hwc);  in stm32_dfsdm_read_raw()
1331 		if (adc->backend)  in stm32_dfsdm_read_raw()
1332 			ret = iio_backend_enable(adc->backend[idx]);  in stm32_dfsdm_read_raw()
1341 		if (adc->hwc)  in stm32_dfsdm_read_raw()
1342 			iio_hw_consumer_disable(adc->hwc);  in stm32_dfsdm_read_raw()
1343 		if (adc->backend)  in stm32_dfsdm_read_raw()
1344 			iio_backend_disable(adc->backend[idx]);  in stm32_dfsdm_read_raw()
1356 		*val = adc->oversamp;  in stm32_dfsdm_read_raw()
1361 		*val = adc->sample_freq;  in stm32_dfsdm_read_raw()
1374 		if (adc->backend) {  in stm32_dfsdm_read_raw()
1375 			ret = iio_backend_read_scale(adc->backend[idx], chan, val, NULL);  in stm32_dfsdm_read_raw()
1398 		if (adc->backend) {  in stm32_dfsdm_read_raw()
1399 			ret = iio_backend_read_offset(adc->backend[idx], chan, val, NULL);  in stm32_dfsdm_read_raw()
1437 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_irq()  local
1438 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_irq()
1441 	regmap_read(regmap, DFSDM_ISR(adc->fl_id), &status);  in stm32_dfsdm_irq()
1442 	regmap_read(regmap, DFSDM_CR2(adc->fl_id), &int_en);  in stm32_dfsdm_irq()
1446 		regmap_read(regmap, DFSDM_RDATAR(adc->fl_id), adc->buffer);  in stm32_dfsdm_irq()
1447 		complete(&adc->completion);  in stm32_dfsdm_irq()
1453 		regmap_set_bits(regmap, DFSDM_ICR(adc->fl_id),  in stm32_dfsdm_irq()
1477 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_dma_release()  local
1479 	if (adc->dma_chan) {  in stm32_dfsdm_dma_release()
1480 		dma_free_coherent(adc->dma_chan->device->dev,  in stm32_dfsdm_dma_release()
1482 				  adc->rx_buf, adc->dma_buf);  in stm32_dfsdm_dma_release()
1483 		dma_release_channel(adc->dma_chan);  in stm32_dfsdm_dma_release()
1490 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_dma_request()  local
1492 	adc->dma_chan = dma_request_chan(dev, "rx");  in stm32_dfsdm_dma_request()
1493 	if (IS_ERR(adc->dma_chan)) {  in stm32_dfsdm_dma_request()
1494 		int ret = PTR_ERR(adc->dma_chan);  in stm32_dfsdm_dma_request()
1496 		adc->dma_chan = NULL;  in stm32_dfsdm_dma_request()
1500 	adc->rx_buf = dma_alloc_coherent(adc->dma_chan->device->dev,  in stm32_dfsdm_dma_request()
1502 					 &adc->dma_buf, GFP_KERNEL);  in stm32_dfsdm_dma_request()
1503 	if (!adc->rx_buf) {  in stm32_dfsdm_dma_request()
1504 		dma_release_channel(adc->dma_chan);  in stm32_dfsdm_dma_request()
1517 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_chan_init_one()  local
1521 		ret = stm32_dfsdm_generic_channel_parse_of(adc->dfsdm, indio_dev, ch, child);  in stm32_dfsdm_adc_chan_init_one()
1523 		ret = stm32_dfsdm_channel_parse_of(adc->dfsdm, indio_dev, ch);  in stm32_dfsdm_adc_chan_init_one()
1546 	if (adc->dev_data->type == DFSDM_AUDIO) {  in stm32_dfsdm_adc_chan_init_one()
1556 	return stm32_dfsdm_chan_configure(adc->dfsdm,  in stm32_dfsdm_adc_chan_init_one()
1557 					  &adc->dfsdm->ch_list[ch->channel]);  in stm32_dfsdm_adc_chan_init_one()
1599 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_audio_init()  local
1604 	/* If st,adc-channels is defined legacy binding is used. Else assume generic binding. */  in stm32_dfsdm_audio_init()
1605 	num_ch = of_property_count_u32_elems(indio_dev->dev.of_node, "st,adc-channels");  in stm32_dfsdm_audio_init()
1627 	d_ch = &adc->dfsdm->ch_list[ch->channel];  in stm32_dfsdm_audio_init()
1629 		adc->spi_freq = adc->dfsdm->spi_master_freq;  in stm32_dfsdm_audio_init()
1637 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_init()  local
1641 	adc->oversamp = DFSDM_DEFAULT_OVERSAMPLING;  in stm32_dfsdm_adc_init()
1642 	ret = stm32_dfsdm_compute_all_osrs(indio_dev, adc->oversamp);  in stm32_dfsdm_adc_init()
1649 		num_ch = of_property_count_u32_elems(indio_dev->dev.of_node, "st,adc-channels");  in stm32_dfsdm_adc_init()
1651 			dev_err(&indio_dev->dev, "Bad st,adc-channels\n");  in stm32_dfsdm_adc_init()
1658 	if (num_ch > adc->dfsdm->num_chs) {  in stm32_dfsdm_adc_init()
1660 			num_ch, adc->dfsdm->num_chs);  in stm32_dfsdm_adc_init()
1667 		adc->hwc = devm_iio_hw_consumer_alloc(&indio_dev->dev);  in stm32_dfsdm_adc_init()
1668 		if (IS_ERR(adc->hwc))  in stm32_dfsdm_adc_init()
1673 		adc->hwc = NULL;  in stm32_dfsdm_adc_init()
1675 		adc->backend = devm_kcalloc(&indio_dev->dev, num_ch, sizeof(*adc->backend),  in stm32_dfsdm_adc_init()
1677 		if (!adc->backend)  in stm32_dfsdm_adc_init()
1693 	init_completion(&adc->completion);  in stm32_dfsdm_adc_init()
1733 		.compatible = "st,stm32-dfsdm-adc",
1747 	struct stm32_dfsdm_adc *adc;  in stm32_dfsdm_adc_probe()  local
1755 	iio = devm_iio_device_alloc(dev, sizeof(*adc));  in stm32_dfsdm_adc_probe()
1761 	adc = iio_priv(iio);  in stm32_dfsdm_adc_probe()
1762 	adc->dfsdm = dev_get_drvdata(dev->parent);  in stm32_dfsdm_adc_probe()
1769 	ret = of_property_read_u32(dev->of_node, "reg", &adc->fl_id);  in stm32_dfsdm_adc_probe()
1770 	if (ret != 0 || adc->fl_id >= adc->dfsdm->num_fls) {  in stm32_dfsdm_adc_probe()
1780 		snprintf(name, sizeof("dfsdm-pdm0"), "dfsdm-pdm%d", adc->fl_id);  in stm32_dfsdm_adc_probe()
1783 		snprintf(name, sizeof("dfsdm-adc0"), "dfsdm-adc%d", adc->fl_id);  in stm32_dfsdm_adc_probe()
1808 	adc->dfsdm->fl_list[adc->fl_id].ford = val;  in stm32_dfsdm_adc_probe()
1812 		adc->dfsdm->fl_list[adc->fl_id].sync_mode = val;  in stm32_dfsdm_adc_probe()
1814 	adc->dev_data = dev_data;  in stm32_dfsdm_adc_probe()
1844 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_remove()  local
1846 	if (adc->dev_data->type == DFSDM_AUDIO)  in stm32_dfsdm_adc_remove()
1865 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_resume()  local
1873 		ch = &adc->dfsdm->ch_list[chan->channel];  in stm32_dfsdm_adc_resume()
1874 		ret = stm32_dfsdm_chan_configure(adc->dfsdm, ch);  in stm32_dfsdm_adc_resume()
1891 		.name = "stm32-dfsdm-adc",
1900 MODULE_DESCRIPTION("STM32 sigma delta ADC");