65 	int (*init)(struct device *dev, struct iio_dev *indio_dev);
170 static int stm32_dfsdm_get_jextsel(struct iio_dev *indio_dev,  in stm32_dfsdm_get_jextsel()  argument
312 static int stm32_dfsdm_compute_all_osrs(struct iio_dev *indio_dev,  in stm32_dfsdm_compute_all_osrs()  argument
315 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_compute_all_osrs()
325 		dev_err(&indio_dev->dev,  in stm32_dfsdm_compute_all_osrs()
334 static int stm32_dfsdm_start_channel(struct iio_dev *indio_dev)  in stm32_dfsdm_start_channel()  argument
336 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_start_channel()
343 		chan = indio_dev->channels + bit;  in stm32_dfsdm_start_channel()
354 static void stm32_dfsdm_stop_channel(struct iio_dev *indio_dev)  in stm32_dfsdm_stop_channel()  argument
356 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_stop_channel()
362 		chan = indio_dev->channels + bit;  in stm32_dfsdm_stop_channel()
422 static int stm32_dfsdm_filter_set_trig(struct iio_dev *indio_dev,  in stm32_dfsdm_filter_set_trig()  argument
426 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_filter_set_trig()
432 		ret = stm32_dfsdm_get_jextsel(indio_dev, trig);  in stm32_dfsdm_filter_set_trig()
451 static int stm32_dfsdm_channels_configure(struct iio_dev *indio_dev,  in stm32_dfsdm_channels_configure()  argument
455 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_channels_configure()
469 	if (adc->nconv == 1 && !trig && iio_buffer_enabled(indio_dev)) {  in stm32_dfsdm_channels_configure()
479 	dev_dbg(&indio_dev->dev, "Samples actual resolution: %d bits",  in stm32_dfsdm_channels_configure()
484 		chan = indio_dev->channels + bit;  in stm32_dfsdm_channels_configure()
497 static int stm32_dfsdm_filter_configure(struct iio_dev *indio_dev,  in stm32_dfsdm_filter_configure()  argument
501 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_filter_configure()
527 	ret = stm32_dfsdm_filter_set_trig(indio_dev, fl_id, trig);  in stm32_dfsdm_filter_configure()
558 		chan = indio_dev->channels + bit;  in stm32_dfsdm_filter_configure()
564 		if (iio_buffer_enabled(indio_dev))  in stm32_dfsdm_filter_configure()
572 			chan = indio_dev->channels + bit;  in stm32_dfsdm_filter_configure()
598 					struct iio_dev *indio_dev,  in stm32_dfsdm_channel_parse_of()  argument
606 	ret = of_property_read_u32_index(indio_dev->dev.of_node,  in stm32_dfsdm_channel_parse_of()
610 		dev_err(&indio_dev->dev,  in stm32_dfsdm_channel_parse_of()
616 		dev_err(&indio_dev->dev,  in stm32_dfsdm_channel_parse_of()
622 	ret = of_property_read_string_index(indio_dev->dev.of_node,  in stm32_dfsdm_channel_parse_of()
626 		dev_err(&indio_dev->dev,  in stm32_dfsdm_channel_parse_of()
635 	ret = of_property_read_string_index(indio_dev->dev.of_node,  in stm32_dfsdm_channel_parse_of()
647 	ret = of_property_read_string_index(indio_dev->dev.of_node,  in stm32_dfsdm_channel_parse_of()
659 	ret = of_property_read_u32_index(indio_dev->dev.of_node,  in stm32_dfsdm_channel_parse_of()
668 static ssize_t dfsdm_adc_audio_get_spiclk(struct iio_dev *indio_dev,  in dfsdm_adc_audio_get_spiclk()  argument
673 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in dfsdm_adc_audio_get_spiclk()
678 static int dfsdm_adc_set_samp_freq(struct iio_dev *indio_dev,  in dfsdm_adc_set_samp_freq()  argument
682 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in dfsdm_adc_set_samp_freq()
688 		dev_dbg(&indio_dev->dev,  in dfsdm_adc_set_samp_freq()
692 	ret = stm32_dfsdm_compute_all_osrs(indio_dev, oversamp);  in dfsdm_adc_set_samp_freq()
702 static ssize_t dfsdm_adc_audio_set_spiclk(struct iio_dev *indio_dev,  in dfsdm_adc_audio_set_spiclk()  argument
707 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in dfsdm_adc_audio_set_spiclk()
713 	dev_err(&indio_dev->dev, "enter %s\n", __func__);  in dfsdm_adc_audio_set_spiclk()
726 		ret = dfsdm_adc_set_samp_freq(indio_dev, sample_freq, spi_freq);  in dfsdm_adc_audio_set_spiclk()
735 static int stm32_dfsdm_start_conv(struct iio_dev *indio_dev,  in stm32_dfsdm_start_conv()  argument
738 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_start_conv()
742 	ret = stm32_dfsdm_channels_configure(indio_dev, adc->fl_id, trig);  in stm32_dfsdm_start_conv()
746 	ret = stm32_dfsdm_start_channel(indio_dev);  in stm32_dfsdm_start_conv()
750 	ret = stm32_dfsdm_filter_configure(indio_dev, adc->fl_id, trig);  in stm32_dfsdm_start_conv()
764 	stm32_dfsdm_stop_channel(indio_dev);  in stm32_dfsdm_start_conv()
769 static void stm32_dfsdm_stop_conv(struct iio_dev *indio_dev)  in stm32_dfsdm_stop_conv()  argument
771 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_stop_conv()
779 	stm32_dfsdm_stop_channel(indio_dev);  in stm32_dfsdm_stop_conv()
782 static int stm32_dfsdm_set_watermark(struct iio_dev *indio_dev,  in stm32_dfsdm_set_watermark()  argument
785 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_set_watermark()
852 	struct iio_dev *indio_dev = data;  in stm32_dfsdm_dma_buffer_done()  local
853 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_dma_buffer_done()
866 	dev_dbg(&indio_dev->dev, "pos = %d, available = %d\n",  in stm32_dfsdm_dma_buffer_done()
870 	while (available >= indio_dev->scan_bytes) {  in stm32_dfsdm_dma_buffer_done()
875 		available -= indio_dev->scan_bytes;  in stm32_dfsdm_dma_buffer_done()
876 		adc->bufi += indio_dev->scan_bytes;  in stm32_dfsdm_dma_buffer_done()
894 			iio_push_to_buffers(indio_dev, buffer);  in stm32_dfsdm_dma_buffer_done()
901 static int stm32_dfsdm_adc_dma_start(struct iio_dev *indio_dev)  in stm32_dfsdm_adc_dma_start()  argument
903 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_dma_start()
920 	dev_dbg(&indio_dev->dev, "size=%d watermark=%d\n",  in stm32_dfsdm_adc_dma_start()
923 	if (adc->nconv == 1 && !indio_dev->trig)  in stm32_dfsdm_adc_dma_start()
941 	desc->callback_param = indio_dev;  in stm32_dfsdm_adc_dma_start()
951 	if (adc->nconv == 1 && !indio_dev->trig) {  in stm32_dfsdm_adc_dma_start()
976 static void stm32_dfsdm_adc_dma_stop(struct iio_dev *indio_dev)  in stm32_dfsdm_adc_dma_stop()  argument
978 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_dma_stop()
988 static int stm32_dfsdm_update_scan_mode(struct iio_dev *indio_dev,  in stm32_dfsdm_update_scan_mode()  argument
991 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_update_scan_mode()
993 	adc->nconv = bitmap_weight(scan_mask, indio_dev->masklength);  in stm32_dfsdm_update_scan_mode()
996 	dev_dbg(&indio_dev->dev, "nconv=%d mask=%lx\n", adc->nconv, *scan_mask);  in stm32_dfsdm_update_scan_mode()
1001 static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)  in stm32_dfsdm_postenable()  argument
1003 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_postenable()
1019 	ret = stm32_dfsdm_adc_dma_start(indio_dev);  in stm32_dfsdm_postenable()
1021 		dev_err(&indio_dev->dev, "Can't start DMA\n");  in stm32_dfsdm_postenable()
1025 	ret = stm32_dfsdm_start_conv(indio_dev, indio_dev->trig);  in stm32_dfsdm_postenable()
1027 		dev_err(&indio_dev->dev, "Can't start conversion\n");  in stm32_dfsdm_postenable()
1034 	stm32_dfsdm_adc_dma_stop(indio_dev);  in stm32_dfsdm_postenable()
1044 static int stm32_dfsdm_predisable(struct iio_dev *indio_dev)  in stm32_dfsdm_predisable()  argument
1046 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_predisable()
1048 	stm32_dfsdm_stop_conv(indio_dev);  in stm32_dfsdm_predisable()
1050 	stm32_dfsdm_adc_dma_stop(indio_dev);  in stm32_dfsdm_predisable()
1114 static int stm32_dfsdm_single_conv(struct iio_dev *indio_dev,  in stm32_dfsdm_single_conv()  argument
1117 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_single_conv()
1136 	ret = stm32_dfsdm_start_conv(indio_dev, NULL);  in stm32_dfsdm_single_conv()
1157 	stm32_dfsdm_stop_conv(indio_dev);  in stm32_dfsdm_single_conv()
1167 static int stm32_dfsdm_write_raw(struct iio_dev *indio_dev,  in stm32_dfsdm_write_raw()  argument
1171 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_write_raw()
1190 		ret = iio_device_claim_direct_mode(indio_dev);  in stm32_dfsdm_write_raw()
1194 		ret = stm32_dfsdm_compute_all_osrs(indio_dev, val);  in stm32_dfsdm_write_raw()
1196 			dev_dbg(&indio_dev->dev,  in stm32_dfsdm_write_raw()
1202 		iio_device_release_direct_mode(indio_dev);  in stm32_dfsdm_write_raw()
1209 		ret = iio_device_claim_direct_mode(indio_dev);  in stm32_dfsdm_write_raw()
1213 		ret = dfsdm_adc_set_samp_freq(indio_dev, val, spi_freq);  in stm32_dfsdm_write_raw()
1214 		iio_device_release_direct_mode(indio_dev);  in stm32_dfsdm_write_raw()
1221 static int stm32_dfsdm_read_raw(struct iio_dev *indio_dev,  in stm32_dfsdm_read_raw()  argument
1225 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_read_raw()
1230 		ret = iio_device_claim_direct_mode(indio_dev);  in stm32_dfsdm_read_raw()
1235 			dev_err(&indio_dev->dev,  in stm32_dfsdm_read_raw()
1238 			iio_device_release_direct_mode(indio_dev);  in stm32_dfsdm_read_raw()
1241 		ret = stm32_dfsdm_single_conv(indio_dev, chan, val);  in stm32_dfsdm_read_raw()
1244 			dev_err(&indio_dev->dev,  in stm32_dfsdm_read_raw()
1247 			iio_device_release_direct_mode(indio_dev);  in stm32_dfsdm_read_raw()
1250 		iio_device_release_direct_mode(indio_dev);  in stm32_dfsdm_read_raw()
1267 static int stm32_dfsdm_validate_trigger(struct iio_dev *indio_dev,  in stm32_dfsdm_validate_trigger()  argument
1270 	return stm32_dfsdm_get_jextsel(indio_dev, trig) < 0 ? -EINVAL : 0;  in stm32_dfsdm_validate_trigger()
1290 	struct iio_dev *indio_dev = arg;  in stm32_dfsdm_irq()  local
1291 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_irq()
1306 			dev_warn(&indio_dev->dev, "Overrun detected\n");  in stm32_dfsdm_irq()
1330 static void stm32_dfsdm_dma_release(struct iio_dev *indio_dev)  in stm32_dfsdm_dma_release()  argument
1332 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_dma_release()
1343 				   struct iio_dev *indio_dev)  in stm32_dfsdm_dma_request()  argument
1345 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_dma_request()
1363 	indio_dev->modes |= INDIO_BUFFER_SOFTWARE;  in stm32_dfsdm_dma_request()
1364 	indio_dev->setup_ops = &stm32_dfsdm_buffer_setup_ops;  in stm32_dfsdm_dma_request()
1369 static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev,  in stm32_dfsdm_adc_chan_init_one()  argument
1372 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_chan_init_one()
1375 	ret = stm32_dfsdm_channel_parse_of(adc->dfsdm, indio_dev, ch);  in stm32_dfsdm_adc_chan_init_one()
1403 static int stm32_dfsdm_audio_init(struct device *dev, struct iio_dev *indio_dev)  in stm32_dfsdm_audio_init()  argument
1406 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_audio_init()
1410 	ch = devm_kzalloc(&indio_dev->dev, sizeof(*ch), GFP_KERNEL);  in stm32_dfsdm_audio_init()
1416 	ret = stm32_dfsdm_adc_chan_init_one(indio_dev, ch);  in stm32_dfsdm_audio_init()
1418 		dev_err(&indio_dev->dev, "Channels init failed\n");  in stm32_dfsdm_audio_init()
1427 	indio_dev->num_channels = 1;  in stm32_dfsdm_audio_init()
1428 	indio_dev->channels = ch;  in stm32_dfsdm_audio_init()
1430 	return stm32_dfsdm_dma_request(dev, indio_dev);  in stm32_dfsdm_audio_init()
1433 static int stm32_dfsdm_adc_init(struct device *dev, struct iio_dev *indio_dev)  in stm32_dfsdm_adc_init()  argument
1436 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_init()
1441 	ret = stm32_dfsdm_compute_all_osrs(indio_dev, adc->oversamp);  in stm32_dfsdm_adc_init()
1445 	num_ch = of_property_count_u32_elems(indio_dev->dev.of_node,  in stm32_dfsdm_adc_init()
1448 		dev_err(&indio_dev->dev, "Bad st,adc-channels\n");  in stm32_dfsdm_adc_init()
1453 	adc->hwc = devm_iio_hw_consumer_alloc(&indio_dev->dev);  in stm32_dfsdm_adc_init()
1457 	ch = devm_kcalloc(&indio_dev->dev, num_ch, sizeof(*ch),  in stm32_dfsdm_adc_init()
1464 		ret = stm32_dfsdm_adc_chan_init_one(indio_dev, &ch[chan_idx]);  in stm32_dfsdm_adc_init()
1466 			dev_err(&indio_dev->dev, "Channels init failed\n");  in stm32_dfsdm_adc_init()
1471 	indio_dev->num_channels = num_ch;  in stm32_dfsdm_adc_init()
1472 	indio_dev->channels = ch;  in stm32_dfsdm_adc_init()
1477 	ret = stm32_dfsdm_dma_request(dev, indio_dev);  in stm32_dfsdm_adc_init()
1487 	ret = iio_triggered_buffer_setup(indio_dev,  in stm32_dfsdm_adc_init()
1491 		stm32_dfsdm_dma_release(indio_dev);  in stm32_dfsdm_adc_init()
1492 		dev_err(&indio_dev->dev, "buffer setup failed\n");  in stm32_dfsdm_adc_init()
1497 	indio_dev->modes |= INDIO_HARDWARE_TRIGGERED;  in stm32_dfsdm_adc_init()
1623 	struct iio_dev *indio_dev = platform_get_drvdata(pdev);  in stm32_dfsdm_adc_remove()  local
1624 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_remove()
1628 	iio_device_unregister(indio_dev);  in stm32_dfsdm_adc_remove()
1629 	stm32_dfsdm_dma_release(indio_dev);  in stm32_dfsdm_adc_remove()
1636 	struct iio_dev *indio_dev = dev_get_drvdata(dev);  in stm32_dfsdm_adc_suspend()  local
1638 	if (iio_buffer_enabled(indio_dev))  in stm32_dfsdm_adc_suspend()
1639 		stm32_dfsdm_predisable(indio_dev);  in stm32_dfsdm_adc_suspend()
1646 	struct iio_dev *indio_dev = dev_get_drvdata(dev);  in stm32_dfsdm_adc_resume()  local
1647 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);  in stm32_dfsdm_adc_resume()
1653 	for (i = 0; i < indio_dev->num_channels; i++) {  in stm32_dfsdm_adc_resume()
1654 		chan = indio_dev->channels + i;  in stm32_dfsdm_adc_resume()
1661 	if (iio_buffer_enabled(indio_dev))  in stm32_dfsdm_adc_resume()
1662 		stm32_dfsdm_postenable(indio_dev);  in stm32_dfsdm_adc_resume()