3  * This file is the ADC part of the STM32 DFSDM driver
11 #include <linux/iio/adc/stm32-dfsdm-adc.h>
29 #include "stm32-dfsdm.h"
73 	struct stm32_dfsdm *dfsdm;  member
105 /* DFSDM channel serial interface type */
114 /* DFSDM channel clock source */
140  * struct stm32_dfsdm_trig_info - DFSDM trigger info
319 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];  in stm32_dfsdm_compute_all_osrs()
340 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_start_channel()
360 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_stop_channel()
372 static int stm32_dfsdm_chan_configure(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_chan_configure()  argument
376 	struct regmap *regmap = dfsdm->regmap;  in stm32_dfsdm_chan_configure()
398 	struct stm32_dfsdm *dfsdm = adc->dfsdm;  in stm32_dfsdm_start_filter()  local
402 	ret = regmap_update_bits(dfsdm->regmap, DFSDM_CR1(fl_id),  in stm32_dfsdm_start_filter()
412 	return regmap_update_bits(dfsdm->regmap, DFSDM_CR1(fl_id),  in stm32_dfsdm_start_filter()
417 static void stm32_dfsdm_stop_filter(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_stop_filter()  argument
421 	regmap_update_bits(dfsdm->regmap, DFSDM_CR1(fl_id),  in stm32_dfsdm_stop_filter()
430 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_filter_set_trig()
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()
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()
541 	 * DFSDM modes configuration W.R.T audio/iio type modes  in stm32_dfsdm_filter_configure()
600 static int stm32_dfsdm_channel_parse_of(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_channel_parse_of()  argument
618 	if (ch->channel >= dfsdm->num_chs) {  in stm32_dfsdm_channel_parse_of()
621 			ch->channel, dfsdm->num_chs);  in stm32_dfsdm_channel_parse_of()
635 	df_ch =  &dfsdm->ch_list[ch->channel];  in stm32_dfsdm_channel_parse_of()
671 static int stm32_dfsdm_generic_channel_parse_of(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_generic_channel_parse_of()  argument
688 	if (ch->channel >= dfsdm->num_chs) {  in stm32_dfsdm_generic_channel_parse_of()
690 			ch->channel, dfsdm->num_chs);  in stm32_dfsdm_generic_channel_parse_of()
701 	df_ch =  &dfsdm->ch_list[ch->channel];  in stm32_dfsdm_generic_channel_parse_of()
779 	struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel];  in dfsdm_adc_audio_set_spiclk()
785 	/* If DFSDM is master on SPI, SPI freq can not be updated */  in dfsdm_adc_audio_set_spiclk()
810 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_start_conv()
842 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_stop_conv()
844 	stm32_dfsdm_stop_filter(adc->dfsdm, adc->fl_id);  in stm32_dfsdm_stop_conv()
898 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];  in stm32_dfsdm_process_data()
974 	 * The DFSDM supports half-word transfers. However, for 16 bits record,  in stm32_dfsdm_adc_dma_start()
979 		.src_addr = (dma_addr_t)adc->dfsdm->phys_base,  in stm32_dfsdm_adc_dma_start()
1022 		ret = regmap_set_bits(adc->dfsdm->regmap,  in stm32_dfsdm_adc_dma_start()
1027 		ret = regmap_set_bits(adc->dfsdm->regmap,  in stm32_dfsdm_adc_dma_start()
1050 	regmap_clear_bits(adc->dfsdm->regmap, DFSDM_CR1(adc->fl_id),  in stm32_dfsdm_adc_dma_stop()
1092 	ret = stm32_dfsdm_start_dfsdm(adc->dfsdm);  in stm32_dfsdm_postenable()
1113 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_postenable()
1130 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_predisable()
1210 	ret = stm32_dfsdm_start_dfsdm(adc->dfsdm);  in stm32_dfsdm_single_conv()
1214 	ret = regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
1223 		regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
1232 	regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
1247 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_single_conv()
1257 	struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel];  in stm32_dfsdm_write_raw()
1263 		spi_freq = adc->dfsdm->spi_master_freq;  in stm32_dfsdm_write_raw()
1267 		spi_freq = adc->dfsdm->spi_master_freq / 2;  in stm32_dfsdm_write_raw()
1312 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];  in stm32_dfsdm_read_raw()
1385 		 * DFSDM output data are in the range [-2^n, 2^n],  in stm32_dfsdm_read_raw()
1435 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_irq()
1518 		ret = stm32_dfsdm_generic_channel_parse_of(adc->dfsdm, indio_dev, ch, child);  in stm32_dfsdm_adc_chan_init_one()
1520 		ret = stm32_dfsdm_channel_parse_of(adc->dfsdm, indio_dev, ch);  in stm32_dfsdm_adc_chan_init_one()
1553 	return stm32_dfsdm_chan_configure(adc->dfsdm,  in stm32_dfsdm_adc_chan_init_one()
1554 					  &adc->dfsdm->ch_list[ch->channel]);  in stm32_dfsdm_adc_chan_init_one()
1578 		/* Skip DAI node in DFSDM audio nodes */  in stm32_dfsdm_generic_chan_init()
1624 	d_ch = &adc->dfsdm->ch_list[ch->channel];  in stm32_dfsdm_audio_init()
1626 		adc->spi_freq = adc->dfsdm->spi_master_freq;  in stm32_dfsdm_audio_init()
1655 	if (num_ch > adc->dfsdm->num_chs) {  in stm32_dfsdm_adc_init()
1657 			num_ch, adc->dfsdm->num_chs);  in stm32_dfsdm_adc_init()
1730 		.compatible = "st,stm32-dfsdm-adc",
1734 		.compatible = "st,stm32-dfsdm-dmic",
1759 	adc->dfsdm = dev_get_drvdata(dev->parent);  in stm32_dfsdm_adc_probe()
1767 	if (ret != 0 || adc->fl_id >= adc->dfsdm->num_fls) {  in stm32_dfsdm_adc_probe()
1772 	name = devm_kzalloc(dev, sizeof("dfsdm-adc0"), GFP_KERNEL);  in stm32_dfsdm_adc_probe()
1777 		snprintf(name, sizeof("dfsdm-pdm0"), "dfsdm-pdm%d", adc->fl_id);  in stm32_dfsdm_adc_probe()
1780 		snprintf(name, sizeof("dfsdm-adc0"), "dfsdm-adc%d", adc->fl_id);  in stm32_dfsdm_adc_probe()
1805 	adc->dfsdm->fl_list[adc->fl_id].ford = val;  in stm32_dfsdm_adc_probe()
1809 		adc->dfsdm->fl_list[adc->fl_id].sync_mode = val;  in stm32_dfsdm_adc_probe()
1870 		ch = &adc->dfsdm->ch_list[chan->channel];  in stm32_dfsdm_adc_resume()
1871 		ret = stm32_dfsdm_chan_configure(adc->dfsdm, ch);  in stm32_dfsdm_adc_resume()
1888 		.name = "stm32-dfsdm-adc",