3  * This file is the ADC part of the STM32 DFSDM driver
11 #include <linux/iio/adc/stm32-dfsdm-adc.h>
22 #include "stm32-dfsdm.h"
54 	struct stm32_dfsdm *dfsdm;  member
83 /* DFSDM channel serial interface type */
92 /* DFSDM channel clock source */
203 static int stm32_dfsdm_start_channel(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_start_channel()  argument
206 	return regmap_update_bits(dfsdm->regmap, DFSDM_CHCFGR1(ch_id),  in stm32_dfsdm_start_channel()
211 static void stm32_dfsdm_stop_channel(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_stop_channel()  argument
214 	regmap_update_bits(dfsdm->regmap, DFSDM_CHCFGR1(ch_id),  in stm32_dfsdm_stop_channel()
218 static int stm32_dfsdm_chan_configure(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_chan_configure()  argument
222 	struct regmap *regmap = dfsdm->regmap;  in stm32_dfsdm_chan_configure()
240 static int stm32_dfsdm_start_filter(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_start_filter()  argument
246 	ret = regmap_update_bits(dfsdm->regmap, DFSDM_CR1(fl_id),  in stm32_dfsdm_start_filter()
252 	return regmap_update_bits(dfsdm->regmap, DFSDM_CR1(fl_id),  in stm32_dfsdm_start_filter()
257 static void stm32_dfsdm_stop_filter(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_stop_filter()  argument
261 	regmap_update_bits(dfsdm->regmap, DFSDM_CR1(fl_id),  in stm32_dfsdm_stop_filter()
265 static int stm32_dfsdm_filter_configure(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_filter_configure()  argument
268 	struct regmap *regmap = dfsdm->regmap;  in stm32_dfsdm_filter_configure()
269 	struct stm32_dfsdm_filter *fl = &dfsdm->fl_list[fl_id];  in stm32_dfsdm_filter_configure()
300 static int stm32_dfsdm_channel_parse_of(struct stm32_dfsdm *dfsdm,  in stm32_dfsdm_channel_parse_of()  argument
318 	if (ch->channel >= dfsdm->num_chs) {  in stm32_dfsdm_channel_parse_of()
321 			ch->channel, dfsdm->num_chs);  in stm32_dfsdm_channel_parse_of()
335 	df_ch =  &dfsdm->ch_list[ch->channel];  in stm32_dfsdm_channel_parse_of()
387 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];  in dfsdm_adc_audio_set_spiclk()
388 	struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel];  in dfsdm_adc_audio_set_spiclk()
394 	/* If DFSDM is master on SPI, SPI freq can not be updated */  in dfsdm_adc_audio_set_spiclk()
427 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_start_conv()
431 	ret = stm32_dfsdm_start_channel(adc->dfsdm, chan->channel);  in stm32_dfsdm_start_conv()
435 	ret = stm32_dfsdm_filter_configure(adc->dfsdm, adc->fl_id,  in stm32_dfsdm_start_conv()
458 	ret = stm32_dfsdm_start_filter(adc->dfsdm, adc->fl_id);  in stm32_dfsdm_start_conv()
470 	stm32_dfsdm_stop_channel(adc->dfsdm, chan->channel);  in stm32_dfsdm_start_conv()
478 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_stop_conv()
480 	stm32_dfsdm_stop_filter(adc->dfsdm, adc->fl_id);  in stm32_dfsdm_stop_conv()
489 	stm32_dfsdm_stop_channel(adc->dfsdm, chan->channel);  in stm32_dfsdm_stop_conv()
622 	ret = stm32_dfsdm_start_dfsdm(adc->dfsdm);  in stm32_dfsdm_postenable()
645 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_postenable()
660 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_predisable()
730 	ret = stm32_dfsdm_start_dfsdm(adc->dfsdm);  in stm32_dfsdm_single_conv()
734 	ret = regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
741 		regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
750 	regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),  in stm32_dfsdm_single_conv()
763 	stm32_dfsdm_stop_dfsdm(adc->dfsdm);  in stm32_dfsdm_single_conv()
773 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];  in stm32_dfsdm_write_raw()
774 	struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel];  in stm32_dfsdm_write_raw()
792 			spi_freq = adc->dfsdm->spi_master_freq;  in stm32_dfsdm_write_raw()
796 			spi_freq = adc->dfsdm->spi_master_freq / 2;  in stm32_dfsdm_write_raw()
876 	struct regmap *regmap = adc->dfsdm->regmap;  in stm32_dfsdm_irq()
931 		.src_addr = (dma_addr_t)adc->dfsdm->phys_base +  in stm32_dfsdm_dma_request()
974 	ret = stm32_dfsdm_channel_parse_of(adc->dfsdm, indio_dev, ch);  in stm32_dfsdm_adc_chan_init_one()
997 	return stm32_dfsdm_chan_configure(adc->dfsdm,  in stm32_dfsdm_adc_chan_init_one()
998 					  &adc->dfsdm->ch_list[ch->channel]);  in stm32_dfsdm_adc_chan_init_one()
1024 	d_ch = &adc->dfsdm->ch_list[ch->channel];  in stm32_dfsdm_audio_init()
1026 		adc->spi_freq = adc->dfsdm->spi_master_freq;  in stm32_dfsdm_audio_init()
1042 	ret = stm32_dfsdm_set_osrs(&adc->dfsdm->fl_list[adc->fl_id], 0,  in stm32_dfsdm_adc_init()
1049 	if (num_ch < 0 || num_ch > adc->dfsdm->num_chs) {  in stm32_dfsdm_adc_init()
1093 		.compatible = "st,stm32-dfsdm-adc",
1097 		.compatible = "st,stm32-dfsdm-dmic",
1121 	adc->dfsdm = dev_get_drvdata(dev->parent);  in stm32_dfsdm_adc_probe()
1130 	if (ret != 0 || adc->fl_id >= adc->dfsdm->num_fls) {  in stm32_dfsdm_adc_probe()
1135 	name = devm_kzalloc(dev, sizeof("dfsdm-adc0"), GFP_KERNEL);  in stm32_dfsdm_adc_probe()
1140 		snprintf(name, sizeof("dfsdm-pdm0"), "dfsdm-pdm%d", adc->fl_id);  in stm32_dfsdm_adc_probe()
1143 		snprintf(name, sizeof("dfsdm-adc0"), "dfsdm-adc%d", adc->fl_id);  in stm32_dfsdm_adc_probe()
1171 	adc->dfsdm->fl_list[adc->fl_id].ford = val;  in stm32_dfsdm_adc_probe()
1175 		adc->dfsdm->fl_list[adc->fl_id].sync_mode = val;  in stm32_dfsdm_adc_probe()
1219 		.name = "stm32-dfsdm-adc",