139 static int vadc_read(struct vadc_priv *vadc, u16 offset, u8 *data)  in vadc_read()  argument
141 	return regmap_bulk_read(vadc->regmap, vadc->base + offset, data, 1);  in vadc_read()
144 static int vadc_write(struct vadc_priv *vadc, u16 offset, u8 data)  in vadc_write()  argument
146 	return regmap_write(vadc->regmap, vadc->base + offset, data);  in vadc_write()
149 static int vadc_reset(struct vadc_priv *vadc)  in vadc_reset()  argument
154 	ret = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA);  in vadc_reset()
158 	ret = vadc_read(vadc, VADC_PERH_RESET_CTL3, &data);  in vadc_reset()
162 	ret = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA);  in vadc_reset()
168 	return vadc_write(vadc, VADC_PERH_RESET_CTL3, data);  in vadc_reset()
171 static int vadc_set_state(struct vadc_priv *vadc, bool state)  in vadc_set_state()  argument
173 	return vadc_write(vadc, VADC_EN_CTL1, state ? VADC_EN_CTL1_SET : 0);  in vadc_set_state()
176 static void vadc_show_status(struct vadc_priv *vadc)  in vadc_show_status()  argument
181 	ret = vadc_read(vadc, VADC_MODE_CTL, &mode);  in vadc_show_status()
185 	ret = vadc_read(vadc, VADC_ADC_DIG_PARAM, &dig);  in vadc_show_status()
189 	ret = vadc_read(vadc, VADC_ADC_CH_SEL_CTL, &chan);  in vadc_show_status()
193 	ret = vadc_read(vadc, VADC_CONV_REQ, &req);  in vadc_show_status()
197 	ret = vadc_read(vadc, VADC_STATUS1, &sta1);  in vadc_show_status()
201 	ret = vadc_read(vadc, VADC_EN_CTL1, &en);  in vadc_show_status()
205 	dev_err(vadc->dev,  in vadc_show_status()
210 static int vadc_configure(struct vadc_priv *vadc,  in vadc_configure()  argument
219 	ret = vadc_write(vadc, VADC_MODE_CTL, mode_ctrl);  in vadc_configure()
224 	ret = vadc_write(vadc, VADC_ADC_CH_SEL_CTL, prop->channel);  in vadc_configure()
230 	ret = vadc_write(vadc, VADC_ADC_DIG_PARAM, decimation);  in vadc_configure()
235 	ret = vadc_write(vadc, VADC_HW_SETTLE_DELAY, prop->hw_settle_time);  in vadc_configure()
239 	ret = vadc_write(vadc, VADC_FAST_AVG_CTL, prop->avg_samples);  in vadc_configure()
244 		ret = vadc_write(vadc, VADC_FAST_AVG_EN, VADC_FAST_AVG_EN_SET);  in vadc_configure()
246 		ret = vadc_write(vadc, VADC_FAST_AVG_EN, 0);  in vadc_configure()
251 static int vadc_poll_wait_eoc(struct vadc_priv *vadc, unsigned int interval_us)  in vadc_poll_wait_eoc()  argument
260 		ret = vadc_read(vadc, VADC_STATUS1, &sta1);  in vadc_poll_wait_eoc()
271 	vadc_show_status(vadc);  in vadc_poll_wait_eoc()
276 static int vadc_read_result(struct vadc_priv *vadc, u16 *data)  in vadc_read_result()  argument
280 	ret = regmap_bulk_read(vadc->regmap, vadc->base + VADC_DATA, data, 2);  in vadc_read_result()
289 static struct vadc_channel_prop *vadc_get_channel(struct vadc_priv *vadc,  in vadc_get_channel()  argument
294 	for (i = 0; i < vadc->nchannels; i++)  in vadc_get_channel()
295 		if (vadc->chan_props[i].channel == num)  in vadc_get_channel()
296 			return &vadc->chan_props[i];  in vadc_get_channel()
298 	dev_dbg(vadc->dev, "no such channel %02x\n", num);  in vadc_get_channel()
303 static int vadc_do_conversion(struct vadc_priv *vadc,  in vadc_do_conversion()  argument
309 	mutex_lock(&vadc->lock);  in vadc_do_conversion()
311 	ret = vadc_configure(vadc, prop);  in vadc_do_conversion()
315 	if (!vadc->poll_eoc)  in vadc_do_conversion()
316 		reinit_completion(&vadc->complete);  in vadc_do_conversion()
318 	ret = vadc_set_state(vadc, true);  in vadc_do_conversion()
322 	ret = vadc_write(vadc, VADC_CONV_REQ, VADC_CONV_REQ_SET);  in vadc_do_conversion()
328 	if (vadc->poll_eoc) {  in vadc_do_conversion()
329 		ret = vadc_poll_wait_eoc(vadc, timeout);  in vadc_do_conversion()
331 		ret = wait_for_completion_timeout(&vadc->complete, timeout);  in vadc_do_conversion()
338 		ret = vadc_poll_wait_eoc(vadc, VADC_CONV_TIME_MIN_US);  in vadc_do_conversion()
343 	ret = vadc_read_result(vadc, data);  in vadc_do_conversion()
346 	vadc_set_state(vadc, false);  in vadc_do_conversion()
348 		dev_err(vadc->dev, "conversion failed\n");  in vadc_do_conversion()
350 	mutex_unlock(&vadc->lock);  in vadc_do_conversion()
354 static int vadc_measure_ref_points(struct vadc_priv *vadc)  in vadc_measure_ref_points()  argument
360 	vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE;  in vadc_measure_ref_points()
361 	vadc->graph[VADC_CALIB_ABSOLUTE].dx = VADC_ABSOLUTE_RANGE_UV;  in vadc_measure_ref_points()
363 	prop = vadc_get_channel(vadc, VADC_REF_1250MV);  in vadc_measure_ref_points()
364 	ret = vadc_do_conversion(vadc, prop, &read_1);  in vadc_measure_ref_points()
369 	prop = vadc_get_channel(vadc, VADC_SPARE1);  in vadc_measure_ref_points()
371 		prop = vadc_get_channel(vadc, VADC_REF_625MV);  in vadc_measure_ref_points()
373 	ret = vadc_do_conversion(vadc, prop, &read_2);  in vadc_measure_ref_points()
382 	vadc->graph[VADC_CALIB_ABSOLUTE].dy = read_1 - read_2;  in vadc_measure_ref_points()
383 	vadc->graph[VADC_CALIB_ABSOLUTE].gnd = read_2;  in vadc_measure_ref_points()
386 	prop = vadc_get_channel(vadc, VADC_VDD_VADC);  in vadc_measure_ref_points()
387 	ret = vadc_do_conversion(vadc, prop, &read_1);  in vadc_measure_ref_points()
391 	prop = vadc_get_channel(vadc, VADC_GND_REF);  in vadc_measure_ref_points()
392 	ret = vadc_do_conversion(vadc, prop, &read_2);  in vadc_measure_ref_points()
401 	vadc->graph[VADC_CALIB_RATIOMETRIC].dy = read_1 - read_2;  in vadc_measure_ref_points()
402 	vadc->graph[VADC_CALIB_RATIOMETRIC].gnd = read_2;  in vadc_measure_ref_points()
405 		dev_err(vadc->dev, "measure reference points failed\n");  in vadc_measure_ref_points()
450 	struct vadc_priv *vadc = iio_priv(indio_dev);  in vadc_read_raw()  local
457 		prop = &vadc->chan_props[chan->address];  in vadc_read_raw()
458 		ret = vadc_do_conversion(vadc, prop, &adc_code);  in vadc_read_raw()
463 				&vadc->graph[prop->calibration],  in vadc_read_raw()
472 		prop = &vadc->chan_props[chan->address];  in vadc_read_raw()
473 		ret = vadc_do_conversion(vadc, prop, &adc_code);  in vadc_read_raw()
490 	struct vadc_priv *vadc = iio_priv(indio_dev);  in vadc_fwnode_xlate()  local
493 	for (i = 0; i < vadc->nchannels; i++)  in vadc_fwnode_xlate()
494 		if (vadc->iio_chans[i].channel == iiospec->args[0])  in vadc_fwnode_xlate()
503 	struct vadc_priv *vadc = iio_priv(indio_dev);  in vadc_read_label()  local
504 	const char *name = vadc->chan_props[chan->address].channel_name;  in vadc_read_label()
752 static int vadc_get_fw_data(struct vadc_priv *vadc)  in vadc_get_fw_data()  argument
761 	vadc->nchannels = device_get_child_node_count(vadc->dev);  in vadc_get_fw_data()
762 	if (!vadc->nchannels)  in vadc_get_fw_data()
765 	vadc->iio_chans = devm_kcalloc(vadc->dev, vadc->nchannels,  in vadc_get_fw_data()
766 				       sizeof(*vadc->iio_chans), GFP_KERNEL);  in vadc_get_fw_data()
767 	if (!vadc->iio_chans)  in vadc_get_fw_data()
770 	vadc->chan_props = devm_kcalloc(vadc->dev, vadc->nchannels,  in vadc_get_fw_data()
771 					sizeof(*vadc->chan_props), GFP_KERNEL);  in vadc_get_fw_data()
772 	if (!vadc->chan_props)  in vadc_get_fw_data()
775 	iio_chan = vadc->iio_chans;  in vadc_get_fw_data()
777 	device_for_each_child_node(vadc->dev, child) {  in vadc_get_fw_data()
778 		ret = vadc_get_fw_channel_data(vadc->dev, &prop, child);  in vadc_get_fw_data()
785 		vadc->chan_props[index] = prop;  in vadc_get_fw_data()
800 	if (!vadc_get_channel(vadc, VADC_REF_1250MV)) {  in vadc_get_fw_data()
801 		dev_err(vadc->dev, "Please define 1.25V channel\n");  in vadc_get_fw_data()
805 	if (!vadc_get_channel(vadc, VADC_REF_625MV)) {  in vadc_get_fw_data()
806 		dev_err(vadc->dev, "Please define 0.625V channel\n");  in vadc_get_fw_data()
810 	if (!vadc_get_channel(vadc, VADC_VDD_VADC)) {  in vadc_get_fw_data()
811 		dev_err(vadc->dev, "Please define VDD channel\n");  in vadc_get_fw_data()
815 	if (!vadc_get_channel(vadc, VADC_GND_REF)) {  in vadc_get_fw_data()
816 		dev_err(vadc->dev, "Please define GND channel\n");  in vadc_get_fw_data()
825 	struct vadc_priv *vadc = dev_id;  in vadc_isr()  local
827 	complete(&vadc->complete);  in vadc_isr()
832 static int vadc_check_revision(struct vadc_priv *vadc)  in vadc_check_revision()  argument
837 	ret = vadc_read(vadc, VADC_PERPH_TYPE, &val);  in vadc_check_revision()
842 		dev_err(vadc->dev, "%d is not ADC\n", val);  in vadc_check_revision()
846 	ret = vadc_read(vadc, VADC_PERPH_SUBTYPE, &val);  in vadc_check_revision()
851 		dev_err(vadc->dev, "%d is not VADC\n", val);  in vadc_check_revision()
855 	ret = vadc_read(vadc, VADC_REVISION2, &val);  in vadc_check_revision()
860 		dev_err(vadc->dev, "revision %d not supported\n", val);  in vadc_check_revision()
871 	struct vadc_priv *vadc;  in vadc_probe()  local
884 	indio_dev = devm_iio_device_alloc(dev, sizeof(*vadc));  in vadc_probe()
888 	vadc = iio_priv(indio_dev);  in vadc_probe()
889 	vadc->regmap = regmap;  in vadc_probe()
890 	vadc->dev = dev;  in vadc_probe()
891 	vadc->base = reg;  in vadc_probe()
892 	vadc->are_ref_measured = false;  in vadc_probe()
893 	init_completion(&vadc->complete);  in vadc_probe()
894 	mutex_init(&vadc->lock);  in vadc_probe()
896 	ret = vadc_check_revision(vadc);  in vadc_probe()
900 	ret = vadc_get_fw_data(vadc);  in vadc_probe()
908 		vadc->poll_eoc = true;  in vadc_probe()
911 				       "spmi-vadc", vadc);  in vadc_probe()
916 	ret = vadc_reset(vadc);  in vadc_probe()
922 	ret = vadc_measure_ref_points(vadc);  in vadc_probe()
929 	indio_dev->channels = vadc->iio_chans;  in vadc_probe()
930 	indio_dev->num_channels = vadc->nchannels;  in vadc_probe()