1 // SPDX-License-Identifier: GPL-2.0
10 #include <linux/iio/adc/qcom-vadc-common.h>
23 #include <dt-bindings/iio/qcom,spmi-vadc.h>
104  * struct adc5_channel_prop - ADC channel property.
113  * @avg_samples: ability to provide single result from the ADC
133  * struct adc5_chip - ADC private structure.
136  * @base: base address for the ADC peripheral.
137  * @nchannels: number of ADC channels.
138  * @chan_props: array of ADC channel properties.
141  * @complete: ADC result notification after interrupt is received.
142  * @lock: ADC lock for access to the peripheral.
158 static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len)  in adc5_read()  argument
160 	return regmap_bulk_read(adc->regmap, adc->base + offset, data, len);  in adc5_read()
163 static int adc5_write(struct adc5_chip *adc, u16 offset, u8 *data, int len)  in adc5_write()  argument
165 	return regmap_bulk_write(adc->regmap, adc->base + offset, data, len);  in adc5_write()
168 static int adc5_masked_write(struct adc5_chip *adc, u16 offset, u8 mask, u8 val)  in adc5_masked_write()  argument
170 	return regmap_update_bits(adc->regmap, adc->base + offset, mask, val);  in adc5_masked_write()
173 static int adc5_read_voltage_data(struct adc5_chip *adc, u16 *data)  in adc5_read_voltage_data()  argument
178 	ret = adc5_read(adc, ADC5_USR_DATA0, &rslt_lsb, sizeof(rslt_lsb));  in adc5_read_voltage_data()
182 	ret = adc5_read(adc, ADC5_USR_DATA1, &rslt_msb, sizeof(rslt_lsb));  in adc5_read_voltage_data()
189 		dev_err(adc->dev, "Invalid data:0x%x\n", *data);  in adc5_read_voltage_data()
190 		return -EINVAL;  in adc5_read_voltage_data()
193 	dev_dbg(adc->dev, "voltage raw code:0x%x\n", *data);  in adc5_read_voltage_data()
198 static int adc5_poll_wait_eoc(struct adc5_chip *adc)  in adc5_poll_wait_eoc()  argument
205 		ret = adc5_read(adc, ADC5_USR_STATUS1, &status1,  in adc5_poll_wait_eoc()
217 	return -ETIMEDOUT;  in adc5_poll_wait_eoc()
220 static void adc5_update_dig_param(struct adc5_chip *adc,  in adc5_update_dig_param()  argument
225 	*data |= (prop->cal_val << ADC5_USR_DIG_PARAM_CAL_VAL_SHIFT);  in adc5_update_dig_param()
229 	*data |= (prop->cal_method << ADC5_USR_DIG_PARAM_CAL_SEL_SHIFT);  in adc5_update_dig_param()
233 	*data |= (prop->decimation << ADC5_USR_DIG_PARAM_DEC_RATIO_SEL_SHIFT);  in adc5_update_dig_param()
236 static int adc5_configure(struct adc5_chip *adc,  in adc5_configure()  argument
243 	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));  in adc5_configure()
248 	adc5_update_dig_param(adc, prop, &buf[0]);  in adc5_configure()
252 	buf[1] |= prop->avg_samples;  in adc5_configure()
254 	/* Select ADC channel */  in adc5_configure()
255 	buf[2] = prop->channel;  in adc5_configure()
259 	buf[3] |= prop->hw_settle_time;  in adc5_configure()
261 	/* Select ADC enable */  in adc5_configure()
267 	if (!adc->poll_eoc)  in adc5_configure()
268 		reinit_completion(&adc->complete);  in adc5_configure()
270 	return adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));  in adc5_configure()
273 static int adc7_configure(struct adc5_chip *adc,  in adc7_configure()  argument
279 	ret = adc5_masked_write(adc, ADC_APP_SID, ADC_APP_SID_MASK, prop->sid);  in adc7_configure()
283 	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));  in adc7_configure()
288 	adc5_update_dig_param(adc, prop, &buf[0]);  in adc7_configure()
292 	buf[1] |= prop->avg_samples;  in adc7_configure()
294 	/* Select ADC channel */  in adc7_configure()
295 	buf[2] = prop->channel;  in adc7_configure()
299 	buf[3] |= prop->hw_settle_time;  in adc7_configure()
304 	if (!adc->poll_eoc)  in adc7_configure()
305 		reinit_completion(&adc->complete);  in adc7_configure()
307 	ret = adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));  in adc7_configure()
311 	return adc5_write(adc, ADC5_USR_CONV_REQ, &conv_req, 1);  in adc7_configure()
314 static int adc5_do_conversion(struct adc5_chip *adc,  in adc5_do_conversion()  argument
316 			struct iio_chan_spec const *chan,  in adc5_do_conversion()  argument
321 	mutex_lock(&adc->lock);  in adc5_do_conversion()
323 	ret = adc5_configure(adc, prop);  in adc5_do_conversion()
325 		dev_err(adc->dev, "ADC configure failed with %d\n", ret);  in adc5_do_conversion()
329 	if (adc->poll_eoc) {  in adc5_do_conversion()
330 		ret = adc5_poll_wait_eoc(adc);  in adc5_do_conversion()
332 			dev_err(adc->dev, "EOC bit not set\n");  in adc5_do_conversion()
336 		ret = wait_for_completion_timeout(&adc->complete,  in adc5_do_conversion()
339 			dev_dbg(adc->dev, "Did not get completion timeout.\n");  in adc5_do_conversion()
340 			ret = adc5_poll_wait_eoc(adc);  in adc5_do_conversion()
342 				dev_err(adc->dev, "EOC bit not set\n");  in adc5_do_conversion()
348 	ret = adc5_read_voltage_data(adc, data_volt);  in adc5_do_conversion()
350 	mutex_unlock(&adc->lock);  in adc5_do_conversion()
355 static int adc7_do_conversion(struct adc5_chip *adc,  in adc7_do_conversion()  argument
357 			struct iio_chan_spec const *chan,  in adc7_do_conversion()  argument
363 	mutex_lock(&adc->lock);  in adc7_do_conversion()
365 	ret = adc7_configure(adc, prop);  in adc7_do_conversion()
367 		dev_err(adc->dev, "ADC configure failed with %d\n", ret);  in adc7_do_conversion()
372 	wait_for_completion_timeout(&adc->complete, ADC7_CONV_TIMEOUT);  in adc7_do_conversion()
374 	ret = adc5_read(adc, ADC5_USR_STATUS1, &status, 1);  in adc7_do_conversion()
379 		dev_err(adc->dev, "Unexpected conversion fault\n");  in adc7_do_conversion()
380 		ret = -EIO;  in adc7_do_conversion()
384 	ret = adc5_read_voltage_data(adc, data_volt);  in adc7_do_conversion()
387 	mutex_unlock(&adc->lock);  in adc7_do_conversion()
392 typedef int (*adc_do_conversion)(struct adc5_chip *adc,
394 			struct iio_chan_spec const *chan,
399 	struct adc5_chip *adc = dev_id;  in adc5_isr()  local
401 	complete(&adc->complete);  in adc5_isr()
409 	struct adc5_chip *adc = iio_priv(indio_dev);  in adc5_of_xlate()  local
412 	for (i = 0; i < adc->nchannels; i++)  in adc5_of_xlate()
413 		if (adc->chan_props[i].channel == iiospec->args[0])  in adc5_of_xlate()
416 	return -EINVAL;  in adc5_of_xlate()
422 	struct adc5_chip *adc = iio_priv(indio_dev);  in adc7_of_xlate()  local
425 	for (i = 0; i < adc->nchannels; i++) {  in adc7_of_xlate()
426 		v_channel = (adc->chan_props[i].sid << ADC_CHANNEL_OFFSET) |  in adc7_of_xlate()
427 			adc->chan_props[i].channel;  in adc7_of_xlate()
428 		if (v_channel == iiospec->args[0])  in adc7_of_xlate()
432 	return -EINVAL;  in adc7_of_xlate()
436 			 struct iio_chan_spec const *chan, int *val, int *val2,  in adc_read_raw_common()  argument
439 	struct adc5_chip *adc = iio_priv(indio_dev);  in adc_read_raw_common()  local
444 	prop = &adc->chan_props[chan->address];  in adc_read_raw_common()
448 		ret = do_conv(adc, prop, chan,  in adc_read_raw_common()
453 		ret = qcom_adc5_hw_scale(prop->scale_fn_type,  in adc_read_raw_common()
454 			prop->prescale,  in adc_read_raw_common()
455 			adc->data,  in adc_read_raw_common()
462 		return -EINVAL;  in adc_read_raw_common()
467 			 struct iio_chan_spec const *chan, int *val, int *val2,  in adc5_read_raw()  argument
470 	return adc_read_raw_common(indio_dev, chan, val, val2,  in adc5_read_raw()
475 			 struct iio_chan_spec const *chan, int *val, int *val2,  in adc7_read_raw()  argument
478 	return adc_read_raw_common(indio_dev, chan, val, val2,  in adc7_read_raw()
614 static int adc5_get_dt_channel_data(struct adc5_chip *adc,  in adc5_get_dt_channel_data()  argument
619 	const char *name = node->name, *channel_name;  in adc5_get_dt_channel_data()
620 	u32 chan, value, varr[2];  in adc5_get_dt_channel_data()  local
623 	struct device *dev = adc->dev;  in adc5_get_dt_channel_data()
625 	ret = of_property_read_u32(node, "reg", &chan);  in adc5_get_dt_channel_data()
635 	if (adc->data->info == &adc7_info) {  in adc5_get_dt_channel_data()
636 		sid = chan >> ADC_CHANNEL_OFFSET;  in adc5_get_dt_channel_data()
637 		chan = chan & ADC_CHANNEL_MASK;  in adc5_get_dt_channel_data()
640 	if (chan > ADC5_PARALLEL_ISENSE_VBAT_IDATA ||  in adc5_get_dt_channel_data()
641 	    !data->adc_chans[chan].datasheet_name) {  in adc5_get_dt_channel_data()
642 		dev_err(dev, "%s invalid channel number %d\n", name, chan);  in adc5_get_dt_channel_data()
643 		return -EINVAL;  in adc5_get_dt_channel_data()
647 	prop->channel = chan;  in adc5_get_dt_channel_data()
648 	prop->sid = sid;  in adc5_get_dt_channel_data()
651 				"label", NULL) ? : node->name;  in adc5_get_dt_channel_data()
654 		return -EINVAL;  in adc5_get_dt_channel_data()
656 	prop->datasheet_name = channel_name;  in adc5_get_dt_channel_data()
660 		ret = qcom_adc5_decimation_from_dt(value, data->decimation);  in adc5_get_dt_channel_data()
663 				chan, value);  in adc5_get_dt_channel_data()
666 		prop->decimation = ret;  in adc5_get_dt_channel_data()
668 		prop->decimation = ADC5_DECIMATION_DEFAULT;  in adc5_get_dt_channel_data()
671 	ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2);  in adc5_get_dt_channel_data()
675 			dev_err(dev, "%02x invalid pre-scaling <%d %d>\n",  in adc5_get_dt_channel_data()
676 				chan, varr[0], varr[1]);  in adc5_get_dt_channel_data()
679 		prop->prescale = ret;  in adc5_get_dt_channel_data()
681 		prop->prescale =  in adc5_get_dt_channel_data()
682 			adc->data->adc_chans[prop->channel].prescale_index;  in adc5_get_dt_channel_data()
685 	ret = of_property_read_u32(node, "qcom,hw-settle-time", &value);  in adc5_get_dt_channel_data()
689 		ret = adc5_read(adc, ADC5_USR_REVISION1, dig_version,  in adc5_get_dt_channel_data()
701 			adc->data->info == &adc7_info)  in adc5_get_dt_channel_data()
702 			ret = qcom_adc5_hw_settle_time_from_dt(value, data->hw_settle_2);  in adc5_get_dt_channel_data()
704 			ret = qcom_adc5_hw_settle_time_from_dt(value, data->hw_settle_1);  in adc5_get_dt_channel_data()
707 			dev_err(dev, "%02x invalid hw-settle-time %d us\n",  in adc5_get_dt_channel_data()
708 				chan, value);  in adc5_get_dt_channel_data()
711 		prop->hw_settle_time = ret;  in adc5_get_dt_channel_data()
713 		prop->hw_settle_time = VADC_DEF_HW_SETTLE_TIME;  in adc5_get_dt_channel_data()
716 	ret = of_property_read_u32(node, "qcom,avg-samples", &value);  in adc5_get_dt_channel_data()
720 			dev_err(dev, "%02x invalid avg-samples %d\n",  in adc5_get_dt_channel_data()
721 				chan, value);  in adc5_get_dt_channel_data()
724 		prop->avg_samples = ret;  in adc5_get_dt_channel_data()
726 		prop->avg_samples = VADC_DEF_AVG_SAMPLES;  in adc5_get_dt_channel_data()
730 		prop->cal_method = ADC5_RATIOMETRIC_CAL;  in adc5_get_dt_channel_data()
732 		prop->cal_method = ADC5_ABSOLUTE_CAL;  in adc5_get_dt_channel_data()
738 	prop->cal_val = ADC5_TIMER_CAL;  in adc5_get_dt_channel_data()
740 	dev_dbg(dev, "%02x name %s\n", chan, name);  in adc5_get_dt_channel_data()
789 		.compatible = "qcom,spmi-adc5",
793 		.compatible = "qcom,spmi-adc7",
797 		.compatible = "qcom,spmi-adc-rev2",
804 static int adc5_get_dt_data(struct adc5_chip *adc, struct device_node *node)  in adc5_get_dt_data()  argument
813 	adc->nchannels = of_get_available_child_count(node);  in adc5_get_dt_data()
814 	if (!adc->nchannels)  in adc5_get_dt_data()
815 		return -EINVAL;  in adc5_get_dt_data()
817 	adc->iio_chans = devm_kcalloc(adc->dev, adc->nchannels,  in adc5_get_dt_data()
818 				       sizeof(*adc->iio_chans), GFP_KERNEL);  in adc5_get_dt_data()
819 	if (!adc->iio_chans)  in adc5_get_dt_data()
820 		return -ENOMEM;  in adc5_get_dt_data()
822 	adc->chan_props = devm_kcalloc(adc->dev, adc->nchannels,  in adc5_get_dt_data()
823 					sizeof(*adc->chan_props), GFP_KERNEL);  in adc5_get_dt_data()
824 	if (!adc->chan_props)  in adc5_get_dt_data()
825 		return -ENOMEM;  in adc5_get_dt_data()
827 	chan_props = adc->chan_props;  in adc5_get_dt_data()
828 	iio_chan = adc->iio_chans;  in adc5_get_dt_data()
829 	adc->data = of_device_get_match_data(adc->dev);  in adc5_get_dt_data()
830 	if (!adc->data)  in adc5_get_dt_data()
831 		adc->data = &adc5_data_pmic;  in adc5_get_dt_data()
834 		ret = adc5_get_dt_channel_data(adc, &prop, child, adc->data);  in adc5_get_dt_data()
841 			adc->data->adc_chans[prop.channel].scale_fn_type;  in adc5_get_dt_data()
843 		adc_chan = &adc->data->adc_chans[prop.channel];  in adc5_get_dt_data()
845 		iio_chan->channel = prop.channel;  in adc5_get_dt_data()
846 		iio_chan->datasheet_name = prop.datasheet_name;  in adc5_get_dt_data()
847 		iio_chan->extend_name = prop.datasheet_name;  in adc5_get_dt_data()
848 		iio_chan->info_mask_separate = adc_chan->info_mask;  in adc5_get_dt_data()
849 		iio_chan->type = adc_chan->type;  in adc5_get_dt_data()
850 		iio_chan->address = index;  in adc5_get_dt_data()
861 	struct device_node *node = pdev->dev.of_node;  in adc5_probe()
862 	struct device *dev = &pdev->dev;  in adc5_probe()
864 	struct adc5_chip *adc;  in adc5_probe()  local
869 	regmap = dev_get_regmap(dev->parent, NULL);  in adc5_probe()
871 		return -ENODEV;  in adc5_probe()
877 	indio_dev = devm_iio_device_alloc(dev, sizeof(*adc));  in adc5_probe()
879 		return -ENOMEM;  in adc5_probe()
881 	adc = iio_priv(indio_dev);  in adc5_probe()
882 	adc->regmap = regmap;  in adc5_probe()
883 	adc->dev = dev;  in adc5_probe()
884 	adc->base = reg;  in adc5_probe()
886 	init_completion(&adc->complete);  in adc5_probe()
887 	mutex_init(&adc->lock);  in adc5_probe()
889 	ret = adc5_get_dt_data(adc, node);  in adc5_probe()
891 		dev_err(dev, "adc get dt data failed\n");  in adc5_probe()
897 		if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL)  in adc5_probe()
899 		adc->poll_eoc = true;  in adc5_probe()
902 				       "pm-adc5", adc);  in adc5_probe()
907 	indio_dev->name = pdev->name;  in adc5_probe()
908 	indio_dev->modes = INDIO_DIRECT_MODE;  in adc5_probe()
909 	indio_dev->info = adc->data->info;  in adc5_probe()
910 	indio_dev->channels = adc->iio_chans;  in adc5_probe()
911 	indio_dev->num_channels = adc->nchannels;  in adc5_probe()
918 		.name = "qcom-spmi-adc5",
925 MODULE_ALIAS("platform:qcom-spmi-adc5");
926 MODULE_DESCRIPTION("Qualcomm Technologies Inc. PMIC5 ADC driver");