1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) ST-Ericsson SA 2010
15  * detection by resistance measurements using relative voltages and GSM burst
54 /* 0 = use VTVOUT, 1 = use VRTC as pull-up supply for battery temp NTC */
63  * the bit layout is the same for SW and HW conversion set-up
163 #define AB8500_ADC_CH_IBAT_MIN		(-6000) /* mA range measured by ADC for ibat */
165 #define AB8500_ADC_CH_IBAT_MIN_V	(-60)	/* mV range measured by ADC for ibat */
167 #define AB8500_GPADC_IBAT_VDROP_L	(-56)  /* mV */
192  * struct ab8500_adc_cal_data - Table for storing gain and offset for the
207  * struct ab8500_gpadc_chan_info - per-channel GPADC info
230  * struct ab8500_gpadc - AB8500 GPADC device information
233  * @chans: internal per-channel information container
260 	for (i = 0; i < gpadc->nchans; i++) {  in ab8500_gpadc_get_channel()
261 		ch = &gpadc->chans[i];  in ab8500_gpadc_get_channel()
262 		if (ch->id == chan)  in ab8500_gpadc_get_channel()
265 	if (i == gpadc->nchans)  in ab8500_gpadc_get_channel()
272  * ab8500_gpadc_ad_to_voltage() - Convert a raw ADC value to a voltage
286 		if (!gpadc->cal_data[AB8500_CAL_VMAIN].gain) {  in ab8500_gpadc_ad_to_voltage()
287 			res = AB8500_ADC_CH_CHG_V_MIN + (AB8500_ADC_CH_CHG_V_MAX -  in ab8500_gpadc_ad_to_voltage()
293 		res = (int) (ad_value * gpadc->cal_data[AB8500_CAL_VMAIN].gain +  in ab8500_gpadc_ad_to_voltage()
294 			gpadc->cal_data[AB8500_CAL_VMAIN].offset) / AB8500_GPADC_CALIB_SCALE;  in ab8500_gpadc_ad_to_voltage()
304 		if (!gpadc->cal_data[AB8500_CAL_BTEMP].gain) {  in ab8500_gpadc_ad_to_voltage()
305 			res = AB8500_ADC_CH_BTEMP_MIN + (AB8500_ADC_CH_BTEMP_MAX -  in ab8500_gpadc_ad_to_voltage()
311 		res = (int) (ad_value * gpadc->cal_data[AB8500_CAL_BTEMP].gain +  in ab8500_gpadc_ad_to_voltage()
312 			gpadc->cal_data[AB8500_CAL_BTEMP].offset) / AB8500_GPADC_CALIB_SCALE;  in ab8500_gpadc_ad_to_voltage()
318 		if (!gpadc->cal_data[AB8500_CAL_VBAT].gain) {  in ab8500_gpadc_ad_to_voltage()
319 			res = AB8500_ADC_CH_VBAT_MIN + (AB8500_ADC_CH_VBAT_MAX -  in ab8500_gpadc_ad_to_voltage()
325 		res = (int) (ad_value * gpadc->cal_data[AB8500_CAL_VBAT].gain +  in ab8500_gpadc_ad_to_voltage()
326 			gpadc->cal_data[AB8500_CAL_VBAT].offset) / AB8500_GPADC_CALIB_SCALE;  in ab8500_gpadc_ad_to_voltage()
331 			(AB8500_ADC_CH_DIETEMP_MAX - AB8500_ADC_CH_DIETEMP_MIN) * ad_value /  in ab8500_gpadc_ad_to_voltage()
337 			(AB8500_ADC_CH_ACCDET2_MAX - AB8500_ADC_CH_ACCDET2_MIN) * ad_value /  in ab8500_gpadc_ad_to_voltage()
343 			(AB8500_ADC_CH_CHG_V_MAX - AB8500_ADC_CH_CHG_V_MIN) * ad_value /  in ab8500_gpadc_ad_to_voltage()
350 			(AB8500_ADC_CH_CHG_I_MAX - AB8500_ADC_CH_CHG_I_MIN) * ad_value /  in ab8500_gpadc_ad_to_voltage()
356 			(AB8500_ADC_CH_BKBAT_MAX - AB8500_ADC_CH_BKBAT_MIN) * ad_value /  in ab8500_gpadc_ad_to_voltage()
362 		if (!gpadc->cal_data[AB8500_CAL_IBAT].gain) {  in ab8500_gpadc_ad_to_voltage()
363 			res = AB8500_ADC_CH_IBAT_MIN + (AB8500_ADC_CH_IBAT_MAX -  in ab8500_gpadc_ad_to_voltage()
369 		res = (int) (ad_value * gpadc->cal_data[AB8500_CAL_IBAT].gain +  in ab8500_gpadc_ad_to_voltage()
370 				gpadc->cal_data[AB8500_CAL_IBAT].offset)  in ab8500_gpadc_ad_to_voltage()
375 		dev_err(gpadc->dev,  in ab8500_gpadc_ad_to_voltage()
378 		res = -EINVAL;  in ab8500_gpadc_ad_to_voltage()
402 		return -ENODEV;  in ab8500_gpadc_read()
405 	if ((gpadc->irq_sw <= 0) && !ch->hardware_control)  in ab8500_gpadc_read()
406 		return -ENOTSUPP;  in ab8500_gpadc_read()
407 	if ((gpadc->irq_hw <= 0) && ch->hardware_control)  in ab8500_gpadc_read()
408 		return -ENOTSUPP;  in ab8500_gpadc_read()
411 	pm_runtime_get_sync(gpadc->dev);  in ab8500_gpadc_read()
415 		ret = abx500_get_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
424 		dev_err(gpadc->dev, "gpadc_conversion: GPADC busy");  in ab8500_gpadc_read()
425 		ret = -EINVAL;  in ab8500_gpadc_read()
433 	switch (ch->avg_sample) {  in ab8500_gpadc_read()
435 		ctrl23 = ch->id | AB8500_GPADC_CTRL2_AVG_1;  in ab8500_gpadc_read()
438 		ctrl23 = ch->id | AB8500_GPADC_CTRL2_AVG_4;  in ab8500_gpadc_read()
441 		ctrl23 = ch->id | AB8500_GPADC_CTRL2_AVG_8;  in ab8500_gpadc_read()
444 		ctrl23 = ch->id | AB8500_GPADC_CTRL2_AVG_16;  in ab8500_gpadc_read()
448 	if (ch->hardware_control) {  in ab8500_gpadc_read()
449 		ret = abx500_set_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
452 		if (ch->falling_edge)  in ab8500_gpadc_read()
455 		ret = abx500_set_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
459 		dev_err(gpadc->dev,  in ab8500_gpadc_read()
469 	switch (ch->id) {  in ab8500_gpadc_read()
476 		if (!is_ab8500_2p0_or_earlier(gpadc->ab8500)) {  in ab8500_gpadc_read()
494 	ret = abx500_set_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
497 		dev_err(gpadc->dev,  in ab8500_gpadc_read()
505 	if (ch->hardware_control) {  in ab8500_gpadc_read()
507 		ret = abx500_set_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
509 			ch->trig_timer);  in ab8500_gpadc_read()
511 			dev_err(gpadc->dev,  in ab8500_gpadc_read()
520 		ret = abx500_mask_and_set_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
525 			dev_err(gpadc->dev,  in ab8500_gpadc_read()
535 	if (!wait_for_completion_timeout(&gpadc->complete,  in ab8500_gpadc_read()
537 		dev_err(gpadc->dev,  in ab8500_gpadc_read()
539 		ret = -EINVAL;  in ab8500_gpadc_read()
544 	ret = abx500_get_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
547 		dev_err(gpadc->dev,  in ab8500_gpadc_read()
552 	ret = abx500_get_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
555 		dev_err(gpadc->dev,  in ab8500_gpadc_read()
561 	if ((ch->id == AB8500_GPADC_CHAN_BAT_CTRL_AND_IBAT) ||  in ab8500_gpadc_read()
562 	    (ch->id == AB8500_GPADC_CHAN_VBAT_MEAS_AND_IBAT) ||  in ab8500_gpadc_read()
563 	    (ch->id == AB8500_GPADC_CHAN_VBAT_TRUE_MEAS_AND_IBAT) ||  in ab8500_gpadc_read()
564 	    (ch->id == AB8500_GPADC_CHAN_BAT_TEMP_AND_IBAT)) {  in ab8500_gpadc_read()
566 		if (ch->hardware_control) {  in ab8500_gpadc_read()
568 			ret = -ENOTSUPP;  in ab8500_gpadc_read()
569 			dev_err(gpadc->dev,  in ab8500_gpadc_read()
574 			ret = abx500_get_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
578 				dev_err(gpadc->dev,  in ab8500_gpadc_read()
583 			ret = abx500_get_register_interruptible(gpadc->dev,  in ab8500_gpadc_read()
587 				dev_err(gpadc->dev,  in ab8500_gpadc_read()
594 				dev_warn(gpadc->dev,  in ab8500_gpadc_read()
602 	ret = abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC,  in ab8500_gpadc_read()
605 		dev_err(gpadc->dev, "gpadc_conversion: disable gpadc failed\n");  in ab8500_gpadc_read()
610 	pm_runtime_mark_last_busy(gpadc->dev);  in ab8500_gpadc_read()
611 	pm_runtime_put_autosuspend(gpadc->dev);  in ab8500_gpadc_read()
622 	(void) abx500_set_register_interruptible(gpadc->dev, AB8500_GPADC,  in ab8500_gpadc_read()
624 	pm_runtime_put(gpadc->dev);  in ab8500_gpadc_read()
625 	dev_err(gpadc->dev,  in ab8500_gpadc_read()
626 		"gpadc_conversion: Failed to AD convert channel %d\n", ch->id);  in ab8500_gpadc_read()
632  * ab8500_bm_gpadcconvend_handler() - isr for gpadc conversion completion
645 	complete(&gpadc->complete);  in ab8500_bm_gpadcconvend_handler()
681 		ret[i] = abx500_get_register_interruptible(gpadc->dev,  in ab8500_gpadc_read_calibration_data()
685 			dev_err(gpadc->dev, "%s: read otp reg 0x%02x failed\n",  in ab8500_gpadc_read_calibration_data()
688 			/* Put this in the entropy pool as device-unique */  in ab8500_gpadc_read_calibration_data()
761 	if (is_ab8540(gpadc->ab8500)) {  in ab8500_gpadc_read_calibration_data()
768 			gpadc->cal_data[AB8500_CAL_VMAIN].otp_calib_hi =  in ab8500_gpadc_read_calibration_data()
770 			gpadc->cal_data[AB8500_CAL_VMAIN].otp_calib_lo =  in ab8500_gpadc_read_calibration_data()
773 			gpadc->cal_data[AB8500_CAL_VMAIN].gain = AB8500_GPADC_CALIB_SCALE *  in ab8500_gpadc_read_calibration_data()
774 				(19500 - 315) / (vmain_high - vmain_low);  in ab8500_gpadc_read_calibration_data()
775 			gpadc->cal_data[AB8500_CAL_VMAIN].offset = AB8500_GPADC_CALIB_SCALE *  in ab8500_gpadc_read_calibration_data()
776 				19500 - (AB8500_GPADC_CALIB_SCALE * (19500 - 315) /  in ab8500_gpadc_read_calibration_data()
777 				(vmain_high - vmain_low)) * vmain_high;  in ab8500_gpadc_read_calibration_data()
779 			gpadc->cal_data[AB8500_CAL_VMAIN].gain = 0;  in ab8500_gpadc_read_calibration_data()
785 					gpadc->dev, AB8500_OTP_EMUL,  in ab8500_gpadc_read_calibration_data()
788 				dev_err(gpadc->dev,  in ab8500_gpadc_read_calibration_data()
800 			gpadc->cal_data[AB8500_CAL_IBAT].otp_calib_hi =  in ab8500_gpadc_read_calibration_data()
802 			gpadc->cal_data[AB8500_CAL_IBAT].otp_calib_lo =  in ab8500_gpadc_read_calibration_data()
805 			V_gain = ((AB8500_GPADC_IBAT_VDROP_H - AB8500_GPADC_IBAT_VDROP_L)  in ab8500_gpadc_read_calibration_data()
806 				<< AB8500_GPADC_CALIB_SHIFT_IBAT) / (ibat_high - ibat_low);  in ab8500_gpadc_read_calibration_data()
808 			V_offset = (AB8500_GPADC_IBAT_VDROP_H << AB8500_GPADC_CALIB_SHIFT_IBAT) -  in ab8500_gpadc_read_calibration_data()
809 				(((AB8500_GPADC_IBAT_VDROP_H - AB8500_GPADC_IBAT_VDROP_L) <<  in ab8500_gpadc_read_calibration_data()
810 				AB8500_GPADC_CALIB_SHIFT_IBAT) / (ibat_high - ibat_low))  in ab8500_gpadc_read_calibration_data()
816 			V2A_gain = (AB8500_ADC_CH_IBAT_MAX - AB8500_ADC_CH_IBAT_MIN)/  in ab8500_gpadc_read_calibration_data()
817 				(AB8500_ADC_CH_IBAT_MAX_V - AB8500_ADC_CH_IBAT_MIN_V);  in ab8500_gpadc_read_calibration_data()
818 			V2A_offset = ((AB8500_ADC_CH_IBAT_MAX_V * AB8500_ADC_CH_IBAT_MIN -  in ab8500_gpadc_read_calibration_data()
821 				/ (AB8500_ADC_CH_IBAT_MAX_V - AB8500_ADC_CH_IBAT_MIN_V);  in ab8500_gpadc_read_calibration_data()
823 			gpadc->cal_data[AB8500_CAL_IBAT].gain =  in ab8500_gpadc_read_calibration_data()
825 			gpadc->cal_data[AB8500_CAL_IBAT].offset =  in ab8500_gpadc_read_calibration_data()
828 			gpadc->cal_data[AB8500_CAL_IBAT].gain = 0;  in ab8500_gpadc_read_calibration_data()
838 			gpadc->cal_data[AB8500_CAL_VMAIN].otp_calib_hi =  in ab8500_gpadc_read_calibration_data()
840 			gpadc->cal_data[AB8500_CAL_VMAIN].otp_calib_lo =  in ab8500_gpadc_read_calibration_data()
843 			gpadc->cal_data[AB8500_CAL_VMAIN].gain = AB8500_GPADC_CALIB_SCALE *  in ab8500_gpadc_read_calibration_data()
844 				(19500 - 315) / (vmain_high - vmain_low);  in ab8500_gpadc_read_calibration_data()
846 			gpadc->cal_data[AB8500_CAL_VMAIN].offset = AB8500_GPADC_CALIB_SCALE *  in ab8500_gpadc_read_calibration_data()
847 				19500 - (AB8500_GPADC_CALIB_SCALE * (19500 - 315) /  in ab8500_gpadc_read_calibration_data()
848 				(vmain_high - vmain_low)) * vmain_high;  in ab8500_gpadc_read_calibration_data()
850 			gpadc->cal_data[AB8500_CAL_VMAIN].gain = 0;  in ab8500_gpadc_read_calibration_data()
860 		gpadc->cal_data[AB8500_CAL_BTEMP].otp_calib_hi = (u16)btemp_high;  in ab8500_gpadc_read_calibration_data()
861 		gpadc->cal_data[AB8500_CAL_BTEMP].otp_calib_lo = (u16)btemp_low;  in ab8500_gpadc_read_calibration_data()
863 		gpadc->cal_data[AB8500_CAL_BTEMP].gain =  in ab8500_gpadc_read_calibration_data()
864 			AB8500_GPADC_CALIB_SCALE * (1300 - 21) / (btemp_high - btemp_low);  in ab8500_gpadc_read_calibration_data()
865 		gpadc->cal_data[AB8500_CAL_BTEMP].offset = AB8500_GPADC_CALIB_SCALE * 1300 -  in ab8500_gpadc_read_calibration_data()
866 			(AB8500_GPADC_CALIB_SCALE * (1300 - 21) / (btemp_high - btemp_low))  in ab8500_gpadc_read_calibration_data()
869 		gpadc->cal_data[AB8500_CAL_BTEMP].gain = 0;  in ab8500_gpadc_read_calibration_data()
877 		gpadc->cal_data[AB8500_CAL_VBAT].otp_calib_hi = (u16)vbat_high;  in ab8500_gpadc_read_calibration_data()
878 		gpadc->cal_data[AB8500_CAL_VBAT].otp_calib_lo = (u16)vbat_low;  in ab8500_gpadc_read_calibration_data()
880 		gpadc->cal_data[AB8500_CAL_VBAT].gain = AB8500_GPADC_CALIB_SCALE *  in ab8500_gpadc_read_calibration_data()
881 			(4700 - 2380) /	(vbat_high - vbat_low);  in ab8500_gpadc_read_calibration_data()
882 		gpadc->cal_data[AB8500_CAL_VBAT].offset = AB8500_GPADC_CALIB_SCALE * 4700 -  in ab8500_gpadc_read_calibration_data()
883 			(AB8500_GPADC_CALIB_SCALE * (4700 - 2380) /  in ab8500_gpadc_read_calibration_data()
884 			(vbat_high - vbat_low)) * vbat_high;  in ab8500_gpadc_read_calibration_data()
886 		gpadc->cal_data[AB8500_CAL_VBAT].gain = 0;  in ab8500_gpadc_read_calibration_data()
899 	ch = ab8500_gpadc_get_channel(gpadc, chan->address);  in ab8500_gpadc_read_raw()
901 		dev_err(gpadc->dev, "no such channel %lu\n",  in ab8500_gpadc_read_raw()
902 			chan->address);  in ab8500_gpadc_read_raw()
903 		return -EINVAL;  in ab8500_gpadc_read_raw()
916 		processed = ab8500_gpadc_ad_to_voltage(gpadc, ch->id, raw_val);  in ab8500_gpadc_read_raw()
925 	return -EINVAL;  in ab8500_gpadc_read_raw()
933 	for (i = 0; i < indio_dev->num_channels; i++)  in ab8500_gpadc_of_xlate()
934 		if (indio_dev->channels[i].channel == iiospec->args[0])  in ab8500_gpadc_of_xlate()
937 	return -EINVAL;  in ab8500_gpadc_of_xlate()
951 	regulator_disable(gpadc->vddadc);  in ab8500_gpadc_runtime_suspend()
962 	ret = regulator_enable(gpadc->vddadc);  in ab8500_gpadc_runtime_resume()
971  * ab8500_gpadc_parse_channel() - process devicetree channel configuration
985 	const char *name = np->name;  in ab8500_gpadc_parse_channel()
996 		return -EINVAL;  in ab8500_gpadc_parse_channel()
999 	iio_chan->channel = chan;  in ab8500_gpadc_parse_channel()
1000 	iio_chan->datasheet_name = name;  in ab8500_gpadc_parse_channel()
1001 	iio_chan->indexed = 1;  in ab8500_gpadc_parse_channel()
1002 	iio_chan->address = chan;  in ab8500_gpadc_parse_channel()
1003 	iio_chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |  in ab8500_gpadc_parse_channel()
1008 		iio_chan->type = IIO_CURRENT;  in ab8500_gpadc_parse_channel()
1010 		iio_chan->type = IIO_VOLTAGE;  in ab8500_gpadc_parse_channel()
1012 	ch->id = chan;  in ab8500_gpadc_parse_channel()
1015 	ch->avg_sample = 16;  in ab8500_gpadc_parse_channel()
1016 	ch->hardware_control = false;  in ab8500_gpadc_parse_channel()
1017 	ch->falling_edge = false;  in ab8500_gpadc_parse_channel()
1018 	ch->trig_timer = 0;  in ab8500_gpadc_parse_channel()
1024  * ab8500_gpadc_parse_channels() - Parse the GPADC channels from DT
1043 		dev_err(gpadc->dev, "no channel children\n");  in ab8500_gpadc_parse_channels()
1044 		return -ENODEV;  in ab8500_gpadc_parse_channels()
1046 	dev_info(gpadc->dev, "found %d ADC channels\n", nchans);  in ab8500_gpadc_parse_channels()
1048 	iio_chans = devm_kcalloc(gpadc->dev, nchans,  in ab8500_gpadc_parse_channels()
1051 		return -ENOMEM;  in ab8500_gpadc_parse_channels()
1053 	gpadc->chans = devm_kcalloc(gpadc->dev, nchans,  in ab8500_gpadc_parse_channels()
1054 				    sizeof(*gpadc->chans), GFP_KERNEL);  in ab8500_gpadc_parse_channels()
1055 	if (!gpadc->chans)  in ab8500_gpadc_parse_channels()
1056 		return -ENOMEM;  in ab8500_gpadc_parse_channels()
1063 		ch = &gpadc->chans[i];  in ab8500_gpadc_parse_channels()
1066 		ret = ab8500_gpadc_parse_channel(gpadc->dev, child, ch,  in ab8500_gpadc_parse_channels()
1074 	gpadc->nchans = nchans;  in ab8500_gpadc_parse_channels()
1085 	struct device *dev = &pdev->dev;  in ab8500_gpadc_probe()
1086 	struct device_node *np = pdev->dev.of_node;  in ab8500_gpadc_probe()
1093 		return -ENOMEM;  in ab8500_gpadc_probe()
1098 	gpadc->dev = dev;  in ab8500_gpadc_probe()
1099 	gpadc->ab8500 = dev_get_drvdata(dev->parent);  in ab8500_gpadc_probe()
1105 	gpadc->irq_sw = platform_get_irq_byname(pdev, "SW_CONV_END");  in ab8500_gpadc_probe()
1106 	if (gpadc->irq_sw < 0) {  in ab8500_gpadc_probe()
1108 		return gpadc->irq_sw;  in ab8500_gpadc_probe()
1111 	gpadc->irq_hw = platform_get_irq_byname(pdev, "HW_CONV_END");  in ab8500_gpadc_probe()
1112 	if (gpadc->irq_hw < 0) {  in ab8500_gpadc_probe()
1114 		return gpadc->irq_hw;  in ab8500_gpadc_probe()
1118 	init_completion(&gpadc->complete);  in ab8500_gpadc_probe()
1121 	ret = devm_request_threaded_irq(dev, gpadc->irq_sw, NULL,  in ab8500_gpadc_probe()
1123 		"ab8500-gpadc-sw", gpadc);  in ab8500_gpadc_probe()
1127 			gpadc->irq_sw);  in ab8500_gpadc_probe()
1131 	ret = devm_request_threaded_irq(dev, gpadc->irq_hw, NULL,  in ab8500_gpadc_probe()
1133 		"ab8500-gpadc-hw", gpadc);  in ab8500_gpadc_probe()
1137 			gpadc->irq_hw);  in ab8500_gpadc_probe()
1142 	gpadc->vddadc = devm_regulator_get(dev, "vddadc");  in ab8500_gpadc_probe()
1143 	if (IS_ERR(gpadc->vddadc)) {  in ab8500_gpadc_probe()
1144 		ret = PTR_ERR(gpadc->vddadc);  in ab8500_gpadc_probe()
1149 	ret = regulator_enable(gpadc->vddadc);  in ab8500_gpadc_probe()
1166 	indio_dev->name = "ab8500-gpadc";  in ab8500_gpadc_probe()
1167 	indio_dev->modes = INDIO_DIRECT_MODE;  in ab8500_gpadc_probe()
1168 	indio_dev->info = &ab8500_gpadc_info;  in ab8500_gpadc_probe()
1169 	indio_dev->channels = iio_chans;  in ab8500_gpadc_probe()
1170 	indio_dev->num_channels = n_iio_chans;  in ab8500_gpadc_probe()
1182 	regulator_disable(gpadc->vddadc);  in ab8500_gpadc_probe()
1192 	pm_runtime_get_sync(gpadc->dev);  in ab8500_gpadc_remove()
1193 	pm_runtime_put_noidle(gpadc->dev);  in ab8500_gpadc_remove()
1194 	pm_runtime_disable(gpadc->dev);  in ab8500_gpadc_remove()
1195 	regulator_disable(gpadc->vddadc);  in ab8500_gpadc_remove()
1212 		.name = "ab8500-gpadc",