43 /* GPADC register offsets and bit definitions */
46 /* GPADC control register 1 bits */
62  * GPADC control register 2 and 3 bits
145 /* GPADC constants from AB8500 spec, UM0836 */
162 /* GPADC constants from AB8540 spec */
207  * struct ab8500_gpadc_chan_info - per-channel GPADC info
230  * struct ab8500_gpadc - AB8500 GPADC device information
236  * the completion of an gpadc conversion cycle
238  * @irq_sw: interrupt number that is used by gpadc for software ADC conversion
239  * @irq_hw: interrupt number that is used by gpadc for hardware ADC conversion
255 ab8500_gpadc_get_channel(struct ab8500_gpadc *gpadc, u8 chan)  in ab8500_gpadc_get_channel()  argument
260 	for (i = 0; i < gpadc->nchans; i++) {  in ab8500_gpadc_get_channel()
261 		ch = &gpadc->chans[i];  in ab8500_gpadc_get_channel()
265 	if (i == gpadc->nchans)  in ab8500_gpadc_get_channel()
273  * @gpadc: GPADC instance
277 static int ab8500_gpadc_ad_to_voltage(struct ab8500_gpadc *gpadc,  in ab8500_gpadc_ad_to_voltage()  argument
286 		if (!gpadc->cal_data[AB8500_CAL_VMAIN].gain) {  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()
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()
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()
362 		if (!gpadc->cal_data[AB8500_CAL_IBAT].gain) {  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()
386 static int ab8500_gpadc_read(struct ab8500_gpadc *gpadc,  in ab8500_gpadc_read()  argument
401 	if (!gpadc)  in ab8500_gpadc_read()
405 	if ((gpadc->irq_sw <= 0) && !ch->hardware_control)  in ab8500_gpadc_read()
407 	if ((gpadc->irq_hw <= 0) && ch->hardware_control)  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()
429 	/* Enable GPADC */  in ab8500_gpadc_read()
449 		ret = abx500_set_register_interruptible(gpadc->dev,  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()
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()
507 		ret = abx500_set_register_interruptible(gpadc->dev,  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()
538 			"timeout didn't receive GPADC conv interrupt\n");  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()
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()
601 	/* Disable GPADC */  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()
617 	 * It has shown to be needed to turn off the GPADC if an error occurs,  in ab8500_gpadc_read()
619 	 * GPADC status register to go low. In V1.1 there wait_for_completion  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()
632  * ab8500_bm_gpadcconvend_handler() - isr for gpadc conversion completion
636  * This is a interrupt service routine for gpadc conversion completion.
637  * Notifies the gpadc completion is completed and the converted raw value
643 	struct ab8500_gpadc *gpadc = data;  in ab8500_bm_gpadcconvend_handler()  local
645 	complete(&gpadc->complete);  in ab8500_bm_gpadcconvend_handler()
666 static void ab8500_gpadc_read_calibration_data(struct ab8500_gpadc *gpadc)  in ab8500_gpadc_read_calibration_data()  argument
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()
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()
775 			gpadc->cal_data[AB8500_CAL_VMAIN].offset = AB8500_GPADC_CALIB_SCALE *  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()
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()
846 			gpadc->cal_data[AB8500_CAL_VMAIN].offset = AB8500_GPADC_CALIB_SCALE *  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()
865 		gpadc->cal_data[AB8500_CAL_BTEMP].offset = AB8500_GPADC_CALIB_SCALE * 1300 -  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()
882 		gpadc->cal_data[AB8500_CAL_VBAT].offset = AB8500_GPADC_CALIB_SCALE * 4700 -  in ab8500_gpadc_read_calibration_data()
886 		gpadc->cal_data[AB8500_CAL_VBAT].gain = 0;  in ab8500_gpadc_read_calibration_data()
894 	struct ab8500_gpadc *gpadc = iio_priv(indio_dev);  in ab8500_gpadc_read_raw()  local
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()
906 	raw_val = ab8500_gpadc_read(gpadc, ch, NULL);  in ab8500_gpadc_read_raw()
916 		processed = ab8500_gpadc_ad_to_voltage(gpadc, ch->id, raw_val);  in ab8500_gpadc_read_raw()
948 	struct ab8500_gpadc *gpadc = iio_priv(indio_dev);  in ab8500_gpadc_runtime_suspend()  local
950 	regulator_disable(gpadc->vddadc);  in ab8500_gpadc_runtime_suspend()
958 	struct ab8500_gpadc *gpadc = iio_priv(indio_dev);  in ab8500_gpadc_runtime_resume()  local
961 	ret = regulator_enable(gpadc->vddadc);  in ab8500_gpadc_runtime_resume()
976  * and define usage for things like AUX GPADC inputs more precisely.
1022  * ab8500_gpadc_parse_channels() - Parse the GPADC channels from DT
1023  * @gpadc: the GPADC to configure the channels for
1027 static int ab8500_gpadc_parse_channels(struct ab8500_gpadc *gpadc,  in ab8500_gpadc_parse_channels()  argument
1036 	nchans = device_get_child_node_count(gpadc->dev);  in ab8500_gpadc_parse_channels()
1038 		dev_err(gpadc->dev, "no channel children\n");  in ab8500_gpadc_parse_channels()
1041 	dev_info(gpadc->dev, "found %d ADC channels\n", nchans);  in ab8500_gpadc_parse_channels()
1043 	iio_chans = devm_kcalloc(gpadc->dev, nchans,  in ab8500_gpadc_parse_channels()
1048 	gpadc->chans = devm_kcalloc(gpadc->dev, nchans,  in ab8500_gpadc_parse_channels()
1049 				    sizeof(*gpadc->chans), GFP_KERNEL);  in ab8500_gpadc_parse_channels()
1050 	if (!gpadc->chans)  in ab8500_gpadc_parse_channels()
1054 	device_for_each_child_node_scoped(gpadc->dev, child) {  in ab8500_gpadc_parse_channels()
1058 		ch = &gpadc->chans[i];  in ab8500_gpadc_parse_channels()
1061 		ret = ab8500_gpadc_parse_channel(gpadc->dev, child, ch,  in ab8500_gpadc_parse_channels()
1068 	gpadc->nchans = nchans;  in ab8500_gpadc_parse_channels()
1077 	struct ab8500_gpadc *gpadc;  in ab8500_gpadc_probe()  local
1084 	indio_dev = devm_iio_device_alloc(dev, sizeof(*gpadc));  in ab8500_gpadc_probe()
1089 	gpadc = iio_priv(indio_dev);  in ab8500_gpadc_probe()
1091 	gpadc->dev = dev;  in ab8500_gpadc_probe()
1092 	gpadc->ab8500 = dev_get_drvdata(dev->parent);  in ab8500_gpadc_probe()
1094 	ret = ab8500_gpadc_parse_channels(gpadc, &iio_chans, &n_iio_chans);  in ab8500_gpadc_probe()
1098 	gpadc->irq_sw = platform_get_irq_byname(pdev, "SW_CONV_END");  in ab8500_gpadc_probe()
1099 	if (gpadc->irq_sw < 0)  in ab8500_gpadc_probe()
1100 		return gpadc->irq_sw;  in ab8500_gpadc_probe()
1102 	if (is_ab8500(gpadc->ab8500)) {  in ab8500_gpadc_probe()
1103 		gpadc->irq_hw = platform_get_irq_byname(pdev, "HW_CONV_END");  in ab8500_gpadc_probe()
1104 		if (gpadc->irq_hw < 0)  in ab8500_gpadc_probe()
1105 			return gpadc->irq_hw;  in ab8500_gpadc_probe()
1107 		gpadc->irq_hw = 0;  in ab8500_gpadc_probe()
1111 	init_completion(&gpadc->complete);  in ab8500_gpadc_probe()
1114 	ret = devm_request_threaded_irq(dev, gpadc->irq_sw, NULL,  in ab8500_gpadc_probe()
1116 		"ab8500-gpadc-sw", gpadc);  in ab8500_gpadc_probe()
1120 			gpadc->irq_sw);  in ab8500_gpadc_probe()
1124 	if (gpadc->irq_hw) {  in ab8500_gpadc_probe()
1125 		ret = devm_request_threaded_irq(dev, gpadc->irq_hw, NULL,  in ab8500_gpadc_probe()
1127 			"ab8500-gpadc-hw", gpadc);  in ab8500_gpadc_probe()
1131 				gpadc->irq_hw);  in ab8500_gpadc_probe()
1136 	/* The VTVout LDO used to power the AB8500 GPADC */  in ab8500_gpadc_probe()
1137 	gpadc->vddadc = devm_regulator_get(dev, "vddadc");  in ab8500_gpadc_probe()
1138 	if (IS_ERR(gpadc->vddadc))  in ab8500_gpadc_probe()
1139 		return dev_err_probe(dev, PTR_ERR(gpadc->vddadc),  in ab8500_gpadc_probe()
1142 	ret = regulator_enable(gpadc->vddadc);  in ab8500_gpadc_probe()
1155 	ab8500_gpadc_read_calibration_data(gpadc);  in ab8500_gpadc_probe()
1159 	indio_dev->name = "ab8500-gpadc";  in ab8500_gpadc_probe()
1175 	regulator_disable(gpadc->vddadc);  in ab8500_gpadc_probe()
1183 	struct ab8500_gpadc *gpadc = iio_priv(indio_dev);  in ab8500_gpadc_remove()  local
1185 	pm_runtime_get_sync(gpadc->dev);  in ab8500_gpadc_remove()
1186 	pm_runtime_put_noidle(gpadc->dev);  in ab8500_gpadc_remove()
1187 	pm_runtime_disable(gpadc->dev);  in ab8500_gpadc_remove()
1188 	regulator_disable(gpadc->vddadc);  in ab8500_gpadc_remove()
1199 		.name = "ab8500-gpadc",