Lines Matching refs:adc
419 struct pm8xxx_xoadc *adc = iio_priv(indio_dev); in pm8xxx_eoc_irq() local
421 complete(&adc->complete); in pm8xxx_eoc_irq()
427 pm8xxx_get_channel(struct pm8xxx_xoadc *adc, u8 chan) in pm8xxx_get_channel() argument
431 for (i = 0; i < adc->nchans; i++) { in pm8xxx_get_channel()
432 struct pm8xxx_chan_info *ch = &adc->chans[i]; in pm8xxx_get_channel()
439 static int pm8xxx_read_channel_rsv(struct pm8xxx_xoadc *adc, in pm8xxx_read_channel_rsv() argument
449 dev_dbg(adc->dev, "read channel \"%s\", amux %d, prescale/mux: %d, rsv %d\n", in pm8xxx_read_channel_rsv()
452 mutex_lock(&adc->lock); in pm8xxx_read_channel_rsv()
457 ret = regmap_write(adc->map, ADC_ARB_USRP_AMUX_CNTRL, val); in pm8xxx_read_channel_rsv()
464 if (adc->variant->broken_ratiometric && !force_ratiometric) { in pm8xxx_read_channel_rsv()
494 ret = regmap_update_bits(adc->map, in pm8xxx_read_channel_rsv()
501 ret = regmap_write(adc->map, ADC_ARB_USRP_ANA_PARAM, in pm8xxx_read_channel_rsv()
507 ret = regmap_write(adc->map, ADC_ARB_USRP_DIG_PARAM, in pm8xxx_read_channel_rsv()
514 ret = regmap_write(adc->map, ADC_ARB_USRP_ANA_PARAM, in pm8xxx_read_channel_rsv()
520 ret = regmap_write(adc->map, ADC_ARB_USRP_CNTRL, in pm8xxx_read_channel_rsv()
524 ret = regmap_write(adc->map, ADC_ARB_USRP_CNTRL, in pm8xxx_read_channel_rsv()
531 reinit_completion(&adc->complete); in pm8xxx_read_channel_rsv()
532 ret = regmap_write(adc->map, ADC_ARB_USRP_CNTRL, in pm8xxx_read_channel_rsv()
539 ret = wait_for_completion_timeout(&adc->complete, in pm8xxx_read_channel_rsv()
542 dev_err(adc->dev, "conversion timed out\n"); in pm8xxx_read_channel_rsv()
547 ret = regmap_read(adc->map, ADC_ARB_USRP_DATA0, &val); in pm8xxx_read_channel_rsv()
551 ret = regmap_read(adc->map, ADC_ARB_USRP_DATA1, &val); in pm8xxx_read_channel_rsv()
558 ret = regmap_write(adc->map, ADC_ARB_USRP_CNTRL, 0); in pm8xxx_read_channel_rsv()
561 ret = regmap_write(adc->map, ADC_ARB_USRP_CNTRL, 0); in pm8xxx_read_channel_rsv()
566 mutex_unlock(&adc->lock); in pm8xxx_read_channel_rsv()
570 static int pm8xxx_read_channel(struct pm8xxx_xoadc *adc, in pm8xxx_read_channel() argument
579 return pm8xxx_read_channel_rsv(adc, ch, 0xff, adc_code, false); in pm8xxx_read_channel()
582 static int pm8xxx_calibrate_device(struct pm8xxx_xoadc *adc) in pm8xxx_calibrate_device() argument
591 adc->graph[VADC_CALIB_ABSOLUTE].dx = VADC_ABSOLUTE_RANGE_UV; in pm8xxx_calibrate_device()
592 adc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE; in pm8xxx_calibrate_device()
595 ch = pm8xxx_get_channel(adc, PM8XXX_CHANNEL_125V); in pm8xxx_calibrate_device()
598 ret = pm8xxx_read_channel(adc, ch, &read_1250v); in pm8xxx_calibrate_device()
600 dev_err(adc->dev, "could not read 1.25V reference channel\n"); in pm8xxx_calibrate_device()
603 ch = pm8xxx_get_channel(adc, PM8XXX_CHANNEL_INTERNAL); in pm8xxx_calibrate_device()
606 ret = pm8xxx_read_channel(adc, ch, &read_0625v); in pm8xxx_calibrate_device()
608 dev_err(adc->dev, "could not read 0.625V reference channel\n"); in pm8xxx_calibrate_device()
612 dev_err(adc->dev, "read same ADC code for 1.25V and 0.625V\n"); in pm8xxx_calibrate_device()
616 adc->graph[VADC_CALIB_ABSOLUTE].dy = read_1250v - read_0625v; in pm8xxx_calibrate_device()
617 adc->graph[VADC_CALIB_ABSOLUTE].gnd = read_0625v; in pm8xxx_calibrate_device()
619 dev_info(adc->dev, "absolute calibration dx = %d uV, dy = %d units\n", in pm8xxx_calibrate_device()
620 VADC_ABSOLUTE_RANGE_UV, adc->graph[VADC_CALIB_ABSOLUTE].dy); in pm8xxx_calibrate_device()
623 ch = pm8xxx_get_channel(adc, PM8XXX_CHANNEL_MUXOFF); in pm8xxx_calibrate_device()
626 ret = pm8xxx_read_channel_rsv(adc, ch, AMUX_RSV5, in pm8xxx_calibrate_device()
629 dev_err(adc->dev, "could not read MUXOFF reference channel\n"); in pm8xxx_calibrate_device()
632 ret = pm8xxx_read_channel_rsv(adc, ch, AMUX_RSV4, in pm8xxx_calibrate_device()
635 dev_err(adc->dev, "could not read MUXOFF reference channel\n"); in pm8xxx_calibrate_device()
638 adc->graph[VADC_CALIB_RATIOMETRIC].dy = in pm8xxx_calibrate_device()
640 adc->graph[VADC_CALIB_RATIOMETRIC].gnd = read_nomux_rsv4; in pm8xxx_calibrate_device()
642 dev_info(adc->dev, "ratiometric calibration dx = %d, dy = %d units\n", in pm8xxx_calibrate_device()
644 adc->graph[VADC_CALIB_RATIOMETRIC].dy); in pm8xxx_calibrate_device()
653 struct pm8xxx_xoadc *adc = iio_priv(indio_dev); in pm8xxx_read_raw() local
660 ch = pm8xxx_get_channel(adc, chan->address); in pm8xxx_read_raw()
662 dev_err(adc->dev, "no such channel %lu\n", in pm8xxx_read_raw()
666 ret = pm8xxx_read_channel(adc, ch, &adc_code); in pm8xxx_read_raw()
671 &adc->graph[ch->calibration], in pm8xxx_read_raw()
680 ch = pm8xxx_get_channel(adc, chan->address); in pm8xxx_read_raw()
682 dev_err(adc->dev, "no such channel %lu\n", in pm8xxx_read_raw()
686 ret = pm8xxx_read_channel(adc, ch, &adc_code); in pm8xxx_read_raw()
700 struct pm8xxx_xoadc *adc = iio_priv(indio_dev); in pm8xxx_fwnode_xlate() local
721 for (i = 0; i < adc->nchans; i++) in pm8xxx_fwnode_xlate()
722 if (adc->chans[i].hwchan->pre_scale_mux == pre_scale_mux && in pm8xxx_fwnode_xlate()
723 adc->chans[i].hwchan->amux_channel == amux_channel) in pm8xxx_fwnode_xlate()
823 static int pm8xxx_xoadc_parse_channels(struct pm8xxx_xoadc *adc) in pm8xxx_xoadc_parse_channels() argument
830 adc->nchans = device_get_child_node_count(adc->dev); in pm8xxx_xoadc_parse_channels()
831 if (!adc->nchans) { in pm8xxx_xoadc_parse_channels()
832 dev_err(adc->dev, "no channel children\n"); in pm8xxx_xoadc_parse_channels()
835 dev_dbg(adc->dev, "found %d ADC channels\n", adc->nchans); in pm8xxx_xoadc_parse_channels()
837 adc->iio_chans = devm_kcalloc(adc->dev, adc->nchans, in pm8xxx_xoadc_parse_channels()
838 sizeof(*adc->iio_chans), GFP_KERNEL); in pm8xxx_xoadc_parse_channels()
839 if (!adc->iio_chans) in pm8xxx_xoadc_parse_channels()
842 adc->chans = devm_kcalloc(adc->dev, adc->nchans, in pm8xxx_xoadc_parse_channels()
843 sizeof(*adc->chans), GFP_KERNEL); in pm8xxx_xoadc_parse_channels()
844 if (!adc->chans) in pm8xxx_xoadc_parse_channels()
848 device_for_each_child_node(adc->dev, child) { in pm8xxx_xoadc_parse_channels()
849 ch = &adc->chans[i]; in pm8xxx_xoadc_parse_channels()
850 ret = pm8xxx_xoadc_parse_channel(adc->dev, child, in pm8xxx_xoadc_parse_channels()
851 adc->variant->channels, in pm8xxx_xoadc_parse_channels()
852 &adc->iio_chans[i], in pm8xxx_xoadc_parse_channels()
862 ch = pm8xxx_get_channel(adc, PM8XXX_CHANNEL_125V); in pm8xxx_xoadc_parse_channels()
864 dev_err(adc->dev, "missing 1.25V reference channel\n"); in pm8xxx_xoadc_parse_channels()
867 ch = pm8xxx_get_channel(adc, PM8XXX_CHANNEL_INTERNAL); in pm8xxx_xoadc_parse_channels()
869 dev_err(adc->dev, "missing 0.625V reference channel\n"); in pm8xxx_xoadc_parse_channels()
872 ch = pm8xxx_get_channel(adc, PM8XXX_CHANNEL_MUXOFF); in pm8xxx_xoadc_parse_channels()
874 dev_err(adc->dev, "missing MUXOFF reference channel\n"); in pm8xxx_xoadc_parse_channels()
884 struct pm8xxx_xoadc *adc; in pm8xxx_xoadc_probe() local
894 indio_dev = devm_iio_device_alloc(dev, sizeof(*adc)); in pm8xxx_xoadc_probe()
899 adc = iio_priv(indio_dev); in pm8xxx_xoadc_probe()
900 adc->dev = dev; in pm8xxx_xoadc_probe()
901 adc->variant = variant; in pm8xxx_xoadc_probe()
902 init_completion(&adc->complete); in pm8xxx_xoadc_probe()
903 mutex_init(&adc->lock); in pm8xxx_xoadc_probe()
905 ret = pm8xxx_xoadc_parse_channels(adc); in pm8xxx_xoadc_probe()
914 adc->map = map; in pm8xxx_xoadc_probe()
917 adc->vref = devm_regulator_get(dev, "xoadc-ref"); in pm8xxx_xoadc_probe()
918 if (IS_ERR(adc->vref)) in pm8xxx_xoadc_probe()
919 return dev_err_probe(dev, PTR_ERR(adc->vref), in pm8xxx_xoadc_probe()
921 ret = regulator_enable(adc->vref); in pm8xxx_xoadc_probe()
937 indio_dev->channels = adc->iio_chans; in pm8xxx_xoadc_probe()
938 indio_dev->num_channels = adc->nchans; in pm8xxx_xoadc_probe()
944 ret = pm8xxx_calibrate_device(adc); in pm8xxx_xoadc_probe()
955 regulator_disable(adc->vref); in pm8xxx_xoadc_probe()
963 struct pm8xxx_xoadc *adc = iio_priv(indio_dev); in pm8xxx_xoadc_remove() local
967 regulator_disable(adc->vref); in pm8xxx_xoadc_remove()