Lines Matching refs:vadc
200 static int vadc_read(struct vadc_priv *vadc, u16 offset, u8 *data) in vadc_read() argument
202 return regmap_bulk_read(vadc->regmap, vadc->base + offset, data, 1); in vadc_read()
205 static int vadc_write(struct vadc_priv *vadc, u16 offset, u8 data) in vadc_write() argument
207 return regmap_write(vadc->regmap, vadc->base + offset, data); in vadc_write()
210 static int vadc_reset(struct vadc_priv *vadc) in vadc_reset() argument
215 ret = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA); in vadc_reset()
219 ret = vadc_read(vadc, VADC_PERH_RESET_CTL3, &data); in vadc_reset()
223 ret = vadc_write(vadc, VADC_ACCESS, VADC_ACCESS_DATA); in vadc_reset()
229 return vadc_write(vadc, VADC_PERH_RESET_CTL3, data); in vadc_reset()
232 static int vadc_set_state(struct vadc_priv *vadc, bool state) in vadc_set_state() argument
234 return vadc_write(vadc, VADC_EN_CTL1, state ? VADC_EN_CTL1_SET : 0); in vadc_set_state()
237 static void vadc_show_status(struct vadc_priv *vadc) in vadc_show_status() argument
242 ret = vadc_read(vadc, VADC_MODE_CTL, &mode); in vadc_show_status()
246 ret = vadc_read(vadc, VADC_ADC_DIG_PARAM, &dig); in vadc_show_status()
250 ret = vadc_read(vadc, VADC_ADC_CH_SEL_CTL, &chan); in vadc_show_status()
254 ret = vadc_read(vadc, VADC_CONV_REQ, &req); in vadc_show_status()
258 ret = vadc_read(vadc, VADC_STATUS1, &sta1); in vadc_show_status()
262 ret = vadc_read(vadc, VADC_EN_CTL1, &en); in vadc_show_status()
266 dev_err(vadc->dev, in vadc_show_status()
271 static int vadc_configure(struct vadc_priv *vadc, in vadc_configure() argument
280 ret = vadc_write(vadc, VADC_MODE_CTL, mode_ctrl); in vadc_configure()
285 ret = vadc_write(vadc, VADC_ADC_CH_SEL_CTL, prop->channel); in vadc_configure()
291 ret = vadc_write(vadc, VADC_ADC_DIG_PARAM, decimation); in vadc_configure()
296 ret = vadc_write(vadc, VADC_HW_SETTLE_DELAY, prop->hw_settle_time); in vadc_configure()
300 ret = vadc_write(vadc, VADC_FAST_AVG_CTL, prop->avg_samples); in vadc_configure()
305 ret = vadc_write(vadc, VADC_FAST_AVG_EN, VADC_FAST_AVG_EN_SET); in vadc_configure()
307 ret = vadc_write(vadc, VADC_FAST_AVG_EN, 0); in vadc_configure()
312 static int vadc_poll_wait_eoc(struct vadc_priv *vadc, unsigned int interval_us) in vadc_poll_wait_eoc() argument
321 ret = vadc_read(vadc, VADC_STATUS1, &sta1); in vadc_poll_wait_eoc()
332 vadc_show_status(vadc); in vadc_poll_wait_eoc()
337 static int vadc_read_result(struct vadc_priv *vadc, u16 *data) in vadc_read_result() argument
341 ret = regmap_bulk_read(vadc->regmap, vadc->base + VADC_DATA, data, 2); in vadc_read_result()
350 static struct vadc_channel_prop *vadc_get_channel(struct vadc_priv *vadc, in vadc_get_channel() argument
355 for (i = 0; i < vadc->nchannels; i++) in vadc_get_channel()
356 if (vadc->chan_props[i].channel == num) in vadc_get_channel()
357 return &vadc->chan_props[i]; in vadc_get_channel()
359 dev_dbg(vadc->dev, "no such channel %02x\n", num); in vadc_get_channel()
364 static int vadc_do_conversion(struct vadc_priv *vadc, in vadc_do_conversion() argument
370 mutex_lock(&vadc->lock); in vadc_do_conversion()
372 ret = vadc_configure(vadc, prop); in vadc_do_conversion()
376 if (!vadc->poll_eoc) in vadc_do_conversion()
377 reinit_completion(&vadc->complete); in vadc_do_conversion()
379 ret = vadc_set_state(vadc, true); in vadc_do_conversion()
383 ret = vadc_write(vadc, VADC_CONV_REQ, VADC_CONV_REQ_SET); in vadc_do_conversion()
389 if (vadc->poll_eoc) { in vadc_do_conversion()
390 ret = vadc_poll_wait_eoc(vadc, timeout); in vadc_do_conversion()
392 ret = wait_for_completion_timeout(&vadc->complete, timeout); in vadc_do_conversion()
399 ret = vadc_poll_wait_eoc(vadc, VADC_CONV_TIME_MIN_US); in vadc_do_conversion()
404 ret = vadc_read_result(vadc, data); in vadc_do_conversion()
407 vadc_set_state(vadc, false); in vadc_do_conversion()
409 dev_err(vadc->dev, "conversion failed\n"); in vadc_do_conversion()
411 mutex_unlock(&vadc->lock); in vadc_do_conversion()
415 static int vadc_measure_ref_points(struct vadc_priv *vadc) in vadc_measure_ref_points() argument
421 vadc->graph[VADC_CALIB_RATIOMETRIC].dx = VADC_RATIOMETRIC_RANGE_UV; in vadc_measure_ref_points()
422 vadc->graph[VADC_CALIB_ABSOLUTE].dx = VADC_ABSOLUTE_RANGE_UV; in vadc_measure_ref_points()
424 prop = vadc_get_channel(vadc, VADC_REF_1250MV); in vadc_measure_ref_points()
425 ret = vadc_do_conversion(vadc, prop, &read_1); in vadc_measure_ref_points()
430 prop = vadc_get_channel(vadc, VADC_SPARE1); in vadc_measure_ref_points()
432 prop = vadc_get_channel(vadc, VADC_REF_625MV); in vadc_measure_ref_points()
434 ret = vadc_do_conversion(vadc, prop, &read_2); in vadc_measure_ref_points()
443 vadc->graph[VADC_CALIB_ABSOLUTE].dy = read_1 - read_2; in vadc_measure_ref_points()
444 vadc->graph[VADC_CALIB_ABSOLUTE].gnd = read_2; in vadc_measure_ref_points()
447 prop = vadc_get_channel(vadc, VADC_VDD_VADC); in vadc_measure_ref_points()
448 ret = vadc_do_conversion(vadc, prop, &read_1); in vadc_measure_ref_points()
452 prop = vadc_get_channel(vadc, VADC_GND_REF); in vadc_measure_ref_points()
453 ret = vadc_do_conversion(vadc, prop, &read_2); in vadc_measure_ref_points()
462 vadc->graph[VADC_CALIB_RATIOMETRIC].dy = read_1 - read_2; in vadc_measure_ref_points()
463 vadc->graph[VADC_CALIB_RATIOMETRIC].gnd = read_2; in vadc_measure_ref_points()
466 dev_err(vadc->dev, "measure reference points failed\n"); in vadc_measure_ref_points()
471 static s32 vadc_calibrate(struct vadc_priv *vadc, in vadc_calibrate() argument
477 voltage = adc_code - vadc->graph[prop->calibration].gnd; in vadc_calibrate()
478 voltage *= vadc->graph[prop->calibration].dx; in vadc_calibrate()
479 voltage = div64_s64(voltage, vadc->graph[prop->calibration].dy); in vadc_calibrate()
482 voltage += vadc->graph[prop->calibration].dx; in vadc_calibrate()
543 struct vadc_priv *vadc = iio_priv(indio_dev); in vadc_read_raw() local
550 prop = &vadc->chan_props[chan->address]; in vadc_read_raw()
551 ret = vadc_do_conversion(vadc, prop, &adc_code); in vadc_read_raw()
555 *val = vadc_calibrate(vadc, prop, adc_code); in vadc_read_raw()
562 prop = &vadc->chan_props[chan->address]; in vadc_read_raw()
563 ret = vadc_do_conversion(vadc, prop, &adc_code); in vadc_read_raw()
567 *val = vadc_calibrate(vadc, prop, adc_code); in vadc_read_raw()
584 struct vadc_priv *vadc = iio_priv(indio_dev); in vadc_of_xlate() local
587 for (i = 0; i < vadc->nchannels; i++) in vadc_of_xlate()
588 if (vadc->iio_chans[i].channel == iiospec->args[0]) in vadc_of_xlate()
815 static int vadc_get_dt_data(struct vadc_priv *vadc, struct device_node *node) in vadc_get_dt_data() argument
824 vadc->nchannels = of_get_available_child_count(node); in vadc_get_dt_data()
825 if (!vadc->nchannels) in vadc_get_dt_data()
828 vadc->iio_chans = devm_kcalloc(vadc->dev, vadc->nchannels, in vadc_get_dt_data()
829 sizeof(*vadc->iio_chans), GFP_KERNEL); in vadc_get_dt_data()
830 if (!vadc->iio_chans) in vadc_get_dt_data()
833 vadc->chan_props = devm_kcalloc(vadc->dev, vadc->nchannels, in vadc_get_dt_data()
834 sizeof(*vadc->chan_props), GFP_KERNEL); in vadc_get_dt_data()
835 if (!vadc->chan_props) in vadc_get_dt_data()
838 iio_chan = vadc->iio_chans; in vadc_get_dt_data()
841 ret = vadc_get_dt_channel_data(vadc->dev, &prop, child); in vadc_get_dt_data()
845 vadc->chan_props[index] = prop; in vadc_get_dt_data()
860 if (!vadc_get_channel(vadc, VADC_REF_1250MV)) { in vadc_get_dt_data()
861 dev_err(vadc->dev, "Please define 1.25V channel\n"); in vadc_get_dt_data()
865 if (!vadc_get_channel(vadc, VADC_REF_625MV)) { in vadc_get_dt_data()
866 dev_err(vadc->dev, "Please define 0.625V channel\n"); in vadc_get_dt_data()
870 if (!vadc_get_channel(vadc, VADC_VDD_VADC)) { in vadc_get_dt_data()
871 dev_err(vadc->dev, "Please define VDD channel\n"); in vadc_get_dt_data()
875 if (!vadc_get_channel(vadc, VADC_GND_REF)) { in vadc_get_dt_data()
876 dev_err(vadc->dev, "Please define GND channel\n"); in vadc_get_dt_data()
885 struct vadc_priv *vadc = dev_id; in vadc_isr() local
887 complete(&vadc->complete); in vadc_isr()
892 static int vadc_check_revision(struct vadc_priv *vadc) in vadc_check_revision() argument
897 ret = vadc_read(vadc, VADC_PERPH_TYPE, &val); in vadc_check_revision()
902 dev_err(vadc->dev, "%d is not ADC\n", val); in vadc_check_revision()
906 ret = vadc_read(vadc, VADC_PERPH_SUBTYPE, &val); in vadc_check_revision()
911 dev_err(vadc->dev, "%d is not VADC\n", val); in vadc_check_revision()
915 ret = vadc_read(vadc, VADC_REVISION2, &val); in vadc_check_revision()
920 dev_err(vadc->dev, "revision %d not supported\n", val); in vadc_check_revision()
932 struct vadc_priv *vadc; in vadc_probe() local
945 indio_dev = devm_iio_device_alloc(dev, sizeof(*vadc)); in vadc_probe()
949 vadc = iio_priv(indio_dev); in vadc_probe()
950 vadc->regmap = regmap; in vadc_probe()
951 vadc->dev = dev; in vadc_probe()
952 vadc->base = reg; in vadc_probe()
953 vadc->are_ref_measured = false; in vadc_probe()
954 init_completion(&vadc->complete); in vadc_probe()
955 mutex_init(&vadc->lock); in vadc_probe()
957 ret = vadc_check_revision(vadc); in vadc_probe()
961 ret = vadc_get_dt_data(vadc, node); in vadc_probe()
969 vadc->poll_eoc = true; in vadc_probe()
972 "spmi-vadc", vadc); in vadc_probe()
977 ret = vadc_reset(vadc); in vadc_probe()
983 ret = vadc_measure_ref_points(vadc); in vadc_probe()
992 indio_dev->channels = vadc->iio_chans; in vadc_probe()
993 indio_dev->num_channels = vadc->nchannels; in vadc_probe()