Lines Matching +full:at91sam9260 +full:- +full:adc
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Driver for the ADC present in the Atmel AT91 evaluation boards.
40 #define AT91_ADC_TSAMOD (3 << 0) /* ADC mode */
41 #define AT91_ADC_TSAMOD_ADC_ONLY_MODE (0 << 0) /* ADC Mode */
105 #define AT91_ADC_ACR_PENDETSENS (0x3 << 0) /* pull-up resistor */
139 (st->registers->channel_base + (ch * 4))
141 (readl_relaxed(st->reg_base + reg))
143 (writel_relaxed(val, st->reg_base + reg))
157 * struct at91_adc_reg_desc - Various informations relative to registers
163 * @mr_prescal_mask: Mask of the PRESCAL field in the adc MR register
164 * @mr_startup_mask: Mask of the STARTUP field in the adc MR register
183 /* Pen Detection input pull-up resistor, can be 0~3 */
220 * Following ADC channels are shared by touchscreen:
222 * CH0 -- Touch screen XP/UL
223 * CH1 -- Touch screen XM/UR
224 * CH2 -- Touch screen YP/LL
225 * CH3 -- Touch screen YM/Sense
226 * CH4 -- Touch screen LR(5-wire only)
248 struct iio_dev *idev = pf->indio_dev; in at91_adc_trigger_handler()
253 for (i = 0; i < idev->masklength; i++) { in at91_adc_trigger_handler()
254 if (!test_bit(i, idev->active_scan_mask)) in at91_adc_trigger_handler()
256 chan = idev->channels + i; in at91_adc_trigger_handler()
257 st->buffer[j] = at91_adc_readl(st, AT91_ADC_CHAN(st, chan->channel)); in at91_adc_trigger_handler()
261 iio_push_to_buffers_with_timestamp(idev, st->buffer, pf->timestamp); in at91_adc_trigger_handler()
263 iio_trigger_notify_done(idev->trig); in at91_adc_trigger_handler()
268 enable_irq(st->irq); in at91_adc_trigger_handler()
273 /* Handler for classic adc channel eoc trigger */
280 iio_trigger_poll(idev->trig); in handle_adc_eoc_trigger()
282 st->last_value = at91_adc_readl(st, AT91_ADC_CHAN(st, st->chnb)); in handle_adc_eoc_trigger()
285 st->done = true; in handle_adc_eoc_trigger()
286 wake_up_interruptible(&st->wq_data_avail); in handle_adc_eoc_trigger()
298 unsigned int xyz_mask_bits = st->res; in at91_ts_sample()
299 unsigned int xyz_mask = (1 << xyz_mask_bits) - 1; in at91_ts_sample()
302 /* x position = (x / xscale) * max, max = 2^MAX_POS_BITS - 1 */ in at91_ts_sample()
305 x = (xpos << MAX_POS_BITS) - xpos; in at91_ts_sample()
308 dev_err(&idev->dev, "Error: xscale == 0!\n"); in at91_ts_sample()
309 return -1; in at91_ts_sample()
313 /* y position = (y / yscale) * max, max = 2^MAX_POS_BITS - 1 */ in at91_ts_sample()
316 y = (ypos << MAX_POS_BITS) - ypos; in at91_ts_sample()
319 dev_err(&idev->dev, "Error: yscale == 0!\n"); in at91_ts_sample()
320 return -1; in at91_ts_sample()
330 pres = rxp * (x * factor / 1024) * (z2 * factor / z1 - factor) in at91_ts_sample()
333 pres = st->ts_pressure_threshold; /* no pen contacted */ in at91_ts_sample()
335 …dev_dbg(&idev->dev, "xpos = %d, xscale = %d, ypos = %d, yscale = %d, z1 = %d, z2 = %d, press = %d\… in at91_ts_sample()
338 if (pres < st->ts_pressure_threshold) { in at91_ts_sample()
339 dev_dbg(&idev->dev, "x = %d, y = %d, pressure = %d\n", in at91_ts_sample()
341 input_report_abs(st->ts_input, ABS_X, x); in at91_ts_sample()
342 input_report_abs(st->ts_input, ABS_Y, y); in at91_ts_sample()
343 input_report_abs(st->ts_input, ABS_PRESSURE, pres); in at91_ts_sample()
344 input_report_key(st->ts_input, BTN_TOUCH, 1); in at91_ts_sample()
345 input_sync(st->ts_input); in at91_ts_sample()
347 dev_dbg(&idev->dev, "pressure too low: not reporting\n"); in at91_ts_sample()
357 u32 status = at91_adc_readl(st, st->registers->status_register); in at91_adc_rl_interrupt()
361 if (status & GENMASK(st->num_channels - 1, 0)) in at91_adc_rl_interrupt()
374 at91_adc_writel(st, st->registers->trigger_register, in at91_adc_rl_interrupt()
376 AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val)); in at91_adc_rl_interrupt()
379 reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC; in at91_adc_rl_interrupt()
381 at91_adc_writel(st, st->registers->trigger_register, in at91_adc_rl_interrupt()
387 st->ts_bufferedmeasure = false; in at91_adc_rl_interrupt()
388 input_report_key(st->ts_input, BTN_TOUCH, 0); in at91_adc_rl_interrupt()
389 input_sync(st->ts_input); in at91_adc_rl_interrupt()
390 } else if (status & AT91_ADC_EOC(3) && st->ts_input) { in at91_adc_rl_interrupt()
392 if (st->ts_bufferedmeasure) { in at91_adc_rl_interrupt()
398 input_report_abs(st->ts_input, ABS_X, st->ts_prev_absx); in at91_adc_rl_interrupt()
399 input_report_abs(st->ts_input, ABS_Y, st->ts_prev_absy); in at91_adc_rl_interrupt()
400 input_report_key(st->ts_input, BTN_TOUCH, 1); in at91_adc_rl_interrupt()
401 input_sync(st->ts_input); in at91_adc_rl_interrupt()
403 st->ts_bufferedmeasure = true; in at91_adc_rl_interrupt()
406 st->ts_prev_absx = at91_adc_readl(st, AT91_ADC_CHAN(st, 3)) in at91_adc_rl_interrupt()
408 st->ts_prev_absx /= at91_adc_readl(st, AT91_ADC_CHAN(st, 2)); in at91_adc_rl_interrupt()
410 st->ts_prev_absy = at91_adc_readl(st, AT91_ADC_CHAN(st, 1)) in at91_adc_rl_interrupt()
412 st->ts_prev_absy /= at91_adc_readl(st, AT91_ADC_CHAN(st, 0)); in at91_adc_rl_interrupt()
422 u32 status = at91_adc_readl(st, st->registers->status_register); in at91_adc_9x5_interrupt()
428 if (status & GENMASK(st->num_channels - 1, 0)) in at91_adc_9x5_interrupt()
436 at91_adc_writel(st, st->registers->trigger_register, in at91_adc_9x5_interrupt()
438 AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val)); in at91_adc_9x5_interrupt()
440 at91_adc_writel(st, st->registers->trigger_register, 0); in at91_adc_9x5_interrupt()
445 input_report_key(st->ts_input, BTN_TOUCH, 0); in at91_adc_9x5_interrupt()
446 input_sync(st->ts_input); in at91_adc_9x5_interrupt()
473 /* If touchscreen is enable, then reserve the adc channels */ in at91_adc_channel_init()
474 if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE) in at91_adc_channel_init()
476 else if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_5WIRE) in at91_adc_channel_init()
480 st->channels_mask &= ~rsvd_mask; in at91_adc_channel_init()
482 idev->num_channels = bitmap_weight(&st->channels_mask, in at91_adc_channel_init()
483 st->num_channels) + 1; in at91_adc_channel_init()
485 chan_array = devm_kzalloc(&idev->dev, in at91_adc_channel_init()
486 ((idev->num_channels + 1) * in at91_adc_channel_init()
491 return -ENOMEM; in at91_adc_channel_init()
493 for_each_set_bit(bit, &st->channels_mask, st->num_channels) { in at91_adc_channel_init()
496 chan->type = IIO_VOLTAGE; in at91_adc_channel_init()
497 chan->indexed = 1; in at91_adc_channel_init()
498 chan->channel = bit; in at91_adc_channel_init()
499 chan->scan_index = idx; in at91_adc_channel_init()
500 chan->scan_type.sign = 'u'; in at91_adc_channel_init()
501 chan->scan_type.realbits = st->res; in at91_adc_channel_init()
502 chan->scan_type.storagebits = 16; in at91_adc_channel_init()
503 chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); in at91_adc_channel_init()
504 chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW); in at91_adc_channel_init()
509 timestamp->type = IIO_TIMESTAMP; in at91_adc_channel_init()
510 timestamp->channel = -1; in at91_adc_channel_init()
511 timestamp->scan_index = idx; in at91_adc_channel_init()
512 timestamp->scan_type.sign = 's'; in at91_adc_channel_init()
513 timestamp->scan_type.realbits = 64; in at91_adc_channel_init()
514 timestamp->scan_type.storagebits = 64; in at91_adc_channel_init()
516 idev->channels = chan_array; in at91_adc_channel_init()
517 return idev->num_channels; in at91_adc_channel_init()
527 for (i = 0; i < st->trigger_number; i++) { in at91_adc_get_trigger_value_by_name()
529 "%s-dev%d-%s", in at91_adc_get_trigger_value_by_name()
530 idev->name, in at91_adc_get_trigger_value_by_name()
531 idev->id, in at91_adc_get_trigger_value_by_name()
534 return -ENOMEM; in at91_adc_get_trigger_value_by_name()
539 return -EINVAL; in at91_adc_get_trigger_value_by_name()
546 return -EINVAL; in at91_adc_get_trigger_value_by_name()
553 struct at91_adc_reg_desc *reg = st->registers; in at91_adc_configure_trigger()
554 u32 status = at91_adc_readl(st, reg->trigger_register); in at91_adc_configure_trigger()
559 st->trigger_list, in at91_adc_configure_trigger()
560 idev->trig->name); in at91_adc_configure_trigger()
565 st->buffer = kmalloc(idev->scan_bytes, GFP_KERNEL); in at91_adc_configure_trigger()
566 if (st->buffer == NULL) in at91_adc_configure_trigger()
567 return -ENOMEM; in at91_adc_configure_trigger()
569 at91_adc_writel(st, reg->trigger_register, in at91_adc_configure_trigger()
572 for_each_set_bit(bit, idev->active_scan_mask, in at91_adc_configure_trigger()
573 st->num_channels) { in at91_adc_configure_trigger()
574 struct iio_chan_spec const *chan = idev->channels + bit; in at91_adc_configure_trigger()
576 AT91_ADC_CH(chan->channel)); in at91_adc_configure_trigger()
579 at91_adc_writel(st, AT91_ADC_IER, reg->drdy_mask); in at91_adc_configure_trigger()
582 at91_adc_writel(st, AT91_ADC_IDR, reg->drdy_mask); in at91_adc_configure_trigger()
584 at91_adc_writel(st, reg->trigger_register, in at91_adc_configure_trigger()
587 for_each_set_bit(bit, idev->active_scan_mask, in at91_adc_configure_trigger()
588 st->num_channels) { in at91_adc_configure_trigger()
589 struct iio_chan_spec const *chan = idev->channels + bit; in at91_adc_configure_trigger()
591 AT91_ADC_CH(chan->channel)); in at91_adc_configure_trigger()
593 kfree(st->buffer); in at91_adc_configure_trigger()
609 trig = iio_trigger_alloc("%s-dev%d-%s", idev->name, in at91_adc_allocate_trigger()
610 idev->id, trigger->name); in at91_adc_allocate_trigger()
614 trig->dev.parent = idev->dev.parent; in at91_adc_allocate_trigger()
616 trig->ops = &at91_adc_trigger_ops; in at91_adc_allocate_trigger()
632 st->trig = devm_kcalloc(&idev->dev, in at91_adc_trigger_init()
633 st->trigger_number, sizeof(*st->trig), in at91_adc_trigger_init()
636 if (st->trig == NULL) { in at91_adc_trigger_init()
637 ret = -ENOMEM; in at91_adc_trigger_init()
641 for (i = 0; i < st->trigger_number; i++) { in at91_adc_trigger_init()
642 if (st->trigger_list[i].is_external && !(st->use_external)) in at91_adc_trigger_init()
645 st->trig[i] = at91_adc_allocate_trigger(idev, in at91_adc_trigger_init()
646 st->trigger_list + i); in at91_adc_trigger_init()
647 if (st->trig[i] == NULL) { in at91_adc_trigger_init()
648 dev_err(&idev->dev, in at91_adc_trigger_init()
650 ret = -ENOMEM; in at91_adc_trigger_init()
658 for (i--; i >= 0; i--) { in at91_adc_trigger_init()
659 iio_trigger_unregister(st->trig[i]); in at91_adc_trigger_init()
660 iio_trigger_free(st->trig[i]); in at91_adc_trigger_init()
671 for (i = 0; i < st->trigger_number; i++) { in at91_adc_trigger_remove()
672 iio_trigger_unregister(st->trig[i]); in at91_adc_trigger_remove()
673 iio_trigger_free(st->trig[i]); in at91_adc_trigger_remove()
697 mutex_lock(&st->lock); in at91_adc_read_raw()
699 st->chnb = chan->channel; in at91_adc_read_raw()
701 AT91_ADC_CH(chan->channel)); in at91_adc_read_raw()
702 at91_adc_writel(st, AT91_ADC_IER, BIT(chan->channel)); in at91_adc_read_raw()
705 ret = wait_event_interruptible_timeout(st->wq_data_avail, in at91_adc_read_raw()
706 st->done, in at91_adc_read_raw()
709 /* Disable interrupts, regardless if adc conversion was in at91_adc_read_raw()
713 AT91_ADC_CH(chan->channel)); in at91_adc_read_raw()
714 at91_adc_writel(st, AT91_ADC_IDR, BIT(chan->channel)); in at91_adc_read_raw()
718 *val = st->last_value; in at91_adc_read_raw()
719 st->last_value = 0; in at91_adc_read_raw()
720 st->done = false; in at91_adc_read_raw()
724 dev_err(&idev->dev, "ADC Channel %d timeout.\n", in at91_adc_read_raw()
725 chan->channel); in at91_adc_read_raw()
726 ret = -ETIMEDOUT; in at91_adc_read_raw()
729 mutex_unlock(&st->lock); in at91_adc_read_raw()
733 *val = st->vref_mv; in at91_adc_read_raw()
734 *val2 = chan->scan_type.realbits; in at91_adc_read_raw()
739 return -EINVAL; in at91_adc_read_raw()
746 struct device_node *np = pdev->dev.of_node; in at91_adc_of_get_resolution()
751 count = of_property_count_strings(np, "atmel,adc-res-names"); in at91_adc_of_get_resolution()
753 dev_err(&idev->dev, "You must specified at least two resolution names for " in at91_adc_of_get_resolution()
754 "adc-res-names property in the DT\n"); in at91_adc_of_get_resolution()
760 return -ENOMEM; in at91_adc_of_get_resolution()
762 if (of_property_read_u32_array(np, "atmel,adc-res", resolutions, count)) { in at91_adc_of_get_resolution()
763 dev_err(&idev->dev, "Missing adc-res property in the DT.\n"); in at91_adc_of_get_resolution()
764 ret = -ENODEV; in at91_adc_of_get_resolution()
768 if (of_property_read_string(np, "atmel,adc-use-res", (const char **)&res_name)) in at91_adc_of_get_resolution()
772 if (of_property_read_string_index(np, "atmel,adc-res-names", i, (const char **)&s)) in at91_adc_of_get_resolution()
778 st->res = resolutions[i]; in at91_adc_of_get_resolution()
780 st->low_res = true; in at91_adc_of_get_resolution()
782 st->low_res = false; in at91_adc_of_get_resolution()
784 dev_info(&idev->dev, "Resolution used: %u bits\n", st->res); in at91_adc_of_get_resolution()
788 dev_err(&idev->dev, "There is no resolution for %s\n", res_name); in at91_adc_of_get_resolution()
798 * Number of ticks needed to cover the startup time of the ADC in calc_startup_ticks_9260()
801 * Startup Time = (ticks + 1) * 8 / ADC Clock in calc_startup_ticks_9260()
803 return round_up((startup_time * adc_clk_khz / 1000) - 1, 8) / 8; in calc_startup_ticks_9260()
810 * Startup Time = <lookup_table_value> / ADC Clock in calc_startup_ticks_9x5()
829 ticks = size - 1; in calc_startup_ticks_9x5()
842 ret = of_property_read_u32(node, "atmel,adc-ts-wires", &prop); in at91_adc_probe_dt_ts()
844 dev_info(dev, "ADC Touch screen is disabled.\n"); in at91_adc_probe_dt_ts()
851 st->touchscreen_type = prop; in at91_adc_probe_dt_ts()
855 return -EINVAL; in at91_adc_probe_dt_ts()
858 if (!st->caps->has_tsmr) in at91_adc_probe_dt_ts()
861 of_property_read_u32(node, "atmel,adc-ts-pressure-threshold", &prop); in at91_adc_probe_dt_ts()
862 st->ts_pressure_threshold = prop; in at91_adc_probe_dt_ts()
863 if (st->ts_pressure_threshold) { in at91_adc_probe_dt_ts()
867 return -EINVAL; in at91_adc_probe_dt_ts()
875 struct device_node *node = pdev->dev.of_node; in at91_adc_probe_dt()
881 return -EINVAL; in at91_adc_probe_dt()
883 st->caps = (struct at91_adc_caps *) in at91_adc_probe_dt()
884 of_match_device(at91_adc_dt_ids, &pdev->dev)->data; in at91_adc_probe_dt()
886 st->use_external = of_property_read_bool(node, "atmel,adc-use-external-triggers"); in at91_adc_probe_dt()
888 if (of_property_read_u32(node, "atmel,adc-channels-used", &prop)) { in at91_adc_probe_dt()
889 dev_err(&idev->dev, "Missing adc-channels-used property in the DT.\n"); in at91_adc_probe_dt()
890 ret = -EINVAL; in at91_adc_probe_dt()
893 st->channels_mask = prop; in at91_adc_probe_dt()
895 st->sleep_mode = of_property_read_bool(node, "atmel,adc-sleep-mode"); in at91_adc_probe_dt()
897 if (of_property_read_u32(node, "atmel,adc-startup-time", &prop)) { in at91_adc_probe_dt()
898 dev_err(&idev->dev, "Missing adc-startup-time property in the DT.\n"); in at91_adc_probe_dt()
899 ret = -EINVAL; in at91_adc_probe_dt()
902 st->startup_time = prop; in at91_adc_probe_dt()
905 of_property_read_u32(node, "atmel,adc-sample-hold-time", &prop); in at91_adc_probe_dt()
906 st->sample_hold_time = prop; in at91_adc_probe_dt()
908 if (of_property_read_u32(node, "atmel,adc-vref", &prop)) { in at91_adc_probe_dt()
909 dev_err(&idev->dev, "Missing adc-vref property in the DT.\n"); in at91_adc_probe_dt()
910 ret = -EINVAL; in at91_adc_probe_dt()
913 st->vref_mv = prop; in at91_adc_probe_dt()
919 st->registers = &st->caps->registers; in at91_adc_probe_dt()
920 st->num_channels = st->caps->num_channels; in at91_adc_probe_dt()
921 st->trigger_number = of_get_child_count(node); in at91_adc_probe_dt()
922 st->trigger_list = devm_kcalloc(&idev->dev, in at91_adc_probe_dt()
923 st->trigger_number, in at91_adc_probe_dt()
926 if (!st->trigger_list) { in at91_adc_probe_dt()
927 dev_err(&idev->dev, "Could not allocate trigger list memory.\n"); in at91_adc_probe_dt()
928 ret = -ENOMEM; in at91_adc_probe_dt()
933 struct at91_adc_trigger *trig = st->trigger_list + i; in at91_adc_probe_dt()
936 if (of_property_read_string(trig_node, "trigger-name", &name)) { in at91_adc_probe_dt()
937 dev_err(&idev->dev, "Missing trigger-name property in the DT.\n"); in at91_adc_probe_dt()
938 ret = -EINVAL; in at91_adc_probe_dt()
941 trig->name = name; in at91_adc_probe_dt()
943 if (of_property_read_u32(trig_node, "trigger-value", &prop)) { in at91_adc_probe_dt()
944 dev_err(&idev->dev, "Missing trigger-value property in the DT.\n"); in at91_adc_probe_dt()
945 ret = -EINVAL; in at91_adc_probe_dt()
948 trig->value = prop; in at91_adc_probe_dt()
949 trig->is_external = of_property_read_bool(trig_node, "trigger-external"); in at91_adc_probe_dt()
954 if (st->caps->has_ts) in at91_adc_probe_dt()
955 return at91_adc_probe_dt_ts(node, st, &idev->dev); in at91_adc_probe_dt()
957 dev_info(&idev->dev, "not support touchscreen in the adc compatible string.\n"); in at91_adc_probe_dt()
968 struct at91_adc_data *pdata = pdev->dev.platform_data; in at91_adc_probe_pdata()
971 return -EINVAL; in at91_adc_probe_pdata()
973 st->caps = (struct at91_adc_caps *) in at91_adc_probe_pdata()
974 platform_get_device_id(pdev)->driver_data; in at91_adc_probe_pdata()
976 st->use_external = pdata->use_external_triggers; in at91_adc_probe_pdata()
977 st->vref_mv = pdata->vref; in at91_adc_probe_pdata()
978 st->channels_mask = pdata->channels_used; in at91_adc_probe_pdata()
979 st->num_channels = st->caps->num_channels; in at91_adc_probe_pdata()
980 st->startup_time = pdata->startup_time; in at91_adc_probe_pdata()
981 st->trigger_number = pdata->trigger_number; in at91_adc_probe_pdata()
982 st->trigger_list = pdata->trigger_list; in at91_adc_probe_pdata()
983 st->registers = &st->caps->registers; in at91_adc_probe_pdata()
984 st->touchscreen_type = pdata->touchscreen_type; in at91_adc_probe_pdata()
998 if (st->caps->has_tsmr) in atmel_ts_open()
1009 if (st->caps->has_tsmr) in atmel_ts_close()
1022 /* a Pen Detect Debounce Time is necessary for the ADC Touch to avoid in at91_ts_hw_init()
1026 st->ts_pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz / in at91_ts_hw_init()
1029 while (st->ts_pendbc >> ++i) in at91_ts_hw_init()
1031 if (abs(st->ts_pendbc - (1 << i)) < abs(st->ts_pendbc - (1 << (i - 1)))) in at91_ts_hw_init()
1032 st->ts_pendbc = i; in at91_ts_hw_init()
1034 st->ts_pendbc = i - 1; in at91_ts_hw_init()
1036 if (!st->caps->has_tsmr) { in at91_ts_hw_init()
1040 reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC; in at91_ts_hw_init()
1046 st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US_RL * in at91_ts_hw_init()
1047 adc_clk_khz / 1000) - 1, 1); in at91_ts_hw_init()
1057 dev_dbg(&idev->dev, "adc_clk at: %d KHz, tssctim at: %d\n", in at91_ts_hw_init()
1060 if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE) in at91_ts_hw_init()
1066 reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average) in at91_ts_hw_init()
1068 reg |= AT91_ADC_TSMR_PENDBC_(st->ts_pendbc) & AT91_ADC_TSMR_PENDBC; in at91_ts_hw_init()
1075 /* Change adc internal resistor value for better pen detection, in at91_ts_hw_init()
1080 at91_adc_writel(st, AT91_ADC_ACR, st->caps->ts_pen_detect_sensitivity in at91_ts_hw_init()
1084 st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US * in at91_ts_hw_init()
1085 adc_clk_khz / 1000) - 1, 1); in at91_ts_hw_init()
1099 dev_err(&idev->dev, "Failed to allocate TS device!\n"); in at91_ts_register()
1100 return -ENOMEM; in at91_ts_register()
1103 input->name = DRIVER_NAME; in at91_ts_register()
1104 input->id.bustype = BUS_HOST; in at91_ts_register()
1105 input->dev.parent = &pdev->dev; in at91_ts_register()
1106 input->open = atmel_ts_open; in at91_ts_register()
1107 input->close = atmel_ts_close; in at91_ts_register()
1109 __set_bit(EV_ABS, input->evbit); in at91_ts_register()
1110 __set_bit(EV_KEY, input->evbit); in at91_ts_register()
1111 __set_bit(BTN_TOUCH, input->keybit); in at91_ts_register()
1112 if (st->caps->has_tsmr) { in at91_ts_register()
1113 input_set_abs_params(input, ABS_X, 0, (1 << MAX_POS_BITS) - 1, in at91_ts_register()
1115 input_set_abs_params(input, ABS_Y, 0, (1 << MAX_POS_BITS) - 1, in at91_ts_register()
1119 if (st->touchscreen_type != ATMEL_ADC_TOUCHSCREEN_4WIRE) { in at91_ts_register()
1120 dev_err(&pdev->dev, in at91_ts_register()
1122 ret = -EINVAL; in at91_ts_register()
1126 input_set_abs_params(input, ABS_X, 0, (1 << MAX_RLPOS_BITS) - 1, in at91_ts_register()
1128 input_set_abs_params(input, ABS_Y, 0, (1 << MAX_RLPOS_BITS) - 1, in at91_ts_register()
1132 st->ts_input = input; in at91_ts_register()
1142 input_free_device(st->ts_input); in at91_ts_register()
1148 input_unregister_device(st->ts_input); in at91_ts_unregister()
1159 idev = devm_iio_device_alloc(&pdev->dev, sizeof(struct at91_adc_state)); in at91_adc_probe()
1161 return -ENOMEM; in at91_adc_probe()
1165 if (pdev->dev.of_node) in at91_adc_probe()
1171 dev_err(&pdev->dev, "No platform data available.\n"); in at91_adc_probe()
1172 return -EINVAL; in at91_adc_probe()
1177 idev->name = dev_name(&pdev->dev); in at91_adc_probe()
1178 idev->modes = INDIO_DIRECT_MODE; in at91_adc_probe()
1179 idev->info = &at91_adc_info; in at91_adc_probe()
1181 st->irq = platform_get_irq(pdev, 0); in at91_adc_probe()
1182 if (st->irq < 0) in at91_adc_probe()
1183 return -ENODEV; in at91_adc_probe()
1185 st->reg_base = devm_platform_ioremap_resource(pdev, 0); in at91_adc_probe()
1186 if (IS_ERR(st->reg_base)) in at91_adc_probe()
1187 return PTR_ERR(st->reg_base); in at91_adc_probe()
1196 if (st->caps->has_tsmr) in at91_adc_probe()
1197 ret = request_irq(st->irq, at91_adc_9x5_interrupt, 0, in at91_adc_probe()
1198 pdev->dev.driver->name, idev); in at91_adc_probe()
1200 ret = request_irq(st->irq, at91_adc_rl_interrupt, 0, in at91_adc_probe()
1201 pdev->dev.driver->name, idev); in at91_adc_probe()
1203 dev_err(&pdev->dev, "Failed to allocate IRQ.\n"); in at91_adc_probe()
1207 st->clk = devm_clk_get(&pdev->dev, "adc_clk"); in at91_adc_probe()
1208 if (IS_ERR(st->clk)) { in at91_adc_probe()
1209 dev_err(&pdev->dev, "Failed to get the clock.\n"); in at91_adc_probe()
1210 ret = PTR_ERR(st->clk); in at91_adc_probe()
1214 ret = clk_prepare_enable(st->clk); in at91_adc_probe()
1216 dev_err(&pdev->dev, in at91_adc_probe()
1221 st->adc_clk = devm_clk_get(&pdev->dev, "adc_op_clk"); in at91_adc_probe()
1222 if (IS_ERR(st->adc_clk)) { in at91_adc_probe()
1223 dev_err(&pdev->dev, "Failed to get the ADC clock.\n"); in at91_adc_probe()
1224 ret = PTR_ERR(st->adc_clk); in at91_adc_probe()
1228 ret = clk_prepare_enable(st->adc_clk); in at91_adc_probe()
1230 dev_err(&pdev->dev, in at91_adc_probe()
1231 "Could not prepare or enable the ADC clock.\n"); in at91_adc_probe()
1237 * datasheet : ADC Clock = MCK / ((Prescaler + 1) * 2), ADC Clock being in at91_adc_probe()
1240 mstrclk = clk_get_rate(st->clk); in at91_adc_probe()
1241 adc_clk = clk_get_rate(st->adc_clk); in at91_adc_probe()
1244 dev_dbg(&pdev->dev, "Master clock is set as: %d Hz, adc_clk should set as: %d Hz\n", in at91_adc_probe()
1247 prsc = (mstrclk / (2 * adc_clk)) - 1; in at91_adc_probe()
1249 if (!st->startup_time) { in at91_adc_probe()
1250 dev_err(&pdev->dev, "No startup time available.\n"); in at91_adc_probe()
1251 ret = -EINVAL; in at91_adc_probe()
1254 ticks = (*st->caps->calc_startup_ticks)(st->startup_time, adc_clk_khz); in at91_adc_probe()
1257 * a minimal Sample and Hold Time is necessary for the ADC to guarantee in at91_adc_probe()
1261 if (st->sample_hold_time > 0) in at91_adc_probe()
1262 shtim = round_up((st->sample_hold_time * adc_clk_khz / 1000) in at91_adc_probe()
1263 - 1, 1); in at91_adc_probe()
1267 reg = AT91_ADC_PRESCAL_(prsc) & st->registers->mr_prescal_mask; in at91_adc_probe()
1268 reg |= AT91_ADC_STARTUP_(ticks) & st->registers->mr_startup_mask; in at91_adc_probe()
1269 if (st->low_res) in at91_adc_probe()
1271 if (st->sleep_mode) in at91_adc_probe()
1276 /* Setup the ADC channels available on the board */ in at91_adc_probe()
1279 dev_err(&pdev->dev, "Couldn't initialize the channels.\n"); in at91_adc_probe()
1283 init_waitqueue_head(&st->wq_data_avail); in at91_adc_probe()
1284 mutex_init(&st->lock); in at91_adc_probe()
1289 * trigger for classic adc. in at91_adc_probe()
1291 if (!st->touchscreen_type) { in at91_adc_probe()
1294 dev_err(&pdev->dev, "Couldn't initialize the buffer.\n"); in at91_adc_probe()
1300 dev_err(&pdev->dev, "Couldn't setup the triggers.\n"); in at91_adc_probe()
1314 dev_err(&pdev->dev, "Couldn't register the device.\n"); in at91_adc_probe()
1321 if (!st->touchscreen_type) { in at91_adc_probe()
1328 clk_disable_unprepare(st->adc_clk); in at91_adc_probe()
1330 clk_disable_unprepare(st->clk); in at91_adc_probe()
1332 free_irq(st->irq, idev); in at91_adc_probe()
1342 if (!st->touchscreen_type) { in at91_adc_remove()
1348 clk_disable_unprepare(st->adc_clk); in at91_adc_remove()
1349 clk_disable_unprepare(st->clk); in at91_adc_remove()
1350 free_irq(st->irq, idev); in at91_adc_remove()
1362 clk_disable_unprepare(st->clk); in at91_adc_suspend()
1372 clk_prepare_enable(st->clk); in at91_adc_resume()
1441 { .compatible = "atmel,at91sam9260-adc", .data = &at91sam9260_caps },
1442 { .compatible = "atmel,at91sam9rl-adc", .data = &at91sam9rl_caps },
1443 { .compatible = "atmel,at91sam9g45-adc", .data = &at91sam9g45_caps },
1444 { .compatible = "atmel,at91sam9x5-adc", .data = &at91sam9x5_caps },
1451 .name = "at91sam9260-adc",
1454 .name = "at91sam9rl-adc",
1457 .name = "at91sam9g45-adc",
1460 .name = "at91sam9x5-adc",
1482 MODULE_DESCRIPTION("Atmel AT91 ADC Driver");
1483 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");