136 #define AT91_ADC_CHAN(st, ch) \  argument
137 	(st->registers->channel_base + (ch * 4))
138 #define at91_adc_readl(st, reg) \  argument
139 	(readl_relaxed(st->reg_base + reg))
140 #define at91_adc_writel(st, reg, val) \  argument
141 	(writel_relaxed(val, st->reg_base + reg))
268 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_trigger_handler()  local
276 		st->buffer[j] = at91_adc_readl(st, AT91_ADC_CHAN(st, chan->channel));  in at91_adc_trigger_handler()
280 	iio_push_to_buffers_with_timestamp(idev, st->buffer, pf->timestamp);  in at91_adc_trigger_handler()
285 	at91_adc_readl(st, AT91_ADC_LCDR);  in at91_adc_trigger_handler()
287 	enable_irq(st->irq);  in at91_adc_trigger_handler()
295 	struct at91_adc_state *st = iio_priv(idev);  in handle_adc_eoc_trigger()  local
301 		st->last_value = at91_adc_readl(st, AT91_ADC_CHAN(st, st->chnb));  in handle_adc_eoc_trigger()
303 		at91_adc_readl(st, AT91_ADC_LCDR);  in handle_adc_eoc_trigger()
304 		st->done = true;  in handle_adc_eoc_trigger()
305 		wake_up_interruptible(&st->wq_data_avail);  in handle_adc_eoc_trigger()
311 	struct at91_adc_state *st = iio_priv(idev);  in at91_ts_sample()  local
317 	unsigned int xyz_mask_bits = st->res;  in at91_ts_sample()
322 	reg = at91_adc_readl(st, AT91_ADC_TSXPOSR);  in at91_ts_sample()
333 	reg = at91_adc_readl(st, AT91_ADC_TSYPOSR);  in at91_ts_sample()
344 	reg = at91_adc_readl(st, AT91_ADC_TSPRESSR);  in at91_ts_sample()
352 		pres = st->ts_pressure_threshold;	/* no pen contacted */  in at91_ts_sample()
357 	if (pres < st->ts_pressure_threshold) {  in at91_ts_sample()
360 		input_report_abs(st->ts_input, ABS_X, x);  in at91_ts_sample()
361 		input_report_abs(st->ts_input, ABS_Y, y);  in at91_ts_sample()
362 		input_report_abs(st->ts_input, ABS_PRESSURE, pres);  in at91_ts_sample()
363 		input_report_key(st->ts_input, BTN_TOUCH, 1);  in at91_ts_sample()
364 		input_sync(st->ts_input);  in at91_ts_sample()
375 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_rl_interrupt()  local
376 	u32 status = at91_adc_readl(st, st->registers->status_register);  in at91_adc_rl_interrupt()
379 	status &= at91_adc_readl(st, AT91_ADC_IMR);  in at91_adc_rl_interrupt()
380 	if (status & GENMASK(st->num_channels - 1, 0))  in at91_adc_rl_interrupt()
385 		reg = at91_adc_readl(st, AT91_ADC_MR);  in at91_adc_rl_interrupt()
387 		at91_adc_writel(st, AT91_ADC_MR, reg);  in at91_adc_rl_interrupt()
389 		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);  in at91_adc_rl_interrupt()
390 		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_NOPEN  in at91_adc_rl_interrupt()
393 		at91_adc_writel(st, st->registers->trigger_register,  in at91_adc_rl_interrupt()
395 			AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val));  in at91_adc_rl_interrupt()
397 		reg = at91_adc_readl(st, AT91_ADC_MR);  in at91_adc_rl_interrupt()
398 		reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC;  in at91_adc_rl_interrupt()
399 		at91_adc_writel(st, AT91_ADC_MR, reg);  in at91_adc_rl_interrupt()
400 		at91_adc_writel(st, st->registers->trigger_register,  in at91_adc_rl_interrupt()
403 		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_NOPEN  in at91_adc_rl_interrupt()
405 		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN);  in at91_adc_rl_interrupt()
406 		st->ts_bufferedmeasure = false;  in at91_adc_rl_interrupt()
407 		input_report_key(st->ts_input, BTN_TOUCH, 0);  in at91_adc_rl_interrupt()
408 		input_sync(st->ts_input);  in at91_adc_rl_interrupt()
409 	} else if (status & AT91_ADC_EOC(3) && st->ts_input) {  in at91_adc_rl_interrupt()
411 		if (st->ts_bufferedmeasure) {  in at91_adc_rl_interrupt()
417 			input_report_abs(st->ts_input, ABS_X, st->ts_prev_absx);  in at91_adc_rl_interrupt()
418 			input_report_abs(st->ts_input, ABS_Y, st->ts_prev_absy);  in at91_adc_rl_interrupt()
419 			input_report_key(st->ts_input, BTN_TOUCH, 1);  in at91_adc_rl_interrupt()
420 			input_sync(st->ts_input);  in at91_adc_rl_interrupt()
422 			st->ts_bufferedmeasure = true;  in at91_adc_rl_interrupt()
425 		st->ts_prev_absx = at91_adc_readl(st, AT91_ADC_CHAN(st, 3))  in at91_adc_rl_interrupt()
427 		st->ts_prev_absx /= at91_adc_readl(st, AT91_ADC_CHAN(st, 2));  in at91_adc_rl_interrupt()
429 		st->ts_prev_absy = at91_adc_readl(st, AT91_ADC_CHAN(st, 1))  in at91_adc_rl_interrupt()
431 		st->ts_prev_absy /= at91_adc_readl(st, AT91_ADC_CHAN(st, 0));  in at91_adc_rl_interrupt()
440 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_9x5_interrupt()  local
441 	u32 status = at91_adc_readl(st, st->registers->status_register);  in at91_adc_9x5_interrupt()
447 	if (status & GENMASK(st->num_channels - 1, 0))  in at91_adc_9x5_interrupt()
451 		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);  in at91_adc_9x5_interrupt()
452 		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_NOPEN |  in at91_adc_9x5_interrupt()
455 		at91_adc_writel(st, st->registers->trigger_register,  in at91_adc_9x5_interrupt()
457 			AT91_ADC_TRGR_TRGPER_(st->ts_sample_period_val));  in at91_adc_9x5_interrupt()
459 		at91_adc_writel(st, st->registers->trigger_register, 0);  in at91_adc_9x5_interrupt()
460 		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_NOPEN |  in at91_adc_9x5_interrupt()
462 		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN);  in at91_adc_9x5_interrupt()
464 		input_report_key(st->ts_input, BTN_TOUCH, 0);  in at91_adc_9x5_interrupt()
465 		input_sync(st->ts_input);  in at91_adc_9x5_interrupt()
476 			at91_adc_readl(st, AT91_ADC_TSXPOSR);  in at91_adc_9x5_interrupt()
477 			at91_adc_readl(st, AT91_ADC_TSYPOSR);  in at91_adc_9x5_interrupt()
478 			at91_adc_readl(st, AT91_ADC_TSPRESSR);  in at91_adc_9x5_interrupt()
487 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_channel_init()  local
493 	if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE)  in at91_adc_channel_init()
495 	else if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_5WIRE)  in at91_adc_channel_init()
499 	st->channels_mask &= ~rsvd_mask;  in at91_adc_channel_init()
501 	idev->num_channels = bitmap_weight(&st->channels_mask,  in at91_adc_channel_init()
502 					   st->num_channels) + 1;  in at91_adc_channel_init()
512 	for_each_set_bit(bit, &st->channels_mask, st->num_channels) {  in at91_adc_channel_init()
520 		chan->scan_type.realbits = st->res;  in at91_adc_channel_init()
543 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_get_trigger_value_by_name()  local
546 	for (i = 0; i < st->caps->trigger_number; i++) {  in at91_adc_get_trigger_value_by_name()
571 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_configure_trigger()  local
572 	const struct at91_adc_reg_desc *reg = st->registers;  in at91_adc_configure_trigger()
573 	u32 status = at91_adc_readl(st, reg->trigger_register);  in at91_adc_configure_trigger()
578 						   st->caps->triggers,  in at91_adc_configure_trigger()
584 		st->buffer = kmalloc(idev->scan_bytes, GFP_KERNEL);  in at91_adc_configure_trigger()
585 		if (st->buffer == NULL)  in at91_adc_configure_trigger()
588 		at91_adc_writel(st, reg->trigger_register,  in at91_adc_configure_trigger()
592 				 st->num_channels) {  in at91_adc_configure_trigger()
594 			at91_adc_writel(st, AT91_ADC_CHER,  in at91_adc_configure_trigger()
598 		at91_adc_writel(st, AT91_ADC_IER, reg->drdy_mask);  in at91_adc_configure_trigger()
601 		at91_adc_writel(st, AT91_ADC_IDR, reg->drdy_mask);  in at91_adc_configure_trigger()
603 		at91_adc_writel(st, reg->trigger_register,  in at91_adc_configure_trigger()
607 				 st->num_channels) {  in at91_adc_configure_trigger()
609 			at91_adc_writel(st, AT91_ADC_CHDR,  in at91_adc_configure_trigger()
612 		kfree(st->buffer);  in at91_adc_configure_trigger()
645 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_trigger_init()  local
648 	st->trig = devm_kcalloc(&idev->dev,  in at91_adc_trigger_init()
649 				st->caps->trigger_number, sizeof(*st->trig),  in at91_adc_trigger_init()
652 	if (st->trig == NULL) {  in at91_adc_trigger_init()
657 	for (i = 0; i < st->caps->trigger_number; i++) {  in at91_adc_trigger_init()
658 		if (st->caps->triggers[i].is_external && !(st->use_external))  in at91_adc_trigger_init()
661 		st->trig[i] = at91_adc_allocate_trigger(idev,  in at91_adc_trigger_init()
662 							st->caps->triggers + i);  in at91_adc_trigger_init()
663 		if (st->trig[i] == NULL) {  in at91_adc_trigger_init()
675 		iio_trigger_unregister(st->trig[i]);  in at91_adc_trigger_init()
676 		iio_trigger_free(st->trig[i]);  in at91_adc_trigger_init()
684 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_trigger_remove()  local
687 	for (i = 0; i < st->caps->trigger_number; i++) {  in at91_adc_trigger_remove()
688 		iio_trigger_unregister(st->trig[i]);  in at91_adc_trigger_remove()
689 		iio_trigger_free(st->trig[i]);  in at91_adc_trigger_remove()
708 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_read_raw()  local
713 		mutex_lock(&st->lock);  in at91_adc_read_raw()
715 		st->chnb = chan->channel;  in at91_adc_read_raw()
716 		at91_adc_writel(st, AT91_ADC_CHER,  in at91_adc_read_raw()
718 		at91_adc_writel(st, AT91_ADC_IER, BIT(chan->channel));  in at91_adc_read_raw()
719 		at91_adc_writel(st, AT91_ADC_CR, AT91_ADC_START);  in at91_adc_read_raw()
721 		ret = wait_event_interruptible_timeout(st->wq_data_avail,  in at91_adc_read_raw()
722 						       st->done,  in at91_adc_read_raw()
728 		at91_adc_writel(st, AT91_ADC_CHDR,  in at91_adc_read_raw()
730 		at91_adc_writel(st, AT91_ADC_IDR, BIT(chan->channel));  in at91_adc_read_raw()
734 			*val = st->last_value;  in at91_adc_read_raw()
735 			st->last_value = 0;  in at91_adc_read_raw()
736 			st->done = false;  in at91_adc_read_raw()
745 		mutex_unlock(&st->lock);  in at91_adc_read_raw()
749 		*val = st->vref_mv;  in at91_adc_read_raw()
799 	struct at91_adc_state *st, struct device *dev)  in at91_adc_probe_dt_ts()  argument
813 		st->touchscreen_type = prop;  in at91_adc_probe_dt_ts()
820 	if (!st->caps->has_tsmr)  in at91_adc_probe_dt_ts()
824 	st->ts_pressure_threshold = prop;  in at91_adc_probe_dt_ts()
825 	if (st->ts_pressure_threshold) {  in at91_adc_probe_dt_ts()
840 	struct at91_adc_state *st = input_get_drvdata(dev);  in atmel_ts_open()  local
842 	if (st->caps->has_tsmr)  in atmel_ts_open()
843 		at91_adc_writel(st, AT91_ADC_IER, AT91_ADC_IER_PEN);  in atmel_ts_open()
845 		at91_adc_writel(st, AT91_ADC_IER, AT91RL_ADC_IER_PEN);  in atmel_ts_open()
851 	struct at91_adc_state *st = input_get_drvdata(dev);  in atmel_ts_close()  local
853 	if (st->caps->has_tsmr)  in atmel_ts_close()
854 		at91_adc_writel(st, AT91_ADC_IDR, AT91_ADC_IER_PEN);  in atmel_ts_close()
856 		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);  in atmel_ts_close()
861 	struct at91_adc_state *st = iio_priv(idev);  in at91_ts_hw_init()  local
870 	st->ts_pendbc = round_up(TOUCH_PEN_DETECT_DEBOUNCE_US * adc_clk_khz /  in at91_ts_hw_init()
873 	while (st->ts_pendbc >> ++i)  in at91_ts_hw_init()
875 	if (abs(st->ts_pendbc - (1 << i)) < abs(st->ts_pendbc - (1 << (i - 1))))  in at91_ts_hw_init()
876 		st->ts_pendbc = i;  in at91_ts_hw_init()
878 		st->ts_pendbc = i - 1;  in at91_ts_hw_init()
880 	if (!st->caps->has_tsmr) {  in at91_ts_hw_init()
881 		reg = at91_adc_readl(st, AT91_ADC_MR);  in at91_ts_hw_init()
884 		reg |= AT91_ADC_PENDBC_(st->ts_pendbc) & AT91_ADC_PENDBC;  in at91_ts_hw_init()
885 		at91_adc_writel(st, AT91_ADC_MR, reg);  in at91_ts_hw_init()
888 		at91_adc_writel(st, AT91_ADC_TSR, reg);  in at91_ts_hw_init()
890 		st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US_RL *  in at91_ts_hw_init()
904 	if (st->touchscreen_type == ATMEL_ADC_TOUCHSCREEN_4WIRE)  in at91_ts_hw_init()
910 	reg |= AT91_ADC_TSMR_TSAV_(st->caps->ts_filter_average)  in at91_ts_hw_init()
912 	reg |= AT91_ADC_TSMR_PENDBC_(st->ts_pendbc) & AT91_ADC_TSMR_PENDBC;  in at91_ts_hw_init()
917 	at91_adc_writel(st, AT91_ADC_TSMR, reg);  in at91_ts_hw_init()
924 	at91_adc_writel(st, AT91_ADC_ACR, st->caps->ts_pen_detect_sensitivity  in at91_ts_hw_init()
928 	st->ts_sample_period_val = round_up((TOUCH_SAMPLE_PERIOD_US *  in at91_ts_hw_init()
937 	struct at91_adc_state *st = iio_priv(idev);  in at91_ts_register()  local
956 	if (st->caps->has_tsmr) {  in at91_ts_register()
963 		if (st->touchscreen_type != ATMEL_ADC_TOUCHSCREEN_4WIRE) {  in at91_ts_register()
976 	st->ts_input = input;  in at91_ts_register()
977 	input_set_drvdata(input, st);  in at91_ts_register()
986 	input_free_device(st->ts_input);  in at91_ts_register()
990 static void at91_ts_unregister(struct at91_adc_state *st)  in at91_ts_unregister()  argument
992 	input_unregister_device(st->ts_input);  in at91_ts_unregister()
1001 	struct at91_adc_state *st;  in at91_adc_probe()  local
1009 	st = iio_priv(idev);  in at91_adc_probe()
1011 	st->caps = of_device_get_match_data(&pdev->dev);  in at91_adc_probe()
1013 	st->use_external = of_property_read_bool(node, "atmel,adc-use-external-triggers");  in at91_adc_probe()
1019 	st->channels_mask = prop;  in at91_adc_probe()
1021 	st->sleep_mode = of_property_read_bool(node, "atmel,adc-sleep-mode");  in at91_adc_probe()
1027 	st->startup_time = prop;  in at91_adc_probe()
1031 	st->sample_hold_time = prop;  in at91_adc_probe()
1037 	st->vref_mv = prop;  in at91_adc_probe()
1039 	st->res = st->caps->high_res_bits;  in at91_adc_probe()
1040 	if (st->caps->low_res_bits &&  in at91_adc_probe()
1043 		st->res = st->caps->low_res_bits;  in at91_adc_probe()
1045 	dev_info(&idev->dev, "Resolution used: %u bits\n", st->res);  in at91_adc_probe()
1047 	st->registers = &st->caps->registers;  in at91_adc_probe()
1048 	st->num_channels = st->caps->num_channels;  in at91_adc_probe()
1051 	if (st->caps->has_ts) {  in at91_adc_probe()
1052 		ret = at91_adc_probe_dt_ts(node, st, &idev->dev);  in at91_adc_probe()
1063 	st->irq = platform_get_irq(pdev, 0);  in at91_adc_probe()
1064 	if (st->irq < 0)  in at91_adc_probe()
1067 	st->reg_base = devm_platform_ioremap_resource(pdev, 0);  in at91_adc_probe()
1068 	if (IS_ERR(st->reg_base))  in at91_adc_probe()
1069 		return PTR_ERR(st->reg_base);  in at91_adc_probe()
1075 	at91_adc_writel(st, AT91_ADC_CR, AT91_ADC_SWRST);  in at91_adc_probe()
1076 	at91_adc_writel(st, AT91_ADC_IDR, 0xFFFFFFFF);  in at91_adc_probe()
1078 	if (st->caps->has_tsmr)  in at91_adc_probe()
1079 		ret = request_irq(st->irq, at91_adc_9x5_interrupt, 0,  in at91_adc_probe()
1082 		ret = request_irq(st->irq, at91_adc_rl_interrupt, 0,  in at91_adc_probe()
1089 	st->clk = devm_clk_get(&pdev->dev, "adc_clk");  in at91_adc_probe()
1090 	if (IS_ERR(st->clk)) {  in at91_adc_probe()
1092 		ret = PTR_ERR(st->clk);  in at91_adc_probe()
1096 	ret = clk_prepare_enable(st->clk);  in at91_adc_probe()
1103 	st->adc_clk = devm_clk_get(&pdev->dev, "adc_op_clk");  in at91_adc_probe()
1104 	if (IS_ERR(st->adc_clk)) {  in at91_adc_probe()
1106 		ret = PTR_ERR(st->adc_clk);  in at91_adc_probe()
1110 	ret = clk_prepare_enable(st->adc_clk);  in at91_adc_probe()
1122 	mstrclk = clk_get_rate(st->clk);  in at91_adc_probe()
1123 	adc_clk = clk_get_rate(st->adc_clk);  in at91_adc_probe()
1131 	if (!st->startup_time) {  in at91_adc_probe()
1136 	ticks = (*st->caps->calc_startup_ticks)(st->startup_time, adc_clk_khz);  in at91_adc_probe()
1143 	if (st->sample_hold_time > 0)  in at91_adc_probe()
1144 		shtim = round_up((st->sample_hold_time * adc_clk_khz / 1000)  in at91_adc_probe()
1149 	reg = AT91_ADC_PRESCAL_(prsc) & st->registers->mr_prescal_mask;  in at91_adc_probe()
1150 	reg |= AT91_ADC_STARTUP_(ticks) & st->registers->mr_startup_mask;  in at91_adc_probe()
1151 	if (st->res == st->caps->low_res_bits)  in at91_adc_probe()
1153 	if (st->sleep_mode)  in at91_adc_probe()
1156 	at91_adc_writel(st, AT91_ADC_MR, reg);  in at91_adc_probe()
1165 	init_waitqueue_head(&st->wq_data_avail);  in at91_adc_probe()
1166 	mutex_init(&st->lock);  in at91_adc_probe()
1173 	if (!st->touchscreen_type) {  in at91_adc_probe()
1203 	if (!st->touchscreen_type) {  in at91_adc_probe()
1207 		at91_ts_unregister(st);  in at91_adc_probe()
1210 	clk_disable_unprepare(st->adc_clk);  in at91_adc_probe()
1212 	clk_disable_unprepare(st->clk);  in at91_adc_probe()
1214 	free_irq(st->irq, idev);  in at91_adc_probe()
1221 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_remove()  local
1224 	if (!st->touchscreen_type) {  in at91_adc_remove()
1228 		at91_ts_unregister(st);  in at91_adc_remove()
1230 	clk_disable_unprepare(st->adc_clk);  in at91_adc_remove()
1231 	clk_disable_unprepare(st->clk);  in at91_adc_remove()
1232 	free_irq(st->irq, idev);  in at91_adc_remove()
1241 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_suspend()  local
1244 	clk_disable_unprepare(st->clk);  in at91_adc_suspend()
1252 	struct at91_adc_state *st = iio_priv(idev);  in at91_adc_resume()  local
1254 	clk_prepare_enable(st->clk);  in at91_adc_resume()