1 // SPDX-License-Identifier: GPL-2.0-only
11  * Ast2600:
16 #include <linux/clk-provider.h>
179 	struct regmap *scu;  in aspeed_adc_set_trim_data()  local
185 		dev_warn(data->dev, "Couldn't find syscon node\n");  in aspeed_adc_set_trim_data()
186 		return -EOPNOTSUPP;  in aspeed_adc_set_trim_data()
188 	scu = syscon_node_to_regmap(syscon);  in aspeed_adc_set_trim_data()
190 	if (IS_ERR(scu)) {  in aspeed_adc_set_trim_data()
191 		dev_warn(data->dev, "Failed to get syscon regmap\n");  in aspeed_adc_set_trim_data()
192 		return -EOPNOTSUPP;  in aspeed_adc_set_trim_data()
194 	if (data->model_data->trim_locate) {  in aspeed_adc_set_trim_data()
195 		if (regmap_read(scu, data->model_data->trim_locate->offset,  in aspeed_adc_set_trim_data()
197 			dev_warn(data->dev,  in aspeed_adc_set_trim_data()
203 				 (data->model_data->trim_locate->field)) >>  in aspeed_adc_set_trim_data()
204 				__ffs(data->model_data->trim_locate->field);  in aspeed_adc_set_trim_data()
208 		dev_dbg(data->dev,  in aspeed_adc_set_trim_data()
210 			trimming_val, data->model_data->trim_locate->offset,  in aspeed_adc_set_trim_data()
211 			data->model_data->trim_locate->field);  in aspeed_adc_set_trim_data()
212 		writel(trimming_val, data->base + ASPEED_REG_COMPENSATION_TRIM);  in aspeed_adc_set_trim_data()
224 		readl(data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_compensation()
233 	 * value. We can get compensating value = 0x200 - ADC read raw value.  in aspeed_adc_compensation()
238 	       data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_compensation()
250 		ndelay(data->sample_period_ns);  in aspeed_adc_compensation()
251 		adc_raw += readw(data->base + aspeed_adc_iio_channels[0].address);  in aspeed_adc_compensation()
254 	data->cv = BIT(ASPEED_RESOLUTION_BITS - 1) - adc_raw;  in aspeed_adc_compensation()
256 	       data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_compensation()
257 	dev_dbg(data->dev, "Compensating value = %d\n", data->cv);  in aspeed_adc_compensation()
266 	if (rate < data->model_data->min_sampling_rate ||  in aspeed_adc_set_sampling_rate()
267 	    rate > data->model_data->max_sampling_rate)  in aspeed_adc_set_sampling_rate()
268 		return -EINVAL;  in aspeed_adc_set_sampling_rate()
270 	clk_set_rate(data->clk_scaler->clk, rate * ASPEED_CLOCKS_PER_SAMPLE);  in aspeed_adc_set_sampling_rate()
271 	rate = clk_get_rate(data->clk_scaler->clk);  in aspeed_adc_set_sampling_rate()
272 	data->sample_period_ns = DIV_ROUND_UP_ULL(  in aspeed_adc_set_sampling_rate()
274 	dev_dbg(data->dev, "Adc clock = %d sample period = %d ns", rate,  in aspeed_adc_set_sampling_rate()
275 		data->sample_period_ns);  in aspeed_adc_set_sampling_rate()
289 		if (data->battery_sensing && chan->channel == 7) {  in aspeed_adc_read_raw()
291 				readl(data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_read_raw()
296 			       data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_read_raw()
302 			*val = readw(data->base + chan->address);  in aspeed_adc_read_raw()
303 			*val = (*val * data->battery_mode_gain.mult) /  in aspeed_adc_read_raw()
304 			       data->battery_mode_gain.div;  in aspeed_adc_read_raw()
307 			       data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_read_raw()
309 			*val = readw(data->base + chan->address);  in aspeed_adc_read_raw()
313 		if (data->battery_sensing && chan->channel == 7)  in aspeed_adc_read_raw()
314 			*val = (data->cv * data->battery_mode_gain.mult) /  in aspeed_adc_read_raw()
315 			       data->battery_mode_gain.div;  in aspeed_adc_read_raw()
317 			*val = data->cv;  in aspeed_adc_read_raw()
321 		*val = data->vref_mv;  in aspeed_adc_read_raw()
326 		*val = clk_get_rate(data->clk_scaler->clk) /  in aspeed_adc_read_raw()
331 		return -EINVAL;  in aspeed_adc_read_raw()
351 		return -EPERM;  in aspeed_adc_write_raw()
354 		return -EINVAL;  in aspeed_adc_write_raw()
365 		return -EINVAL;  in aspeed_adc_reg_access()
367 	*readval = readl(data->base + reg);  in aspeed_adc_reg_access()
404 	       priv_data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_power_down()
420 	if (data->model_data->vref_fixed_mv) {  in aspeed_adc_vref_config()
421 		data->vref_mv = data->model_data->vref_fixed_mv;  in aspeed_adc_vref_config()
425 		readl(data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_vref_config()
426 	data->regulator = devm_regulator_get_optional(data->dev, "vref");  in aspeed_adc_vref_config()
427 	if (!IS_ERR(data->regulator)) {  in aspeed_adc_vref_config()
428 		ret = regulator_enable(data->regulator);  in aspeed_adc_vref_config()
432 			data->dev, aspeed_adc_reg_disable, data->regulator);  in aspeed_adc_vref_config()
435 		data->vref_mv = regulator_get_voltage(data->regulator);  in aspeed_adc_vref_config()
437 		data->vref_mv /= 1000;  in aspeed_adc_vref_config()
438 		if ((data->vref_mv >= 1550) && (data->vref_mv <= 2700))  in aspeed_adc_vref_config()
443 			data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_vref_config()
444 		else if ((data->vref_mv >= 900) && (data->vref_mv <= 1650))  in aspeed_adc_vref_config()
449 			data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_vref_config()
451 			dev_err(data->dev, "Regulator voltage %d not support",  in aspeed_adc_vref_config()
452 				data->vref_mv);  in aspeed_adc_vref_config()
453 			return -EOPNOTSUPP;  in aspeed_adc_vref_config()
456 		if (PTR_ERR(data->regulator) != -ENODEV)  in aspeed_adc_vref_config()
457 			return PTR_ERR(data->regulator);  in aspeed_adc_vref_config()
458 		data->vref_mv = 2500000;  in aspeed_adc_vref_config()
459 		of_property_read_u32(data->dev->of_node,  in aspeed_adc_vref_config()
460 				     "aspeed,int-vref-microvolt",  in aspeed_adc_vref_config()
461 				     &data->vref_mv);  in aspeed_adc_vref_config()
463 		data->vref_mv /= 1000;  in aspeed_adc_vref_config()
464 		if (data->vref_mv == 2500)  in aspeed_adc_vref_config()
468 			data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_vref_config()
469 		else if (data->vref_mv == 1200)  in aspeed_adc_vref_config()
473 			data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_vref_config()
475 			dev_err(data->dev, "Voltage %d not support", data->vref_mv);  in aspeed_adc_vref_config()
476 			return -EOPNOTSUPP;  in aspeed_adc_vref_config()
492 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*data));  in aspeed_adc_probe()
494 		return -ENOMEM;  in aspeed_adc_probe()
497 	data->dev = &pdev->dev;  in aspeed_adc_probe()
498 	data->model_data = of_device_get_match_data(&pdev->dev);  in aspeed_adc_probe()
501 	data->base = devm_platform_ioremap_resource(pdev, 0);  in aspeed_adc_probe()
502 	if (IS_ERR(data->base))  in aspeed_adc_probe()
503 		return PTR_ERR(data->base);  in aspeed_adc_probe()
506 	spin_lock_init(&data->clk_lock);  in aspeed_adc_probe()
508 		 of_clk_get_parent_name(pdev->dev.of_node, 0));  in aspeed_adc_probe()
509 	snprintf(clk_name, ARRAY_SIZE(clk_name), "%s-fixed-div",  in aspeed_adc_probe()
510 		 data->model_data->model_name);  in aspeed_adc_probe()
511 	data->fixed_div_clk = clk_hw_register_fixed_factor(  in aspeed_adc_probe()
512 		&pdev->dev, clk_name, clk_parent_name, 0, 1, 2);  in aspeed_adc_probe()
513 	if (IS_ERR(data->fixed_div_clk))  in aspeed_adc_probe()
514 		return PTR_ERR(data->fixed_div_clk);  in aspeed_adc_probe()
516 	ret = devm_add_action_or_reset(data->dev,  in aspeed_adc_probe()
518 				       data->fixed_div_clk);  in aspeed_adc_probe()
523 	if (data->model_data->need_prescaler) {  in aspeed_adc_probe()
524 		snprintf(clk_name, ARRAY_SIZE(clk_name), "%s-prescaler",  in aspeed_adc_probe()
525 			 data->model_data->model_name);  in aspeed_adc_probe()
526 		data->clk_prescaler = devm_clk_hw_register_divider(  in aspeed_adc_probe()
527 			&pdev->dev, clk_name, clk_parent_name, 0,  in aspeed_adc_probe()
528 			data->base + ASPEED_REG_CLOCK_CONTROL, 17, 15, 0,  in aspeed_adc_probe()
529 			&data->clk_lock);  in aspeed_adc_probe()
530 		if (IS_ERR(data->clk_prescaler))  in aspeed_adc_probe()
531 			return PTR_ERR(data->clk_prescaler);  in aspeed_adc_probe()
540 	snprintf(clk_name, ARRAY_SIZE(clk_name), "%s-scaler",  in aspeed_adc_probe()
541 		 data->model_data->model_name);  in aspeed_adc_probe()
542 	data->clk_scaler = devm_clk_hw_register_divider(  in aspeed_adc_probe()
543 		&pdev->dev, clk_name, clk_parent_name, scaler_flags,  in aspeed_adc_probe()
544 		data->base + ASPEED_REG_CLOCK_CONTROL, 0,  in aspeed_adc_probe()
545 		data->model_data->scaler_bit_width,  in aspeed_adc_probe()
546 		data->model_data->need_prescaler ? CLK_DIVIDER_ONE_BASED : 0,  in aspeed_adc_probe()
547 		&data->clk_lock);  in aspeed_adc_probe()
548 	if (IS_ERR(data->clk_scaler))  in aspeed_adc_probe()
549 		return PTR_ERR(data->clk_scaler);  in aspeed_adc_probe()
551 	data->rst = devm_reset_control_get_shared(&pdev->dev, NULL);  in aspeed_adc_probe()
552 	if (IS_ERR(data->rst)) {  in aspeed_adc_probe()
553 		dev_err(&pdev->dev,  in aspeed_adc_probe()
555 		return PTR_ERR(data->rst);  in aspeed_adc_probe()
557 	reset_control_deassert(data->rst);  in aspeed_adc_probe()
559 	ret = devm_add_action_or_reset(data->dev, aspeed_adc_reset_assert,  in aspeed_adc_probe()
560 				       data->rst);  in aspeed_adc_probe()
572 	if (of_find_property(data->dev->of_node, "aspeed,battery-sensing",  in aspeed_adc_probe()
574 		if (data->model_data->bat_sense_sup) {  in aspeed_adc_probe()
575 			data->battery_sensing = 1;  in aspeed_adc_probe()
576 			if (readl(data->base + ASPEED_REG_ENGINE_CONTROL) &  in aspeed_adc_probe()
578 				data->battery_mode_gain.mult = 3;  in aspeed_adc_probe()
579 				data->battery_mode_gain.div = 1;  in aspeed_adc_probe()
581 				data->battery_mode_gain.mult = 3;  in aspeed_adc_probe()
582 				data->battery_mode_gain.div = 2;  in aspeed_adc_probe()
585 			dev_warn(&pdev->dev,  in aspeed_adc_probe()
586 				 "Failed to enable battery-sensing mode\n");  in aspeed_adc_probe()
589 	ret = clk_prepare_enable(data->clk_scaler->clk);  in aspeed_adc_probe()
592 	ret = devm_add_action_or_reset(data->dev,  in aspeed_adc_probe()
594 				       data->clk_scaler->clk);  in aspeed_adc_probe()
603 		readl(data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_probe()
609 	       data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_probe()
611 	ret = devm_add_action_or_reset(data->dev, aspeed_adc_power_down,  in aspeed_adc_probe()
616 	if (data->model_data->wait_init_sequence) {  in aspeed_adc_probe()
618 		ret = readl_poll_timeout(data->base + ASPEED_REG_ENGINE_CONTROL,  in aspeed_adc_probe()
631 		readl(data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_probe()
634 	       data->base + ASPEED_REG_ENGINE_CONTROL);  in aspeed_adc_probe()
636 	indio_dev->name = data->model_data->model_name;  in aspeed_adc_probe()
637 	indio_dev->info = &aspeed_adc_iio_info;  in aspeed_adc_probe()
638 	indio_dev->modes = INDIO_DIRECT_MODE;  in aspeed_adc_probe()
639 	indio_dev->channels = data->battery_sensing ?  in aspeed_adc_probe()
642 	indio_dev->num_channels = data->model_data->num_channels;  in aspeed_adc_probe()
644 	ret = devm_iio_device_register(data->dev, indio_dev);  in aspeed_adc_probe()
664 	.model_name = "ast2400-adc",
674 	.model_name = "ast2500-adc",
686 	.model_name = "ast2600-adc0",
697 	.model_name = "ast2600-adc1",
708 	{ .compatible = "aspeed,ast2400-adc", .data = &ast2400_model_data },
709 	{ .compatible = "aspeed,ast2500-adc", .data = &ast2500_model_data },
710 	{ .compatible = "aspeed,ast2600-adc0", .data = &ast2600_adc0_model_data },
711 	{ .compatible = "aspeed,ast2600-adc1", .data = &ast2600_adc1_model_data },