1 // SPDX-License-Identifier: GPL-2.0-only
3  * Power supply driver for the Active-semi ACT8945A PMIC
16 #include <linux/gpio/consumer.h>
19 static const char *act8945a_charger_manufacturer = "Active-semi";
22  * ACT8945A Charger Register Map
209 static int act8945a_get_capacity_level(struct act8945a_charger *charger,  in act8945a_get_capacity_level()  argument
214 	int lbo_level = gpiod_get_value(charger->lbo_gpio);  in act8945a_get_capacity_level()
268  * Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205
276 static int act8945a_get_current_max(struct act8945a_charger *charger,  in act8945a_get_current_max()  argument
282 	int chgin_level = gpiod_get_value(charger->chglev_gpio);  in act8945a_get_current_max()
346 	struct act8945a_charger *charger = power_supply_get_drvdata(psy);  in act8945a_charger_get_property()  local
347 	struct regmap *regmap = charger->regmap;  in act8945a_charger_get_property()
352 		ret = act8945a_get_charger_state(regmap, &val->intval);  in act8945a_charger_get_property()
355 		ret = act8945a_get_charge_type(regmap, &val->intval);  in act8945a_charger_get_property()
358 		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;  in act8945a_charger_get_property()
361 		ret = act8945a_get_battery_health(regmap, &val->intval);  in act8945a_charger_get_property()
364 		ret = act8945a_get_capacity_level(charger,  in act8945a_charger_get_property()
365 						  regmap, &val->intval);  in act8945a_charger_get_property()
368 		ret = act8945a_get_current_max(charger,  in act8945a_charger_get_property()
369 					       regmap, &val->intval);  in act8945a_charger_get_property()
372 		val->strval = act8945a_charger_model;  in act8945a_charger_get_property()
375 		val->strval = act8945a_charger_manufacturer;  in act8945a_charger_get_property()
378 		return -EINVAL;  in act8945a_charger_get_property()
384 static int act8945a_enable_interrupt(struct act8945a_charger *charger)  in act8945a_enable_interrupt()  argument
386 	struct regmap *regmap = charger->regmap;  in act8945a_enable_interrupt()
407 static unsigned int act8945a_set_supply_type(struct act8945a_charger *charger,  in act8945a_set_supply_type()  argument
413 	ret = regmap_read(charger->regmap, ACT8945A_APCH_STATUS, &status);  in act8945a_set_supply_type()
417 	ret = regmap_read(charger->regmap, ACT8945A_APCH_STATE, &state);  in act8945a_set_supply_type()
435 	struct act8945a_charger *charger =  in act8945a_work()  local
438 	act8945a_set_supply_type(charger, &charger->desc.type);  in act8945a_work()
440 	power_supply_changed(charger->psy);  in act8945a_work()
445 	struct act8945a_charger *charger = dev_id;  in act8945a_status_changed()  local
447 	if (charger->init_done)  in act8945a_status_changed()
448 		schedule_work(&charger->work);  in act8945a_status_changed()
458 				   struct act8945a_charger *charger)  in act8945a_charger_config()  argument
460 	struct device_node *np = dev->of_node;  in act8945a_charger_config()
461 	struct regmap *regmap = charger->regmap;  in act8945a_charger_config()
472 		dev_err(dev, "no charger of node\n");  in act8945a_charger_config()
473 		return -EINVAL;  in act8945a_charger_config()
485 	charger->lbo_gpio = devm_gpiod_get_optional(dev, "active-semi,lbo",  in act8945a_charger_config()
487 	if (IS_ERR(charger->lbo_gpio)) {  in act8945a_charger_config()
488 		err = PTR_ERR(charger->lbo_gpio);  in act8945a_charger_config()
489 		dev_err(dev, "unable to claim gpio \"lbo\": %d\n", err);  in act8945a_charger_config()
493 	ret = devm_request_irq(dev, gpiod_to_irq(charger->lbo_gpio),  in act8945a_charger_config()
496 			       "act8945a_lbo_detect", charger);  in act8945a_charger_config()
498 		dev_info(dev, "failed to request gpio \"lbo\" IRQ\n");  in act8945a_charger_config()
500 	charger->chglev_gpio = devm_gpiod_get_optional(dev,  in act8945a_charger_config()
501 						       "active-semi,chglev",  in act8945a_charger_config()
503 	if (IS_ERR(charger->chglev_gpio)) {  in act8945a_charger_config()
504 		err = PTR_ERR(charger->chglev_gpio);  in act8945a_charger_config()
505 		dev_err(dev, "unable to claim gpio \"chglev\": %d\n", err);  in act8945a_charger_config()
510 				 "active-semi,input-voltage-threshold-microvolt",  in act8945a_charger_config()
515 				 "active-semi,precondition-timeout",  in act8945a_charger_config()
519 	if (of_property_read_u32(np, "active-semi,total-timeout",  in act8945a_charger_config()
576 	struct act8945a_charger *charger;  in act8945a_charger_probe()  local
580 	charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);  in act8945a_charger_probe()
581 	if (!charger)  in act8945a_charger_probe()
582 		return -ENOMEM;  in act8945a_charger_probe()
584 	charger->regmap = dev_get_regmap(pdev->dev.parent, NULL);  in act8945a_charger_probe()
585 	if (!charger->regmap) {  in act8945a_charger_probe()
586 		dev_err(&pdev->dev, "Parent did not provide regmap\n");  in act8945a_charger_probe()
587 		return -EINVAL;  in act8945a_charger_probe()
590 	ret = act8945a_charger_config(&pdev->dev, charger);  in act8945a_charger_probe()
594 	irq = of_irq_get(pdev->dev.of_node, 0);  in act8945a_charger_probe()
596 		dev_err(&pdev->dev, "failed to find IRQ number\n");  in act8945a_charger_probe()
597 		return irq ?: -ENXIO;  in act8945a_charger_probe()
600 	ret = devm_request_irq(&pdev->dev, irq, act8945a_status_changed,  in act8945a_charger_probe()
602 			       charger);  in act8945a_charger_probe()
604 		dev_err(&pdev->dev, "failed to request nIRQ pin IRQ\n");  in act8945a_charger_probe()
608 	charger->desc.name = "act8945a-charger";  in act8945a_charger_probe()
609 	charger->desc.get_property = act8945a_charger_get_property;  in act8945a_charger_probe()
610 	charger->desc.properties = act8945a_charger_props;  in act8945a_charger_probe()
611 	charger->desc.num_properties = ARRAY_SIZE(act8945a_charger_props);  in act8945a_charger_probe()
613 	ret = act8945a_set_supply_type(charger, &charger->desc.type);  in act8945a_charger_probe()
615 		return -EINVAL;  in act8945a_charger_probe()
617 	psy_cfg.of_node	= pdev->dev.of_node;  in act8945a_charger_probe()
618 	psy_cfg.drv_data = charger;  in act8945a_charger_probe()
620 	charger->psy = devm_power_supply_register(&pdev->dev,  in act8945a_charger_probe()
621 						  &charger->desc,  in act8945a_charger_probe()
623 	if (IS_ERR(charger->psy)) {  in act8945a_charger_probe()
624 		dev_err(&pdev->dev, "failed to register power supply\n");  in act8945a_charger_probe()
625 		return PTR_ERR(charger->psy);  in act8945a_charger_probe()
628 	platform_set_drvdata(pdev, charger);  in act8945a_charger_probe()
630 	INIT_WORK(&charger->work, act8945a_work);  in act8945a_charger_probe()
632 	ret = act8945a_enable_interrupt(charger);  in act8945a_charger_probe()
634 		return -EIO;  in act8945a_charger_probe()
636 	charger->init_done = true;  in act8945a_charger_probe()
643 	struct act8945a_charger *charger = platform_get_drvdata(pdev);  in act8945a_charger_remove()  local
645 	charger->init_done = false;  in act8945a_charger_remove()
646 	cancel_work_sync(&charger->work);  in act8945a_charger_remove()
653 		.name = "act8945a-charger",
660 MODULE_DESCRIPTION("Active-semi ACT8945A ActivePath charger driver");