1 // SPDX-License-Identifier: GPL-2.0+
3  *  Driver for Analog Devices (Linear Technology) LT3651 charger IC.
8 #include <linux/gpio/consumer.h>
19 	struct power_supply *charger;  member
28 	struct power_supply *charger = devid;  in lt3651_charger_irq()  local
30 	power_supply_changed(charger);  in lt3651_charger_irq()
48 		if (!lt3651_charger->chrg_gpio) {  in lt3651_charger_get_property()
49 			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;  in lt3651_charger_get_property()
52 		if (gpiod_get_value(lt3651_charger->chrg_gpio))  in lt3651_charger_get_property()
53 			val->intval = POWER_SUPPLY_STATUS_CHARGING;  in lt3651_charger_get_property()
55 			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;  in lt3651_charger_get_property()
58 		val->intval = gpiod_get_value(lt3651_charger->acpr_gpio);  in lt3651_charger_get_property()
61 		if (!lt3651_charger->fault_gpio) {  in lt3651_charger_get_property()
62 			val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;  in lt3651_charger_get_property()
65 		if (!gpiod_get_value(lt3651_charger->fault_gpio)) {  in lt3651_charger_get_property()
66 			val->intval = POWER_SUPPLY_HEALTH_GOOD;  in lt3651_charger_get_property()
73 		if (!lt3651_charger->chrg_gpio) {  in lt3651_charger_get_property()
74 			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;  in lt3651_charger_get_property()
77 		val->intval = gpiod_get_value(lt3651_charger->chrg_gpio) ?  in lt3651_charger_get_property()
82 		return -EINVAL;  in lt3651_charger_get_property()
101 	lt3651_charger = devm_kzalloc(&pdev->dev, sizeof(*lt3651_charger),  in lt3651_charger_probe()
104 		return -ENOMEM;  in lt3651_charger_probe()
106 	lt3651_charger->acpr_gpio = devm_gpiod_get(&pdev->dev,  in lt3651_charger_probe()
108 	if (IS_ERR(lt3651_charger->acpr_gpio)) {  in lt3651_charger_probe()
109 		ret = PTR_ERR(lt3651_charger->acpr_gpio);  in lt3651_charger_probe()
110 		dev_err(&pdev->dev, "Failed to acquire acpr GPIO: %d\n", ret);  in lt3651_charger_probe()
113 	lt3651_charger->fault_gpio = devm_gpiod_get_optional(&pdev->dev,  in lt3651_charger_probe()
115 	if (IS_ERR(lt3651_charger->fault_gpio)) {  in lt3651_charger_probe()
116 		ret = PTR_ERR(lt3651_charger->fault_gpio);  in lt3651_charger_probe()
117 		dev_err(&pdev->dev, "Failed to acquire fault GPIO: %d\n", ret);  in lt3651_charger_probe()
120 	lt3651_charger->chrg_gpio = devm_gpiod_get_optional(&pdev->dev,  in lt3651_charger_probe()
122 	if (IS_ERR(lt3651_charger->chrg_gpio)) {  in lt3651_charger_probe()
123 		ret = PTR_ERR(lt3651_charger->chrg_gpio);  in lt3651_charger_probe()
124 		dev_err(&pdev->dev, "Failed to acquire chrg GPIO: %d\n", ret);  in lt3651_charger_probe()
128 	charger_desc = &lt3651_charger->charger_desc;  in lt3651_charger_probe()
129 	charger_desc->name = pdev->dev.of_node->name;  in lt3651_charger_probe()
130 	charger_desc->type = POWER_SUPPLY_TYPE_MAINS;  in lt3651_charger_probe()
131 	charger_desc->properties = lt3651_charger_properties;  in lt3651_charger_probe()
132 	charger_desc->num_properties = ARRAY_SIZE(lt3651_charger_properties);  in lt3651_charger_probe()
133 	charger_desc->get_property = lt3651_charger_get_property;  in lt3651_charger_probe()
134 	psy_cfg.of_node = pdev->dev.of_node;  in lt3651_charger_probe()
137 	lt3651_charger->charger = devm_power_supply_register(&pdev->dev,  in lt3651_charger_probe()
139 	if (IS_ERR(lt3651_charger->charger)) {  in lt3651_charger_probe()
140 		ret = PTR_ERR(lt3651_charger->charger);  in lt3651_charger_probe()
141 		dev_err(&pdev->dev, "Failed to register power supply: %d\n",  in lt3651_charger_probe()
147 	 * Acquire IRQs for the GPIO pins if possible. If the system does not  in lt3651_charger_probe()
151 	if (lt3651_charger->acpr_gpio) {  in lt3651_charger_probe()
152 		ret = gpiod_to_irq(lt3651_charger->acpr_gpio);  in lt3651_charger_probe()
154 			ret = devm_request_any_context_irq(&pdev->dev, ret,  in lt3651_charger_probe()
157 				dev_name(&pdev->dev), lt3651_charger->charger);  in lt3651_charger_probe()
159 			dev_warn(&pdev->dev, "Failed to request acpr irq\n");  in lt3651_charger_probe()
161 	if (lt3651_charger->fault_gpio) {  in lt3651_charger_probe()
162 		ret = gpiod_to_irq(lt3651_charger->fault_gpio);  in lt3651_charger_probe()
164 			ret = devm_request_any_context_irq(&pdev->dev, ret,  in lt3651_charger_probe()
167 				dev_name(&pdev->dev), lt3651_charger->charger);  in lt3651_charger_probe()
169 			dev_warn(&pdev->dev, "Failed to request fault irq\n");  in lt3651_charger_probe()
171 	if (lt3651_charger->chrg_gpio) {  in lt3651_charger_probe()
172 		ret = gpiod_to_irq(lt3651_charger->chrg_gpio);  in lt3651_charger_probe()
174 			ret = devm_request_any_context_irq(&pdev->dev, ret,  in lt3651_charger_probe()
177 				dev_name(&pdev->dev), lt3651_charger->charger);  in lt3651_charger_probe()
179 			dev_warn(&pdev->dev, "Failed to request chrg irq\n");  in lt3651_charger_probe()
188 	{ .compatible = "lltc,ltc3651-charger" }, /* DEPRECATED */
189 	{ .compatible = "lltc,lt3651-charger" },
197 		.name = "lt3651-charger",
205 MODULE_DESCRIPTION("Driver for LT3651 charger");
207 MODULE_ALIAS("platform:lt3651-charger");