1 // SPDX-License-Identifier: GPL-2.0
6 // Battery charger driver for MAXIM 77650/77651 charger/power-supply.
28 /* Charger is in fast-charge constant current mode. */
30 /* Charger is in JEITA modified fast-charge constant-current mode. */
32 /* Charger is in fast-charge constant-voltage mode. */
34 /* Charger is in JEITA modified fast-charge constant-voltage mode. */
36 /* Charger is in top-off mode. */
38 /* Charger is in JEITA modified top-off mode. */
46 /* Charger is suspended due to a fast-charge timer fault. */
80 static const unsigned int max77650_charger_vchgin_min_table[] = {
84 static const unsigned int max77650_charger_ichgin_lim_table[] = {
88 static int max77650_charger_set_vchgin_min(struct max77650_charger_data *chg,  in max77650_charger_set_vchgin_min()  argument
89 					   unsigned int val)  in max77650_charger_set_vchgin_min()
91 	int i, rv;  in max77650_charger_set_vchgin_min()
95 			rv = regmap_update_bits(chg->map,  in max77650_charger_set_vchgin_min()
106 	return -EINVAL;  in max77650_charger_set_vchgin_min()
109 static int max77650_charger_set_ichgin_lim(struct max77650_charger_data *chg,  in max77650_charger_set_ichgin_lim()  argument
110 					   unsigned int val)  in max77650_charger_set_ichgin_lim()
112 	int i, rv;  in max77650_charger_set_ichgin_lim()
116 			rv = regmap_update_bits(chg->map,  in max77650_charger_set_ichgin_lim()
127 	return -EINVAL;  in max77650_charger_set_ichgin_lim()
130 static int max77650_charger_enable(struct max77650_charger_data *chg)  in max77650_charger_enable()  argument
132 	int rv;  in max77650_charger_enable()
134 	rv = regmap_update_bits(chg->map,  in max77650_charger_enable()
139 		dev_err(chg->dev, "unable to enable the charger: %d\n", rv);  in max77650_charger_enable()
144 static void max77650_charger_disable(struct max77650_charger_data *chg)  in max77650_charger_disable()  argument
146 	int rv;  in max77650_charger_disable()
148 	rv = regmap_update_bits(chg->map,  in max77650_charger_disable()
153 		dev_err(chg->dev, "unable to disable the charger: %d\n", rv);  in max77650_charger_disable()
156 static irqreturn_t max77650_charger_check_status(int irq, void *data)  in max77650_charger_check_status()
158 	struct max77650_charger_data *chg = data;  in max77650_charger_check_status()  local
159 	int rv, reg;  in max77650_charger_check_status()
161 	rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, &reg);  in max77650_charger_check_status()
163 		dev_err(chg->dev,  in max77650_charger_check_status()
170 		dev_err(chg->dev, "undervoltage lockout detected, disabling charger\n");  in max77650_charger_check_status()
171 		max77650_charger_disable(chg);  in max77650_charger_check_status()
174 		dev_err(chg->dev, "overvoltage lockout detected, disabling charger\n");  in max77650_charger_check_status()
175 		max77650_charger_disable(chg);  in max77650_charger_check_status()
178 		max77650_charger_enable(chg);  in max77650_charger_check_status()
181 		/* May be 0x10 - debouncing */  in max77650_charger_check_status()
188 static int max77650_charger_get_property(struct power_supply *psy,  in max77650_charger_get_property()
192 	struct max77650_charger_data *chg = power_supply_get_drvdata(psy);  in max77650_charger_get_property()  local
193 	int rv, reg;  in max77650_charger_get_property()
197 		rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, &reg);  in max77650_charger_get_property()
202 			val->intval = POWER_SUPPLY_STATUS_CHARGING;  in max77650_charger_get_property()
211 			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;  in max77650_charger_get_property()
220 			val->intval = POWER_SUPPLY_STATUS_CHARGING;  in max77650_charger_get_property()
223 			val->intval = POWER_SUPPLY_STATUS_FULL;  in max77650_charger_get_property()
226 			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;  in max77650_charger_get_property()
230 		rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, &reg);  in max77650_charger_get_property()
234 		val->intval = MAX77650_CHARGER_CHG_CHARGING(reg);  in max77650_charger_get_property()
237 		rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, &reg);  in max77650_charger_get_property()
242 			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;  in max77650_charger_get_property()
252 			val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;  in max77650_charger_get_property()
256 			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;  in max77650_charger_get_property()
259 			val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;  in max77650_charger_get_property()
263 		return -EINVAL;  in max77650_charger_get_property()
277 static int max77650_charger_probe(struct platform_device *pdev)  in max77650_charger_probe()
280 	struct max77650_charger_data *chg;  in max77650_charger_probe()  local
283 	int rv, chg_irq, chgin_irq;  in max77650_charger_probe()
284 	unsigned int prop;  in max77650_charger_probe()
286 	dev = &pdev->dev;  in max77650_charger_probe()
287 	parent = dev->parent;  in max77650_charger_probe()
289 	chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);  in max77650_charger_probe()
290 	if (!chg)  in max77650_charger_probe()
291 		return -ENOMEM;  in max77650_charger_probe()
293 	platform_set_drvdata(pdev, chg);  in max77650_charger_probe()
295 	chg->map = dev_get_regmap(parent, NULL);  in max77650_charger_probe()
296 	if (!chg->map)  in max77650_charger_probe()
297 		return -ENODEV;  in max77650_charger_probe()
299 	chg->dev = dev;  in max77650_charger_probe()
301 	pscfg.of_node = dev->of_node;  in max77650_charger_probe()
302 	pscfg.drv_data = chg;  in max77650_charger_probe()
304 	chg_irq = platform_get_irq_byname(pdev, "CHG");  in max77650_charger_probe()
314 					  IRQF_ONESHOT, "chg", chg);  in max77650_charger_probe()
320 					  IRQF_ONESHOT, "chgin", chg);  in max77650_charger_probe()
329 	rv = of_property_read_u32(dev->of_node,  in max77650_charger_probe()
330 				  "input-voltage-min-microvolt", &prop);  in max77650_charger_probe()
332 		rv = max77650_charger_set_vchgin_min(chg, prop);  in max77650_charger_probe()
337 	rv = of_property_read_u32(dev->of_node,  in max77650_charger_probe()
338 				  "input-current-limit-microamp", &prop);  in max77650_charger_probe()
340 		rv = max77650_charger_set_ichgin_lim(chg, prop);  in max77650_charger_probe()
345 	return max77650_charger_enable(chg);  in max77650_charger_probe()
350 	struct max77650_charger_data *chg = platform_get_drvdata(pdev);  in max77650_charger_remove()  local
352 	max77650_charger_disable(chg);  in max77650_charger_remove()
356 	{ .compatible = "maxim,max77650-charger" },
363 		.name = "max77650-charger",
374 MODULE_ALIAS("platform:max77650-charger");