1 // SPDX-License-Identifier: GPL-2.0
6 // Battery charger driver for MAXIM 77650/77651 charger/power-supply.
10 #include <linux/mfd/max77650.h>
24 /* Charger is OFF. */
26 /* Charger is in prequalification mode. */
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. */
40 /* Charger is done. */
42 /* Charger is JEITA modified done. */
44 /* Charger is suspended due to a prequalification timer fault. */
46 /* Charger is suspended due to a fast-charge timer fault. */
48 /* Charger is suspended due to a battery temperature fault. */
95 			rv = regmap_update_bits(chg->map,  in max77650_charger_set_vchgin_min()
106 	return -EINVAL;  in max77650_charger_set_vchgin_min()
116 			rv = regmap_update_bits(chg->map,  in max77650_charger_set_ichgin_lim()
127 	return -EINVAL;  in max77650_charger_set_ichgin_lim()
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()
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()
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()
164 			"unable to read the charger status: %d\n", rv);  in max77650_charger_check_status()
170 		dev_err(chg->dev, "undervoltage lockout detected, disabling charger\n");  in max77650_charger_check_status()
174 		dev_err(chg->dev, "overvoltage lockout detected, disabling charger\n");  in max77650_charger_check_status()
181 		/* May be 0x10 - debouncing */  in max77650_charger_check_status()
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()
270 	.name		= "max77650",
286 	dev = &pdev->dev;  in max77650_charger_probe()
287 	parent = dev->parent;  in max77650_charger_probe()
291 		return -ENOMEM;  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()
329 	rv = of_property_read_u32(dev->of_node,  in max77650_charger_probe()
330 				  "input-voltage-min-microvolt", &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()
356 	{ .compatible = "maxim,max77650-charger" },
363 		.name = "max77650-charger",
371 MODULE_DESCRIPTION("MAXIM 77650/77651 charger driver");
374 MODULE_ALIAS("platform:max77650-charger");