1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * This adds support for sbs-charger compilant chips as defined here:
6  * http://sbs-forum.org/specs/sbc110.pdf
8  * Implemetation based on sbs-battery.c
51 	reg = chip->last_state;  in sbs_get_property()
55 		val->intval = !!(reg & SBS_CHARGER_STATUS_BATTERY_PRESENT);  in sbs_get_property()
59 		val->intval = !!(reg & SBS_CHARGER_STATUS_AC_PRESENT);  in sbs_get_property()
63 		val->intval = POWER_SUPPLY_STATUS_UNKNOWN;  in sbs_get_property()
66 			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;  in sbs_get_property()
69 			val->intval = POWER_SUPPLY_STATUS_CHARGING;  in sbs_get_property()
71 			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;  in sbs_get_property()
77 			val->intval = POWER_SUPPLY_HEALTH_COLD;  in sbs_get_property()
79 			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;  in sbs_get_property()
81 			val->intval = POWER_SUPPLY_HEALTH_GOOD;  in sbs_get_property()
86 		return -EINVAL;  in sbs_get_property()
97 	ret = regmap_read(chip->regmap, SBS_CHARGER_REG_STATUS, &reg);  in sbs_check_state()
98 	if (!ret && reg != chip->last_state) {  in sbs_check_state()
99 		chip->last_state = reg;  in sbs_check_state()
100 		power_supply_changed(chip->power_supply);  in sbs_check_state()
113 	schedule_delayed_work(&chip->work,  in sbs_delayed_work()
159 	.name = "sbs-charger",
173 	chip = devm_kzalloc(&client->dev, sizeof(struct sbs_info), GFP_KERNEL);  in sbs_probe()
175 		return -ENOMEM;  in sbs_probe()
177 	chip->client = client;  in sbs_probe()
178 	psy_cfg.of_node = client->dev.of_node;  in sbs_probe()
183 	chip->regmap = devm_regmap_init_i2c(client, &sbs_regmap);  in sbs_probe()
184 	if (IS_ERR(chip->regmap))  in sbs_probe()
185 		return PTR_ERR(chip->regmap);  in sbs_probe()
189 	 * to the battery.  in sbs_probe()
191 	ret = regmap_read(chip->regmap, SBS_CHARGER_REG_STATUS, &val);  in sbs_probe()
193 		dev_err(&client->dev, "Failed to get device status\n");  in sbs_probe()
196 	chip->last_state = val;  in sbs_probe()
198 	chip->power_supply = devm_power_supply_register(&client->dev, &sbs_desc,  in sbs_probe()
200 	if (IS_ERR(chip->power_supply)) {  in sbs_probe()
201 		dev_err(&client->dev, "Failed to register power supply\n");  in sbs_probe()
202 		return PTR_ERR(chip->power_supply);  in sbs_probe()
206 	 * The sbs-charger spec doesn't impose the use of an interrupt. So in  in sbs_probe()
210 	if (client->irq) {  in sbs_probe()
211 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in sbs_probe()
214 					dev_name(&client->dev), chip);  in sbs_probe()
216 			dev_err(&client->dev, "Failed to request irq, %d\n", ret);  in sbs_probe()
220 		INIT_DELAYED_WORK(&chip->work, sbs_delayed_work);  in sbs_probe()
221 		schedule_delayed_work(&chip->work,  in sbs_probe()
225 	dev_info(&client->dev,  in sbs_probe()
226 		 "%s: smart charger device registered\n", client->name);  in sbs_probe()
235 	cancel_delayed_work_sync(&chip->work);  in sbs_remove()
242 	{ .compatible = "sbs,sbs-charger" },
249 	{ "sbs-charger", 0 },
259 		.name	= "sbs-charger",
266 MODULE_DESCRIPTION("SBS smart charger driver");