power/supply/sbs-charger.c

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
21 #include <linux/devm-helpers.h>
50 	reg = chip->last_state;  in sbs_get_property()
54 		val->intval = !!(reg & SBS_CHARGER_STATUS_BATTERY_PRESENT);  in sbs_get_property()
58 		val->intval = !!(reg & SBS_CHARGER_STATUS_AC_PRESENT);  in sbs_get_property()
62 		val->intval = POWER_SUPPLY_STATUS_UNKNOWN;  in sbs_get_property()
65 			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;  in sbs_get_property()
68 			val->intval = POWER_SUPPLY_STATUS_CHARGING;  in sbs_get_property()
70 			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;  in sbs_get_property()
76 			val->intval = POWER_SUPPLY_HEALTH_COLD;  in sbs_get_property()
78 			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;  in sbs_get_property()
80 			val->intval = POWER_SUPPLY_HEALTH_GOOD;  in sbs_get_property()
85 		return -EINVAL;  in sbs_get_property()
96 	ret = regmap_read(chip->regmap, SBS_CHARGER_REG_STATUS, &reg);  in sbs_check_state()
97 	if (!ret && reg != chip->last_state) {  in sbs_check_state()
98 		chip->last_state = reg;  in sbs_check_state()
99 		power_supply_changed(chip->power_supply);  in sbs_check_state()
112 	schedule_delayed_work(&chip->work,  in sbs_delayed_work()
158 	.name = "sbs-charger",
171 	chip = devm_kzalloc(&client->dev, sizeof(struct sbs_info), GFP_KERNEL);  in sbs_probe()
173 		return -ENOMEM;  in sbs_probe()
175 	chip->client = client;  in sbs_probe()
176 	psy_cfg.of_node = client->dev.of_node;  in sbs_probe()
181 	chip->regmap = devm_regmap_init_i2c(client, &sbs_regmap);  in sbs_probe()
182 	if (IS_ERR(chip->regmap))  in sbs_probe()
183 		return PTR_ERR(chip->regmap);  in sbs_probe()
187 	 * to the battery.  in sbs_probe()
189 	ret = regmap_read(chip->regmap, SBS_CHARGER_REG_STATUS, &val);  in sbs_probe()
191 		return dev_err_probe(&client->dev, ret, "Failed to get device status\n");  in sbs_probe()
192 	chip->last_state = val;  in sbs_probe()
194 	chip->power_supply = devm_power_supply_register(&client->dev, &sbs_desc, &psy_cfg);  in sbs_probe()
195 	if (IS_ERR(chip->power_supply))  in sbs_probe()
196 		return dev_err_probe(&client->dev, PTR_ERR(chip->power_supply),  in sbs_probe()
200 	 * The sbs-charger spec doesn't impose the use of an interrupt. So in  in sbs_probe()
204 	if (client->irq) {  in sbs_probe()
205 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in sbs_probe()
208 					dev_name(&client->dev), chip);  in sbs_probe()
210 			return dev_err_probe(&client->dev, ret, "Failed to request irq\n");  in sbs_probe()
212 		ret = devm_delayed_work_autocancel(&client->dev, &chip->work,  in sbs_probe()
215 			return dev_err_probe(&client->dev, ret,  in sbs_probe()
218 		schedule_delayed_work(&chip->work,  in sbs_probe()
222 	dev_info(&client->dev,  in sbs_probe()
223 		 "%s: smart charger device registered\n", client->name);  in sbs_probe()
230 	{ .compatible = "sbs,sbs-charger" },
237 	{ "sbs-charger" },
246 		.name	= "sbs-charger",
253 MODULE_DESCRIPTION("SBS smart charger driver");