1 // SPDX-License-Identifier: GPL-2.0-only
3  * Maxim MAX14656 / AL32 USB Charger Detector driver
8  * Components from Maxim AL32 Charger detection Driver for MX50 Yoshi Board
21 #include <linux/devm-helpers.h>
95 		dev_err(&client->dev,  in max14656_read_reg()
110 		dev_err(&client->dev,  in max14656_write_reg()
125 		dev_err(&client->dev, "failed to block read reg 0x%x: %d\n",  in max14656_read_block_reg()
142 	max14656_read_block_reg(chip->client, MAX14656_DEVICE_ID,  in max14656_irq_worker()
149 			chip->psy_desc.type = chg_type_props[chg_type].type;  in max14656_irq_worker()
151 			chip->psy_desc.type = POWER_SUPPLY_TYPE_UNKNOWN;  in max14656_irq_worker()
152 		chip->online = 1;  in max14656_irq_worker()
154 		chip->online = 0;  in max14656_irq_worker()
155 		chip->psy_desc.type = POWER_SUPPLY_TYPE_UNKNOWN;  in max14656_irq_worker()
158 	power_supply_changed(chip->detect_psy);  in max14656_irq_worker()
165 	schedule_delayed_work(&chip->irq_work, msecs_to_jiffies(100));  in max14656_irq()
174 	struct i2c_client *client = chip->client;  in max14656_hw_init()
177 		return -ENODEV;  in max14656_hw_init()
180 		dev_err(&client->dev, "wrong vendor ID %d\n",  in max14656_hw_init()
182 		return -ENODEV;  in max14656_hw_init()
188 		return -EINVAL;  in max14656_hw_init()
196 		return -EINVAL;  in max14656_hw_init()
199 		return -EINVAL;  in max14656_hw_init()
202 		return -EINVAL;  in max14656_hw_init()
204 	dev_info(&client->dev, "detected revision %d\n", rev);  in max14656_hw_init()
216 		val->intval = chip->online;  in max14656_get_property()
219 		val->strval = MAX14656_NAME;  in max14656_get_property()
222 		val->strval = MAX14656_MANUFACTURER;  in max14656_get_property()
225 		return -EINVAL;  in max14656_get_property()
239 	struct i2c_adapter *adapter = client->adapter;  in max14656_probe()
240 	struct device *dev = &client->dev;  in max14656_probe()
243 	int irq = client->irq;  in max14656_probe()
248 		return -ENODEV;  in max14656_probe()
253 		return -ENODEV;  in max14656_probe()
258 		return -ENOMEM;  in max14656_probe()
261 	chip->client = client;  in max14656_probe()
262 	chip->online = 0;  in max14656_probe()
263 	chip->psy_desc.name = MAX14656_NAME;  in max14656_probe()
264 	chip->psy_desc.type = POWER_SUPPLY_TYPE_UNKNOWN;  in max14656_probe()
265 	chip->psy_desc.properties = max14656_battery_props;  in max14656_probe()
266 	chip->psy_desc.num_properties = ARRAY_SIZE(max14656_battery_props);  in max14656_probe()
267 	chip->psy_desc.get_property = max14656_get_property;  in max14656_probe()
268 	chip->irq = irq;  in max14656_probe()
272 		return -ENODEV;  in max14656_probe()
274 	chip->detect_psy = devm_power_supply_register(dev,  in max14656_probe()
275 		       &chip->psy_desc, &psy_cfg);  in max14656_probe()
276 	if (IS_ERR(chip->detect_psy)) {  in max14656_probe()
278 		return -EINVAL;  in max14656_probe()
281 	ret = devm_delayed_work_autocancel(dev, &chip->irq_work,  in max14656_probe()
288 	ret = devm_request_irq(dev, chip->irq, max14656_irq,  in max14656_probe()
292 		dev_err(dev, "request_irq %d failed\n", chip->irq);  in max14656_probe()
293 		return -EINVAL;  in max14656_probe()
295 	enable_irq_wake(chip->irq);  in max14656_probe()
297 	schedule_delayed_work(&chip->irq_work, msecs_to_jiffies(2000));  in max14656_probe()
324 MODULE_DESCRIPTION("MAX14656 USB charger detector");