2  * i2c-smbus.c - SMBus extensions to the I2C protocol
5  * Copyright (C) 2010 Jean Delvare <jdelvare@suse.de>
20 #include <linux/i2c-smbus.h>
46 	if (!client || client->addr != data->addr)  in smbus_do_alert()
48 	if (client->flags & I2C_CLIENT_TEN)  in smbus_do_alert()
56 	if (client->dev.driver) {  in smbus_do_alert()
57 		driver = to_i2c_driver(client->dev.driver);  in smbus_do_alert()
58 		if (driver->alert)  in smbus_do_alert()
59 			driver->alert(client, data->type, data->data);  in smbus_do_alert()
61 			dev_warn(&client->dev, "no driver alert()!\n");  in smbus_do_alert()
63 		dev_dbg(&client->dev, "alert with no driver\n");  in smbus_do_alert()
67 	return -EBUSY;  in smbus_do_alert()
80 	ara = alert->ara;  in smbus_alert()
89 		 * responding, an SMBus device stops asserting SMBALERT#.  in smbus_alert()
91 		 * Note that SMBus 2.0 reserves 10-bit addresses for future  in smbus_alert()
103 			dev_warn(&ara->dev, "Duplicate SMBALERT# from dev "  in smbus_alert()
107 		dev_dbg(&ara->dev, "SMBALERT# from dev 0x%02x, flag %d\n",  in smbus_alert()
111 		device_for_each_child(&ara->adapter->dev, &data,  in smbus_alert()
133 	struct i2c_smbus_alert_setup *setup = dev_get_platdata(&ara->dev);  in smbalert_probe()
135 	struct i2c_adapter *adapter = ara->adapter;  in smbalert_probe()
138 	alert = devm_kzalloc(&ara->dev, sizeof(struct i2c_smbus_alert),  in smbalert_probe()
141 		return -ENOMEM;  in smbalert_probe()
144 		irq = setup->irq;  in smbalert_probe()
146 		irq = of_irq_get_byname(adapter->dev.of_node, "smbus_alert");  in smbalert_probe()
151 	INIT_WORK(&alert->alert, smbalert_work);  in smbalert_probe()
152 	alert->ara = ara;  in smbalert_probe()
155 		res = devm_request_threaded_irq(&ara->dev, irq,  in smbalert_probe()
164 	dev_info(&adapter->dev, "supports SMBALERT#\n");  in smbalert_probe()
174 	cancel_work_sync(&alert->alert);  in smbalert_remove()
194  * i2c_handle_smbus_alert - Handle an SMBus alert
209 	return schedule_work(&alert->alert);  in i2c_handle_smbus_alert()
215 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");