1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * i2c-smbus.h - SMBus extensions to the I2C protocol
4  *
5  * Copyright (C) 2010-2019 Jean Delvare <jdelvare@suse.de>
6  */
7 
8 #ifndef _LINUX_I2C_SMBUS_H
9 #define _LINUX_I2C_SMBUS_H
10 
11 #include <linux/i2c.h>
12 #include <linux/spinlock.h>
13 #include <linux/workqueue.h>
14 
15 
16 /**
17  * i2c_smbus_alert_setup - platform data for the smbus_alert i2c client
18  * @irq: IRQ number, if the smbus_alert driver should take care of interrupt
19  *		handling
20  *
21  * If irq is not specified, the smbus_alert driver doesn't take care of
22  * interrupt handling. In that case it is up to the I2C bus driver to either
23  * handle the interrupts or to poll for alerts.
24  */
25 struct i2c_smbus_alert_setup {
26 	int			irq;
27 };
28 
29 struct i2c_client *i2c_new_smbus_alert_device(struct i2c_adapter *adapter,
30 					      struct i2c_smbus_alert_setup *setup);
31 int i2c_handle_smbus_alert(struct i2c_client *ara);
32 
33 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_I2C_SLAVE)
34 struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter);
35 void i2c_free_slave_host_notify_device(struct i2c_client *client);
36 #else
i2c_new_slave_host_notify_device(struct i2c_adapter * adapter)37 static inline struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter)
38 {
39 	return ERR_PTR(-ENOSYS);
40 }
i2c_free_slave_host_notify_device(struct i2c_client * client)41 static inline void i2c_free_slave_host_notify_device(struct i2c_client *client)
42 {
43 }
44 #endif
45 
46 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_DMI)
47 void i2c_register_spd(struct i2c_adapter *adap);
48 #else
i2c_register_spd(struct i2c_adapter * adap)49 static inline void i2c_register_spd(struct i2c_adapter *adap) { }
50 #endif
51 
52 #endif /* _LINUX_I2C_SMBUS_H */
53