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_OF)
34 int of_i2c_setup_smbus_alert(struct i2c_adapter *adap);
35 #else
of_i2c_setup_smbus_alert(struct i2c_adapter * adap)36 static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap)
37 {
38 	return 0;
39 }
40 #endif
41 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_I2C_SLAVE)
42 struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter);
43 void i2c_free_slave_host_notify_device(struct i2c_client *client);
44 #else
i2c_new_slave_host_notify_device(struct i2c_adapter * adapter)45 static inline struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter)
46 {
47 	return ERR_PTR(-ENOSYS);
48 }
i2c_free_slave_host_notify_device(struct i2c_client * client)49 static inline void i2c_free_slave_host_notify_device(struct i2c_client *client)
50 {
51 }
52 #endif
53 
54 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_DMI)
55 void i2c_register_spd(struct i2c_adapter *adap);
56 #else
i2c_register_spd(struct i2c_adapter * adap)57 static inline void i2c_register_spd(struct i2c_adapter *adap) { }
58 #endif
59 
60 #endif /* _LINUX_I2C_SMBUS_H */
61