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
37 static inline struct i2c_client *i2c_new_slave_host_notify_device(struct i2c_adapter *adapter)
38 {
39 return ERR_PTR(-ENOSYS);
40 }
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
49 static inline void i2c_register_spd(struct i2c_adapter *adap) { }
50 #endif
51
52 #endif /* _LINUX_I2C_SMBUS_H */
53
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