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 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 * @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0)
19 * triggered
20 * @irq: IRQ number, if the smbus_alert driver should take care of interrupt
21 * handling
22 *
23 * If irq is not specified, the smbus_alert driver doesn't take care of
24 * interrupt handling. In that case it is up to the I2C bus driver to either
25 * handle the interrupts or to poll for alerts.
26 *
27 * If irq is specified then it it crucial that alert_edge_triggered is
28 * properly set.
29 */
30 struct i2c_smbus_alert_setup {
31 int irq;
32 };
33
34 struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
35 struct i2c_smbus_alert_setup *setup);
36 int i2c_handle_smbus_alert(struct i2c_client *ara);
37
38 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF)
39 int of_i2c_setup_smbus_alert(struct i2c_adapter *adap);
40 #else
41 static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap)
42 {
43 return 0;
44 }
45 #endif
46
47 #endif /* _LINUX_I2C_SMBUS_H */