1 /*
2 * i2c-smbus.h - SMBus extensions to the I2C protocol
3 *
4 * Copyright (C) 2010 Jean Delvare <jdelvare@suse.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19 * MA 02110-1301 USA.
20 */
21
22 #ifndef _LINUX_I2C_SMBUS_H
23 #define _LINUX_I2C_SMBUS_H
24
25 #include <linux/i2c.h>
26 #include <linux/spinlock.h>
27 #include <linux/workqueue.h>
28
29
30 /**
31 * i2c_smbus_alert_setup - platform data for the smbus_alert i2c client
32 * @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0)
33 * triggered
34 * @irq: IRQ number, if the smbus_alert driver should take care of interrupt
35 * handling
36 *
37 * If irq is not specified, the smbus_alert driver doesn't take care of
38 * interrupt handling. In that case it is up to the I2C bus driver to either
39 * handle the interrupts or to poll for alerts.
40 *
41 * If irq is specified then it it crucial that alert_edge_triggered is
42 * properly set.
43 */
44 struct i2c_smbus_alert_setup {
45 int irq;
46 };
47
48 struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
49 struct i2c_smbus_alert_setup *setup);
50 int i2c_handle_smbus_alert(struct i2c_client *ara);
51
52 #if IS_ENABLED(CONFIG_I2C_SMBUS) && IS_ENABLED(CONFIG_OF)
53 int of_i2c_setup_smbus_alert(struct i2c_adapter *adap);
54 #else
of_i2c_setup_smbus_alert(struct i2c_adapter * adap)55 static inline int of_i2c_setup_smbus_alert(struct i2c_adapter *adap)
56 {
57 return 0;
58 }
59 #endif
60
61 #endif /* _LINUX_I2C_SMBUS_H */
62
