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Jean Delvareb5527a72010-03-02 12:23:42 +01001/*
2 * i2c-smbus.h - SMBus extensions to the I2C protocol
3 *
4 * Copyright (C) 2010 Jean Delvare <khali@linux-fr.org>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#ifndef _LINUX_I2C_SMBUS_H
22#define _LINUX_I2C_SMBUS_H
23
24#include <linux/i2c.h>
25
26
27/**
28 * i2c_smbus_alert_setup - platform data for the smbus_alert i2c client
29 * @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0)
30 * triggered
31 * @irq: IRQ number, if the smbus_alert driver should take care of interrupt
32 * handling
33 *
34 * If irq is not specified, the smbus_alert driver doesn't take care of
35 * interrupt handling. In that case it is up to the I2C bus driver to either
36 * handle the interrupts or to poll for alerts.
37 *
38 * If irq is specified then it it crucial that alert_edge_triggered is
39 * properly set.
40 */
41struct i2c_smbus_alert_setup {
42 unsigned int alert_edge_triggered:1;
43 int irq;
44};
45
46struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
47 struct i2c_smbus_alert_setup *setup);
48int i2c_handle_smbus_alert(struct i2c_client *ara);
49
50#endif /* _LINUX_I2C_SMBUS_H */