blob: 81c229a0fbca220a275407894b751c8c6dc9ecbf [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 i2c-dev.h - i2c-bus driver, char device interface
3
4 Copyright (C) 1995-97 Simon G. Vogl
5 Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20*/
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#ifndef _LINUX_I2C_DEV_H
23#define _LINUX_I2C_DEV_H
24
25#include <linux/types.h>
GOTO Masanori3607d1d2005-06-28 20:45:04 -070026#include <linux/compiler.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28/* Some IOCTL commands are defined in <linux/i2c.h> */
29/* Note: 10-bit addresses are NOT supported! */
30
31/* This is the structure as used in the I2C_SMBUS ioctl call */
32struct i2c_smbus_ioctl_data {
33 __u8 read_write;
34 __u8 command;
35 __u32 size;
36 union i2c_smbus_data __user *data;
37};
38
39/* This is the structure as used in the I2C_RDWR ioctl call */
40struct i2c_rdwr_ioctl_data {
41 struct i2c_msg __user *msgs; /* pointers to i2c_msgs */
42 __u32 nmsgs; /* number of i2c_msgs */
43};
44
45#define I2C_RDRW_IOCTL_MAX_MSGS 42
46
47#endif /* _LINUX_I2C_DEV_H */