/include/linux/i2c-mux.h

 1/*
 2 *
 3 * i2c-mux.h - functions for the i2c-bus mux support
 4 *
 5 * Copyright (c) 2008-2009 Rodolfo Giometti <giometti@linux.it>
 6 * Copyright (c) 2008-2009 Eurotech S.p.A. <info@eurotech.it>
 7 * Michael Lawnick <michael.lawnick.ext@nsn.com>
 8 *
 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#ifndef _LINUX_I2C_MUX_H
25#define _LINUX_I2C_MUX_H
26
27#ifdef __KERNEL__
28
29/*
30 * Called to create a i2c bus on a multiplexed bus segment.
31 * The mux_dev and chan_id parameters are passed to the select
32 * and deselect callback functions to perform hardware-specific
33 * mux control.
34 */
35struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
36				void *mux_dev, u32 force_nr, u32 chan_id,
37				int (*select) (struct i2c_adapter *,
38					       void *mux_dev, u32 chan_id),
39				int (*deselect) (struct i2c_adapter *,
40						 void *mux_dev, u32 chan_id));
41
42int i2c_del_mux_adapter(struct i2c_adapter *adap);
43
44#endif /* __KERNEL__ */
45
46#endif /* _LINUX_I2C_MUX_H */