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  */
  35 struct 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
  42 int i2c_del_mux_adapter(struct i2c_adapter *adap);
  43
  44 #endif /* __KERNEL__ */
  45
  46 #endif /* _LINUX_I2C_MUX_H */