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Linux/include/linux/i2c-mux.h

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  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., 51 Franklin Street, Fifth Floor, Boston,
 22  * MA 02110-1301 USA.
 23  */
 24 
 25 #ifndef _LINUX_I2C_MUX_H
 26 #define _LINUX_I2C_MUX_H
 27 
 28 #ifdef __KERNEL__
 29 
 30 /*
 31  * Called to create a i2c bus on a multiplexed bus segment.
 32  * The mux_dev and chan_id parameters are passed to the select
 33  * and deselect callback functions to perform hardware-specific
 34  * mux control.
 35  */
 36 struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
 37                                 struct device *mux_dev,
 38                                 void *mux_priv, u32 force_nr, u32 chan_id,
 39                                 unsigned int class,
 40                                 int (*select) (struct i2c_adapter *,
 41                                                void *mux_dev, u32 chan_id),
 42                                 int (*deselect) (struct i2c_adapter *,
 43                                                  void *mux_dev, u32 chan_id));
 44 
 45 void i2c_del_mux_adapter(struct i2c_adapter *adap);
 46 
 47 #endif /* __KERNEL__ */
 48 
 49 #endif /* _LINUX_I2C_MUX_H */
 50 

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