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 */ 47