1 /* ------------------------------------------------------------------------- */ 2 /* adap-pcf.h i2c driver algorithms for PCF8584 adapters */ 3 /* ------------------------------------------------------------------------- */ 4 /* Copyright (C) 1995-97 Simon G. Vogl 5 1998-99 Hans Berglund 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., 51 Franklin Street, Fifth Floor, Boston, 20 MA 02110-1301 USA. */ 21 /* ------------------------------------------------------------------------- */ 22 23 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even 24 Frodo Looijaard <frodol@dds.nl> */ 25 26 #ifndef _LINUX_I2C_ALGO_PCF_H 27 #define _LINUX_I2C_ALGO_PCF_H 28 29 struct i2c_algo_pcf_data { 30 void *data; /* private data for lolevel routines */ 31 void (*setpcf) (void *data, int ctl, int val); 32 int (*getpcf) (void *data, int ctl); 33 int (*getown) (void *data); 34 int (*getclock) (void *data); 35 void (*waitforpin) (void *data); 36 37 void (*xfer_begin) (void *data); 38 void (*xfer_end) (void *data); 39 40 /* Multi-master lost arbitration back-off delay (msecs) 41 * This should be set by the bus adapter or knowledgable client 42 * if bus is multi-mastered, else zero 43 */ 44 unsigned long lab_mdelay; 45 }; 46 47 int i2c_pcf_add_bus(struct i2c_adapter *); 48 49 #endif /* _LINUX_I2C_ALGO_PCF_H */ 50