linux/include/linux/i2c-algo-pcf.h
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   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
  29struct 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
  47int i2c_pcf_add_bus(struct i2c_adapter *);
  48
  49#endif /* _LINUX_I2C_ALGO_PCF_H */
  50
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