include/linux/i2c-algo-pcf.h

   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 */