include/linux/i2c-algo-pcf.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /* ------------------------------------------------------------------------- */
   3 /* adap-pcf.h i2c driver algorithms for PCF8584 adapters                     */
   4 /* ------------------------------------------------------------------------- */
   5 /*   Copyright (C) 1995-97 Simon G. Vogl
   6                    1998-99 Hans Berglund
   7
   8  */
   9 /* ------------------------------------------------------------------------- */
  10
  11 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
  12    Frodo Looijaard <frodol@dds.nl> */
  13
  14 #ifndef _LINUX_I2C_ALGO_PCF_H
  15 #define _LINUX_I2C_ALGO_PCF_H
  16
  17 struct i2c_algo_pcf_data {
  18         void *data;             /* private data for lolevel routines    */
  19         void (*setpcf) (void *data, int ctl, int val);
  20         int  (*getpcf) (void *data, int ctl);
  21         int  (*getown) (void *data);
  22         int  (*getclock) (void *data);
  23         void (*waitforpin) (void *data);
  24
  25         void (*xfer_begin) (void *data);
  26         void (*xfer_end) (void *data);
  27
  28         /* Multi-master lost arbitration back-off delay (msecs)
  29          * This should be set by the bus adapter or knowledgable client
  30          * if bus is multi-mastered, else zero
  31          */
  32         unsigned long lab_mdelay;
  33 };
  34
  35 int i2c_pcf_add_bus(struct i2c_adapter *);
  36
  37 #endif /* _LINUX_I2C_ALGO_PCF_H */