include/linux/i2c-algo-pcf.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /* ------------------------------------------------------------------------- */
0003 /* adap-pcf.h i2c driver algorithms for PCF8584 adapters                     */
0004 /* ------------------------------------------------------------------------- */
0005 /*   Copyright (C) 1995-97 Simon G. Vogl
0006                    1998-99 Hans Berglund
0007
0008  */
0009 /* ------------------------------------------------------------------------- */
0010
0011 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
0012    Frodo Looijaard <frodol@dds.nl> */
0013
0014 #ifndef _LINUX_I2C_ALGO_PCF_H
0015 #define _LINUX_I2C_ALGO_PCF_H
0016
0017 struct i2c_algo_pcf_data {
0018     void *data;     /* private data for lolevel routines    */
0019     void (*setpcf) (void *data, int ctl, int val);
0020     int  (*getpcf) (void *data, int ctl);
0021     int  (*getown) (void *data);
0022     int  (*getclock) (void *data);
0023     void (*waitforpin) (void *data);
0024
0025     void (*xfer_begin) (void *data);
0026     void (*xfer_end) (void *data);
0027
0028     /* Multi-master lost arbitration back-off delay (msecs)
0029      * This should be set by the bus adapter or knowledgable client
0030      * if bus is multi-mastered, else zero
0031      */
0032     unsigned long lab_mdelay;
0033 };
0034
0035 int i2c_pcf_add_bus(struct i2c_adapter *);
0036
0037 #endif /* _LINUX_I2C_ALGO_PCF_H */