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 */