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 */
38