1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* -------------------------------------------------------------------- */
3/* i2c-pcf8584.h: PCF 8584 global defines */
4/* -------------------------------------------------------------------- */
5/* Copyright (C) 1996 Simon G. Vogl
6 1999 Hans Berglund
7
8 */
9/* -------------------------------------------------------------------- */
10
11/* With some changes from Frodo Looijaard <frodol@dds.nl> */
12
13#ifndef I2C_PCF8584_H
14#define I2C_PCF8584_H 1
15
16/* ----- Control register bits ---------------------------------------- */
17#define I2C_PCF_PIN 0x80
18#define I2C_PCF_ESO 0x40
19#define I2C_PCF_ES1 0x20
20#define I2C_PCF_ES2 0x10
21#define I2C_PCF_ENI 0x08
22#define I2C_PCF_STA 0x04
23#define I2C_PCF_STO 0x02
24#define I2C_PCF_ACK 0x01
25
26#define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
27#define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
28#define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
29#define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK)
30
31/* ----- Status register bits ----------------------------------------- */
32/*#define I2C_PCF_PIN 0x80 as above*/
33
34#define I2C_PCF_INI 0x40 /* 1 if not initialized */
35#define I2C_PCF_STS 0x20
36#define I2C_PCF_BER 0x10
37#define I2C_PCF_AD0 0x08
38#define I2C_PCF_LRB 0x08
39#define I2C_PCF_AAS 0x04
40#define I2C_PCF_LAB 0x02
41#define I2C_PCF_BB 0x01
42
43/* ----- Chip clock frequencies --------------------------------------- */
44#define I2C_PCF_CLK3 0x00
45#define I2C_PCF_CLK443 0x10
46#define I2C_PCF_CLK6 0x14
47#define I2C_PCF_CLK 0x18
48#define I2C_PCF_CLK12 0x1c
49
50/* ----- transmission frequencies ------------------------------------- */
51#define I2C_PCF_TRNS90 0x00 /* 90 kHz */
52#define I2C_PCF_TRNS45 0x01 /* 45 kHz */
53#define I2C_PCF_TRNS11 0x02 /* 11 kHz */
54#define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */
55
56
57/* ----- Access to internal registers according to ES1,ES2 ------------ */
58/* they are mapped to the data port ( a0 = 0 ) */
59/* available when ESO == 0 : */
60
61#define I2C_PCF_OWNADR 0
62#define I2C_PCF_INTREG I2C_PCF_ES2
63#define I2C_PCF_CLKREG I2C_PCF_ES1
64
65#endif /* I2C_PCF8584_H */
66

source code of linux/drivers/i2c/algos/i2c-algo-pcf.h