Linux 4.6-rc6
[cris-mirror.git] / include / linux / i2c-algo-bit.h
blob63904ba6887ea1d1eb60881c122aa9cf182cff4f
1 /* ------------------------------------------------------------------------- */
2 /* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters */
3 /* ------------------------------------------------------------------------- */
4 /* Copyright (C) 1995-99 Simon G. Vogl
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19 MA 02110-1301 USA. */
20 /* ------------------------------------------------------------------------- */
22 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
23 Frodo Looijaard <frodol@dds.nl> */
25 #ifndef _LINUX_I2C_ALGO_BIT_H
26 #define _LINUX_I2C_ALGO_BIT_H
28 /* --- Defines for bit-adapters --------------------------------------- */
30 * This struct contains the hw-dependent functions of bit-style adapters to
31 * manipulate the line states, and to init any hw-specific features. This is
32 * only used if you have more than one hw-type of adapter running.
34 struct i2c_algo_bit_data {
35 void *data; /* private data for lowlevel routines */
36 void (*setsda) (void *data, int state);
37 void (*setscl) (void *data, int state);
38 int (*getsda) (void *data);
39 int (*getscl) (void *data);
40 int (*pre_xfer) (struct i2c_adapter *);
41 void (*post_xfer) (struct i2c_adapter *);
43 /* local settings */
44 int udelay; /* half clock cycle time in us,
45 minimum 2 us for fast-mode I2C,
46 minimum 5 us for standard-mode I2C and SMBus,
47 maximum 50 us for SMBus */
48 int timeout; /* in jiffies */
51 int i2c_bit_add_bus(struct i2c_adapter *);
52 int i2c_bit_add_numbered_bus(struct i2c_adapter *);
53 extern const struct i2c_algorithm i2c_bit_algo;
55 #endif /* _LINUX_I2C_ALGO_BIT_H */