tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * include/asm-ppc/pmac_low_i2c.h
3 *
4 * Copyright (C) 2003 Ben. Herrenschmidt (benh@kernel.crashing.org)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12#ifndef __PMAC_LOW_I2C_H__
13#define __PMAC_LOW_I2C_H__
14
15/* i2c mode (based on the platform functions format) */
16enum {
17 pmac_low_i2c_mode_dumb = 1,
18 pmac_low_i2c_mode_std = 2,
19 pmac_low_i2c_mode_stdsub = 3,
20 pmac_low_i2c_mode_combined = 4,
21};
22
23/* RW bit in address */
24enum {
25 pmac_low_i2c_read = 0x01,
26 pmac_low_i2c_write = 0x00
27};
28
29/* Init, called early during boot */
30extern void pmac_init_low_i2c(void);
31
32/* Locking functions exposed to i2c-keywest */
33int pmac_low_i2c_lock(struct device_node *np);
34int pmac_low_i2c_unlock(struct device_node *np);
35
36/* Access functions for platform code */
37int pmac_low_i2c_open(struct device_node *np, int channel);
38int pmac_low_i2c_close(struct device_node *np);
39int pmac_low_i2c_setmode(struct device_node *np, int mode);
40int pmac_low_i2c_xfer(struct device_node *np, u8 addrdir, u8 subaddr, u8 *data, int len);
41
42
43#endif /* __PMAC_LOW_I2C_H__ */