root/i2c/trunk/kernel/i2c-frodo.c @ 3765

Revision 3765, 1.7 KB (checked in by kmalkki, 11 years ago)

(Kyösti) More cleanups

Redo i2c-core locks.

No longer pass controlling_mod in i2cproc_register_entry, use
client->driver->owner instead.

Comment out or remove obsolete parts of mkpatch for 2.5.
Currently it does not touch kernel build/configure system at all.

Cleanup #include order. Note that kernel headers are not to be
included for userland utilities, to promote binary compatibility of
utilities across kernel versions.

Remove bus_scans. Remove empty and unused algo_control and
debugging code that would not compile if uncommented.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
Line 
1
2/*
3 * linux/drivers/i2c/i2c-frodo.c
4 *
5 * Author: Abraham van der Merwe <abraham@2d3d.co.za>
6 *
7 * An I2C adapter driver for the 2d3D, Inc. StrongARM SA-1110
8 * Development board (Frodo).
9 *
10 * This source code is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * version 2 as published by the Free Software Foundation.
13 */
14
15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/delay.h>
19#include "i2c.h"
20#include "i2c-algo-bit.h"
21#include <asm/hardware.h>
22
23
24static void frodo_setsda (void *data,int state)
25{
26        if (state)
27                FRODO_CPLD_I2C |= FRODO_I2C_SDA_OUT;
28        else
29                FRODO_CPLD_I2C &= ~FRODO_I2C_SDA_OUT;
30}
31
32static void frodo_setscl (void *data,int state)
33{
34        if (state)
35                FRODO_CPLD_I2C |= FRODO_I2C_SCL_OUT;
36        else
37                FRODO_CPLD_I2C &= ~FRODO_I2C_SCL_OUT;
38}
39
40static int frodo_getsda (void *data)
41{
42        return ((FRODO_CPLD_I2C & FRODO_I2C_SDA_IN) != 0);
43}
44
45static int frodo_getscl (void *data)
46{
47        return ((FRODO_CPLD_I2C & FRODO_I2C_SCL_IN) != 0);
48}
49
50static struct i2c_algo_bit_data bit_frodo_data = {
51        .setsda         = frodo_setsda,
52        .setscl         = frodo_setscl,
53        .getsda         = frodo_getsda,
54        .getscl         = frodo_getscl,
55        .udelay         = 80,
56        .mdelay         = 80,
57        .timeout        = HZ
58};
59
60static struct i2c_adapter frodo_ops = {
61        .owner                  = THIS_MODULE,
62        .name                   = "Frodo adapter driver",
63        .id                     = I2C_HW_B_FRODO,
64        .algo_data              = &bit_frodo_data,
65};
66
67static int __init i2c_frodo_init (void)
68{
69        return i2c_bit_add_bus(&frodo_ops);
70}
71
72static void __exit i2c_frodo_exit (void)
73{
74        i2c_bit_del_bus(&frodo_ops);
75}
76
77MODULE_AUTHOR ("Abraham van der Merwe <abraham@2d3d.co.za>");
78MODULE_DESCRIPTION ("I2C-Bus adapter routines for Frodo");
79MODULE_LICENSE ("GPL");
80
81module_init (i2c_frodo_init);
82module_exit (i2c_frodo_exit);
83
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