1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* Philips UCB1400 GPIO driver
*
* Author: Marek Vasut <marek.vasut@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/module.h>
#include <linux/ucb1400.h>
struct ucb1400_gpio_data *ucbdata;
static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
{
struct ucb1400_gpio *gpio;
gpio = container_of(gc, struct ucb1400_gpio, gc);
ucb1400_gpio_set_direction(gpio->ac97, off, 0);
return 0;
}
static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
{
struct ucb1400_gpio *gpio;
gpio = container_of(gc, struct ucb1400_gpio, gc);
ucb1400_gpio_set_direction(gpio->ac97, off, 1);
ucb1400_gpio_set_value(gpio->ac97, off, val);
return 0;
}
static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
{
struct ucb1400_gpio *gpio;
gpio = container_of(gc, struct ucb1400_gpio, gc);
return ucb1400_gpio_get_value(gpio->ac97, off);
}
static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
{
struct ucb1400_gpio *gpio;
gpio = container_of(gc, struct ucb1400_gpio, gc);
ucb1400_gpio_set_value(gpio->ac97, off, val);
}
static int ucb1400_gpio_probe(struct platform_device *dev)
{
struct ucb1400_gpio *ucb = dev->dev.platform_data;
int err = 0;
if (!(ucbdata && ucbdata->gpio_offset)) {
err = -EINVAL;
goto err;
}
platform_set_drvdata(dev, ucb);
ucb->gc.label = "ucb1400_gpio";
ucb->gc.base = ucbdata->gpio_offset;
ucb->gc.ngpio = 10;
ucb->gc.owner = THIS_MODULE;
ucb->gc.direction_input = ucb1400_gpio_dir_in;
ucb->gc.direction_output = ucb1400_gpio_dir_out;
ucb->gc.get = ucb1400_gpio_get;
ucb->gc.set = ucb1400_gpio_set;
ucb->gc.can_sleep = 1;
err = gpiochip_add(&ucb->gc);
if (err)
goto err;
if (ucbdata && ucbdata->gpio_setup)
err = ucbdata->gpio_setup(&dev->dev, ucb->gc.ngpio);
err:
return err;
}
static int ucb1400_gpio_remove(struct platform_device *dev)
{
int err = 0;
struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
if (ucbdata && ucbdata->gpio_teardown) {
err = ucbdata->gpio_teardown(&dev->dev, ucb->gc.ngpio);
if (err)
return err;
}
err = gpiochip_remove(&ucb->gc);
return err;
}
static struct platform_driver ucb1400_gpio_driver = {
.probe = ucb1400_gpio_probe,
.remove = ucb1400_gpio_remove,
.driver = {
.name = "ucb1400_gpio"
},
};
void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data)
{
ucbdata = data;
}
module_platform_driver(ucb1400_gpio_driver);
MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
MODULE_LICENSE("GPL");
|
