]>
Commit | Line | Data |
---|---|---|
4cf8e53b MV |
1 | /* |
2 | * Philips UCB1400 GPIO driver | |
3 | * | |
4 | * Author: Marek Vasut <marek.vasut@gmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/ucb1400.h> | |
14 | ||
4cf8e53b MV |
15 | static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off) |
16 | { | |
17 | struct ucb1400_gpio *gpio; | |
18 | gpio = container_of(gc, struct ucb1400_gpio, gc); | |
19 | ucb1400_gpio_set_direction(gpio->ac97, off, 0); | |
20 | return 0; | |
21 | } | |
22 | ||
23 | static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val) | |
24 | { | |
25 | struct ucb1400_gpio *gpio; | |
26 | gpio = container_of(gc, struct ucb1400_gpio, gc); | |
27 | ucb1400_gpio_set_direction(gpio->ac97, off, 1); | |
28 | ucb1400_gpio_set_value(gpio->ac97, off, val); | |
29 | return 0; | |
30 | } | |
31 | ||
32 | static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off) | |
33 | { | |
34 | struct ucb1400_gpio *gpio; | |
35 | gpio = container_of(gc, struct ucb1400_gpio, gc); | |
36 | return ucb1400_gpio_get_value(gpio->ac97, off); | |
37 | } | |
38 | ||
39 | static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val) | |
40 | { | |
41 | struct ucb1400_gpio *gpio; | |
42 | gpio = container_of(gc, struct ucb1400_gpio, gc); | |
43 | ucb1400_gpio_set_value(gpio->ac97, off, val); | |
44 | } | |
45 | ||
46 | static int ucb1400_gpio_probe(struct platform_device *dev) | |
47 | { | |
e56aee18 | 48 | struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev); |
4cf8e53b MV |
49 | int err = 0; |
50 | ||
360e64d8 | 51 | if (!(ucb && ucb->gpio_offset)) { |
4cf8e53b MV |
52 | err = -EINVAL; |
53 | goto err; | |
54 | } | |
55 | ||
56 | platform_set_drvdata(dev, ucb); | |
57 | ||
58 | ucb->gc.label = "ucb1400_gpio"; | |
360e64d8 | 59 | ucb->gc.base = ucb->gpio_offset; |
4cf8e53b MV |
60 | ucb->gc.ngpio = 10; |
61 | ucb->gc.owner = THIS_MODULE; | |
62 | ||
63 | ucb->gc.direction_input = ucb1400_gpio_dir_in; | |
64 | ucb->gc.direction_output = ucb1400_gpio_dir_out; | |
65 | ucb->gc.get = ucb1400_gpio_get; | |
66 | ucb->gc.set = ucb1400_gpio_set; | |
67 | ucb->gc.can_sleep = 1; | |
68 | ||
69 | err = gpiochip_add(&ucb->gc); | |
70 | if (err) | |
71 | goto err; | |
72 | ||
360e64d8 MV |
73 | if (ucb && ucb->gpio_setup) |
74 | err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio); | |
4cf8e53b MV |
75 | |
76 | err: | |
77 | return err; | |
78 | ||
79 | } | |
80 | ||
81 | static int ucb1400_gpio_remove(struct platform_device *dev) | |
82 | { | |
83 | int err = 0; | |
84 | struct ucb1400_gpio *ucb = platform_get_drvdata(dev); | |
85 | ||
360e64d8 MV |
86 | if (ucb && ucb->gpio_teardown) { |
87 | err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio); | |
4cf8e53b MV |
88 | if (err) |
89 | return err; | |
90 | } | |
91 | ||
92 | err = gpiochip_remove(&ucb->gc); | |
93 | return err; | |
94 | } | |
95 | ||
96 | static struct platform_driver ucb1400_gpio_driver = { | |
97 | .probe = ucb1400_gpio_probe, | |
98 | .remove = ucb1400_gpio_remove, | |
99 | .driver = { | |
100 | .name = "ucb1400_gpio" | |
101 | }, | |
102 | }; | |
103 | ||
6f61415e | 104 | module_platform_driver(ucb1400_gpio_driver); |
4cf8e53b MV |
105 | |
106 | MODULE_DESCRIPTION("Philips UCB1400 GPIO driver"); | |
107 | MODULE_LICENSE("GPL"); |