Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / gpio / gpio-ucb1400.c
blob5dbe31bf66991891e4c7f3dbf37afd961c6d3da8
1 /*
2 * Philips UCB1400 GPIO driver
4 * Author: Marek Vasut <marek.vasut@gmail.com>
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.
12 #include <linux/module.h>
13 #include <linux/ucb1400.h>
15 static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
17 struct ucb1400_gpio *gpio;
18 gpio = gpiochip_get_data(gc);
19 ucb1400_gpio_set_direction(gpio->ac97, off, 0);
20 return 0;
23 static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
25 struct ucb1400_gpio *gpio;
26 gpio = gpiochip_get_data(gc);
27 ucb1400_gpio_set_direction(gpio->ac97, off, 1);
28 ucb1400_gpio_set_value(gpio->ac97, off, val);
29 return 0;
32 static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
34 struct ucb1400_gpio *gpio;
36 gpio = gpiochip_get_data(gc);
37 return !!ucb1400_gpio_get_value(gpio->ac97, off);
40 static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
42 struct ucb1400_gpio *gpio;
43 gpio = gpiochip_get_data(gc);
44 ucb1400_gpio_set_value(gpio->ac97, off, val);
47 static int ucb1400_gpio_probe(struct platform_device *dev)
49 struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev);
50 int err = 0;
52 if (!(ucb && ucb->gpio_offset)) {
53 err = -EINVAL;
54 goto err;
57 platform_set_drvdata(dev, ucb);
59 ucb->gc.label = "ucb1400_gpio";
60 ucb->gc.base = ucb->gpio_offset;
61 ucb->gc.ngpio = 10;
62 ucb->gc.owner = THIS_MODULE;
64 ucb->gc.direction_input = ucb1400_gpio_dir_in;
65 ucb->gc.direction_output = ucb1400_gpio_dir_out;
66 ucb->gc.get = ucb1400_gpio_get;
67 ucb->gc.set = ucb1400_gpio_set;
68 ucb->gc.can_sleep = true;
70 err = devm_gpiochip_add_data(&dev->dev, &ucb->gc, ucb);
71 if (err)
72 goto err;
74 if (ucb->gpio_setup)
75 err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
77 err:
78 return err;
82 static int ucb1400_gpio_remove(struct platform_device *dev)
84 int err = 0;
85 struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
87 if (ucb && ucb->gpio_teardown) {
88 err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio);
89 if (err)
90 return err;
93 return err;
96 static struct platform_driver ucb1400_gpio_driver = {
97 .probe = ucb1400_gpio_probe,
98 .remove = ucb1400_gpio_remove,
99 .driver = {
100 .name = "ucb1400_gpio"
104 module_platform_driver(ucb1400_gpio_driver);
106 MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
107 MODULE_LICENSE("GPL");
108 MODULE_ALIAS("platform:ucb1400_gpio");