git://bbs.cooldavid.org / net-next-2.6.git / blame
| 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 | ||
| 15 | struct ucb1400_gpio_data *ucbdata; | |
| 16 | ||
| 17 | static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off) | |
| 18 | { | |
| 19 | struct ucb1400_gpio *gpio; | |
| 20 | gpio = container_of(gc, struct ucb1400_gpio, gc); | |
| 21 | ucb1400_gpio_set_direction(gpio->ac97, off, 0); | |
| 22 | return 0; | |
| 23 | } | |
| 24 | ||
| 25 | static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val) | |
| 26 | { | |
| 27 | struct ucb1400_gpio *gpio; | |
| 28 | gpio = container_of(gc, struct ucb1400_gpio, gc); | |
| 29 | ucb1400_gpio_set_direction(gpio->ac97, off, 1); | |
| 30 | ucb1400_gpio_set_value(gpio->ac97, off, val); | |
| 31 | return 0; | |
| 32 | } | |
| 33 | ||
| 34 | static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off) | |
| 35 | { | |
| 36 | struct ucb1400_gpio *gpio; | |
| 37 | gpio = container_of(gc, struct ucb1400_gpio, gc); | |
| 38 | return ucb1400_gpio_get_value(gpio->ac97, off); | |
| 39 | } | |
| 40 | ||
| 41 | static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val) | |
| 42 | { | |
| 43 | struct ucb1400_gpio *gpio; | |
| 44 | gpio = container_of(gc, struct ucb1400_gpio, gc); | |
| 45 | ucb1400_gpio_set_value(gpio->ac97, off, val); | |
| 46 | } | |
| 47 | ||
| 48 | static int ucb1400_gpio_probe(struct platform_device *dev) | |
| 49 | { | |
| 50 | struct ucb1400_gpio *ucb = dev->dev.platform_data; | |
| 51 | int err = 0; | |
| 52 | ||
| 53 | if (!(ucbdata && ucbdata->gpio_offset)) { | |
| 54 | err = -EINVAL; | |
| 55 | goto err; | |
| 56 | } | |
| 57 | ||
| 58 | platform_set_drvdata(dev, ucb); | |
| 59 | ||
| 60 | ucb->gc.label = "ucb1400_gpio"; | |
| 61 | ucb->gc.base = ucbdata->gpio_offset; | |
| 62 | ucb->gc.ngpio = 10; | |
| 63 | ucb->gc.owner = THIS_MODULE; | |
| 64 | ||
| 65 | ucb->gc.direction_input = ucb1400_gpio_dir_in; | |
| 66 | ucb->gc.direction_output = ucb1400_gpio_dir_out; | |
| 67 | ucb->gc.get = ucb1400_gpio_get; | |
| 68 | ucb->gc.set = ucb1400_gpio_set; | |
| 69 | ucb->gc.can_sleep = 1; | |
| 70 | ||
| 71 | err = gpiochip_add(&ucb->gc); | |
| 72 | if (err) | |
| 73 | goto err; | |
| 74 | ||
| 75 | if (ucbdata && ucbdata->gpio_setup) | |
| 76 | err = ucbdata->gpio_setup(&dev->dev, ucb->gc.ngpio); | |
| 77 | ||
| 78 | err: | |
| 79 | return err; | |
| 80 | ||
| 81 | } | |
| 82 | ||
| 83 | static int ucb1400_gpio_remove(struct platform_device *dev) | |
| 84 | { | |
| 85 | int err = 0; | |
| 86 | struct ucb1400_gpio *ucb = platform_get_drvdata(dev); | |
| 87 | ||
| 88 | if (ucbdata && ucbdata->gpio_teardown) { | |
| 89 | err = ucbdata->gpio_teardown(&dev->dev, ucb->gc.ngpio); | |
| 90 | if (err) | |
| 91 | return err; | |
| 92 | } | |
| 93 | ||
| 94 | err = gpiochip_remove(&ucb->gc); | |
| 95 | return err; | |
| 96 | } | |
| 97 | ||
| 98 | static struct platform_driver ucb1400_gpio_driver = { | |
| 99 | .probe = ucb1400_gpio_probe, | |
| 100 | .remove = ucb1400_gpio_remove, | |
| 101 | .driver = { | |
| 102 | .name = "ucb1400_gpio" | |
| 103 | }, | |
| 104 | }; | |
| 105 | ||
| 106 | static int __init ucb1400_gpio_init(void) | |
| 107 | { | |
| 108 | return platform_driver_register(&ucb1400_gpio_driver); | |
| 109 | } | |
| 110 | ||
| 111 | static void __exit ucb1400_gpio_exit(void) | |
| 112 | { | |
| 113 | platform_driver_unregister(&ucb1400_gpio_driver); | |
| 114 | } | |
| 115 | ||
| 116 | void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data) | |
| 117 | { | |
| 118 | ucbdata = data; | |
| 119 | } | |
| 120 | ||
| 121 | module_init(ucb1400_gpio_init); | |
| 122 | module_exit(ucb1400_gpio_exit); | |
| 123 | ||
| 124 | MODULE_DESCRIPTION("Philips UCB1400 GPIO driver"); | |
| 125 | MODULE_LICENSE("GPL"); |