projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4cf8e53b MV |
1 | /* |
| 2 | * Philips UCB1400 GPIO driver | |
| 3 | * | |
| 4 | * Author: Marek Vasut <[email protected]> | |
| 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; | |
| 9af4f0ab | 18 | gpio = gpiochip_get_data(gc); |
| 4cf8e53b MV |
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; | |
| 9af4f0ab | 26 | gpio = gpiochip_get_data(gc); |
| 4cf8e53b MV |
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; | |
| 9af4f0ab LW |
35 | |
| 36 | gpio = gpiochip_get_data(gc); | |
| c9d4ab03 | 37 | return !!ucb1400_gpio_get_value(gpio->ac97, off); |
| 4cf8e53b MV |
38 | } |
| 39 | ||
| 40 | static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val) | |
| 41 | { | |
| 42 | struct ucb1400_gpio *gpio; | |
| 9af4f0ab | 43 | gpio = gpiochip_get_data(gc); |
| 4cf8e53b MV |
44 | ucb1400_gpio_set_value(gpio->ac97, off, val); |
| 45 | } | |
| 46 | ||
| 47 | static int ucb1400_gpio_probe(struct platform_device *dev) | |
| 48 | { | |
| e56aee18 | 49 | struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev); |
| 4cf8e53b MV |
50 | int err = 0; |
| 51 | ||
| 360e64d8 | 52 | if (!(ucb && ucb->gpio_offset)) { |
| 4cf8e53b MV |
53 | err = -EINVAL; |
| 54 | goto err; | |
| 55 | } | |
| 56 | ||
| 57 | platform_set_drvdata(dev, ucb); | |
| 58 | ||
| 59 | ucb->gc.label = "ucb1400_gpio"; | |
| 360e64d8 | 60 | ucb->gc.base = ucb->gpio_offset; |
| 4cf8e53b MV |
61 | ucb->gc.ngpio = 10; |
| 62 | ucb->gc.owner = THIS_MODULE; | |
| 63 | ||
| 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; | |
| 9fb1f39e | 68 | ucb->gc.can_sleep = true; |
| 4cf8e53b | 69 | |
| 5d61a9e0 | 70 | err = devm_gpiochip_add_data(&dev->dev, &ucb->gc, ucb); |
| 4cf8e53b MV |
71 | if (err) |
| 72 | goto err; | |
| 73 | ||
| 31a3f9da | 74 | if (ucb->gpio_setup) |
| 360e64d8 | 75 | err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio); |
| 4cf8e53b MV |
76 | |
| 77 | err: | |
| 78 | return err; | |
| 79 | ||
| 80 | } | |
| 81 | ||
| 82 | static int ucb1400_gpio_remove(struct platform_device *dev) | |
| 83 | { | |
| 84 | int err = 0; | |
| 85 | struct ucb1400_gpio *ucb = platform_get_drvdata(dev); | |
| 86 | ||
| 360e64d8 MV |
87 | if (ucb && ucb->gpio_teardown) { |
| 88 | err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio); | |
| 4cf8e53b MV |
89 | if (err) |
| 90 | return err; | |
| 91 | } | |
| 92 | ||
| 4cf8e53b MV |
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"); | |
| 41ad730e | 108 | MODULE_ALIAS("platform:ucb1400_gpio"); |