projects / GitHub / mt8127 / android_kernel_alcatel_ttab.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 | ||
| 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 | { | |
| 48 | struct ucb1400_gpio *ucb = dev->dev.platform_data; | |
| 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"); |