projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 7ca5dc14 FF |
1 | /* |
| 2 | * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> | |
| 3 | * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License as published by | |
| 7 | * the Free Software Foundation; either version 2 of the License, or | |
| 8 | * (at your option) any later version. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program; if not, write to the Free Software | |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 18 | */ | |
| 19 | ||
| 20 | #include <linux/module.h> | |
| 21 | ||
| 22 | #include <asm/mach-ar7/gpio.h> | |
| 23 | ||
| 24 | static const char *ar7_gpio_list[AR7_GPIO_MAX]; | |
| 25 | ||
| 26 | int gpio_request(unsigned gpio, const char *label) | |
| 27 | { | |
| 28 | if (gpio >= AR7_GPIO_MAX) | |
| 29 | return -EINVAL; | |
| 30 | ||
| 31 | if (ar7_gpio_list[gpio]) | |
| 32 | return -EBUSY; | |
| 33 | ||
| 34 | if (label) | |
| 35 | ar7_gpio_list[gpio] = label; | |
| 36 | else | |
| 37 | ar7_gpio_list[gpio] = "busy"; | |
| 38 | ||
| 39 | return 0; | |
| 40 | } | |
| 41 | EXPORT_SYMBOL(gpio_request); | |
| 42 | ||
| 43 | void gpio_free(unsigned gpio) | |
| 44 | { | |
| 45 | BUG_ON(!ar7_gpio_list[gpio]); | |
| 46 | ar7_gpio_list[gpio] = NULL; | |
| 47 | } | |
| 48 | EXPORT_SYMBOL(gpio_free); |