| /* |
| * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> |
| * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <linux/module.h> |
| |
| #include <asm/mach-ar7/gpio.h> |
| |
| static const char *ar7_gpio_list[AR7_GPIO_MAX]; |
| |
| int gpio_request(unsigned gpio, const char *label) |
| { |
| if (gpio >= AR7_GPIO_MAX) |
| return -EINVAL; |
| |
| if (ar7_gpio_list[gpio]) |
| return -EBUSY; |
| |
| if (label) |
| ar7_gpio_list[gpio] = label; |
| else |
| ar7_gpio_list[gpio] = "busy"; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(gpio_request); |
| |
| void gpio_free(unsigned gpio) |
| { |
| BUG_ON(!ar7_gpio_list[gpio]); |
| ar7_gpio_list[gpio] = NULL; |
| } |
| EXPORT_SYMBOL(gpio_free); |