49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
|
|
* 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);
|