1
0
mirror of git://projects.qi-hardware.com/openwrt-xburst.git synced 2024-12-05 05:49:42 +02:00
openwrt-xburst/target/linux/ar7-2.6/files/arch/mips/ar7/gpio.c
ejka 8c72b797b4 Add ar7-2.6 port (marked as broken for now).
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6600 3c298f89-4303-0410-b956-a3cf2f4a3e73
2007-03-18 09:40:51 +00:00

57 lines
1.4 KiB
C

/*
* $Id$
*
* Copyright (C) 2007 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/init.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <asm/addrspace.h>
#include <asm/io.h>
#include <asm/ar7/ar7.h>
#include <asm/ar7/gpio.h>
static char *ar7_gpio_list[AR7_GPIO_MAX] = { 0, };
int gpio_request(unsigned gpio, 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);