diff options
Diffstat (limited to 'target/linux/ar7-2.6/files/arch/mips/ar7/gpio.c')
| -rw-r--r-- | target/linux/ar7-2.6/files/arch/mips/ar7/gpio.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/target/linux/ar7-2.6/files/arch/mips/ar7/gpio.c b/target/linux/ar7-2.6/files/arch/mips/ar7/gpio.c new file mode 100644 index 0000000000..8b3d3a958a --- /dev/null +++ b/target/linux/ar7-2.6/files/arch/mips/ar7/gpio.c @@ -0,0 +1,56 @@ +/* + * $Id$ + * + * 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); |