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author | J. Bruce Fields <bfields@citi.umich.edu> | 2009-08-21 11:27:29 -0400 |
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committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-08-21 11:27:29 -0400 |
commit | e9dc122166b8d863d3057a66ada04838e5548e52 (patch) | |
tree | 749e15bf719b64bf9113db7acd8e043d9742cb26 /arch/mips/ar7/gpio.c | |
parent | 560ab42ef923aaf2e4347315bdfcc74b2708972c (diff) | |
parent | 405d8f8b1d936414da2093d4149ff790ff3f84a5 (diff) | |
download | linux-e9dc122166b8d863d3057a66ada04838e5548e52.tar.gz linux-e9dc122166b8d863d3057a66ada04838e5548e52.tar.bz2 linux-e9dc122166b8d863d3057a66ada04838e5548e52.zip |
Merge branch 'nfs-for-2.6.32' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 into for-2.6.32-incoming
Conflicts:
net/sunrpc/cache.c
Diffstat (limited to 'arch/mips/ar7/gpio.c')
-rw-r--r-- | arch/mips/ar7/gpio.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/mips/ar7/gpio.c b/arch/mips/ar7/gpio.c new file mode 100644 index 000000000000..74e14a3dbf4a --- /dev/null +++ b/arch/mips/ar7/gpio.c @@ -0,0 +1,48 @@ +/* + * 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); |