diff options
Diffstat (limited to 'include/linux/altera_hwmutex.h')
| -rw-r--r-- | include/linux/altera_hwmutex.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/linux/altera_hwmutex.h b/include/linux/altera_hwmutex.h new file mode 100644 index 000000000000..166502b379f6 --- /dev/null +++ b/include/linux/altera_hwmutex.h @@ -0,0 +1,41 @@ +/* + * Copyright Altera Corporation (C) 2013. All rights reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>. + */ +#ifndef _ALTERA_MUTEX_H +#define _ALTERA_MUTEX_H + +#include <linux/device.h> +#include <linux/platform_device.h> + +struct altera_mutex { + struct list_head list; + struct platform_device *pdev; + struct mutex lock; + void __iomem *regs; + bool requested; +}; + +extern struct altera_mutex *altera_mutex_request(struct device_node *mutex_np); +extern int altera_mutex_free(struct altera_mutex *mutex); + +extern int altera_mutex_lock(struct altera_mutex *mutex, u16 owner, u16 value); + +extern int altera_mutex_trylock(struct altera_mutex *mutex, u16 owner, + u16 value); +extern int altera_mutex_unlock(struct altera_mutex *mutex, u16 owner); +extern int altera_mutex_owned(struct altera_mutex *mutex, u16 owner); +extern int altera_mutex_is_locked(struct altera_mutex *mutex); + +#endif /* _ALTERA_MUTEX_H */ |