sysdev.h
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上传日期:2009-04-28
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文件大小:3k
- /**
- * System devices follow a slightly different driver model.
- * They don't need to do dynammic driver binding, can't be probed,
- * and don't reside on any type of peripheral bus.
- * So, we represent and treat them a little differently.
- *
- * We still have a notion of a driver for a system device, because we still
- * want to perform basic operations on these devices.
- *
- * We also support auxillary drivers binding to devices of a certain class.
- *
- * This allows configurable drivers to register themselves for devices of
- * a certain type. And, it allows class definitions to reside in generic
- * code while arch-specific code can register specific drivers.
- *
- * Auxillary drivers registered with a NULL cls are registered as drivers
- * for all system devices, and get notification calls for each device.
- */
- #ifndef _SYSDEV_H_
- #define _SYSDEV_H_
- #include <linux/kobject.h>
- #include <linux/pm.h>
- struct sys_device;
- struct sysdev_class {
- struct list_head drivers;
- /* Default operations for these types of devices */
- int (*shutdown)(struct sys_device *);
- int (*suspend)(struct sys_device *, pm_message_t state);
- int (*resume)(struct sys_device *);
- struct kset kset;
- };
- extern int sysdev_class_register(struct sysdev_class *);
- extern void sysdev_class_unregister(struct sysdev_class *);
- /**
- * Auxillary system device drivers.
- */
- struct sysdev_driver {
- struct list_head entry;
- int (*add)(struct sys_device *);
- int (*remove)(struct sys_device *);
- int (*shutdown)(struct sys_device *);
- int (*suspend)(struct sys_device *, pm_message_t state);
- int (*resume)(struct sys_device *);
- };
- extern int sysdev_driver_register(struct sysdev_class *, struct sysdev_driver *);
- extern void sysdev_driver_unregister(struct sysdev_class *, struct sysdev_driver *);
- /**
- * sys_devices can be simplified a lot from regular devices, because they're
- * simply not as versatile.
- */
- struct sys_device {
- u32 id;
- struct sysdev_class * cls;
- struct kobject kobj;
- };
- extern int sysdev_register(struct sys_device *);
- extern void sysdev_unregister(struct sys_device *);
- struct sysdev_attribute {
- struct attribute attr;
- ssize_t (*show)(struct sys_device *, char *);
- ssize_t (*store)(struct sys_device *, const char *, size_t);
- };
- #define SYSDEV_ATTR(_name,_mode,_show,_store)
- struct sysdev_attribute attr_##_name = {
- .attr = {.name = __stringify(_name), .mode = _mode },
- .show = _show,
- .store = _store,
- };
- extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *);
- extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *);
- #endif /* _SYSDEV_H_ */