diff options
Diffstat (limited to 'include/linux/device.h')
| -rw-r--r-- | include/linux/device.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 96d9cb108139..078c65e02370 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -55,6 +55,34 @@ enum { struct device; + +struct bus_type { + char * name; + rwlock_t lock; + atomic_t refcount; + + list_t node; + list_t devices; + list_t drivers; + + struct driver_dir_entry dir; + struct driver_dir_entry device_dir; + struct driver_dir_entry driver_dir; +}; + + +extern int bus_register(struct bus_type * bus); + +static inline struct bus_type * get_bus(struct bus_type * bus) +{ + BUG_ON(!atomic_read(&bus->refcount)); + atomic_inc(&bus->refcount); + return bus; +} + +extern void put_bus(struct bus_type * bus); + + struct device_driver { int (*probe) (struct device * dev); int (*remove) (struct device * dev, u32 flags); @@ -66,6 +94,7 @@ struct device_driver { struct device { struct list_head g_list; /* node in depth-first order list */ struct list_head node; /* node in sibling list */ + struct list_head bus_list; /* node in bus's list */ struct list_head children; struct device * parent; @@ -78,6 +107,7 @@ struct device { atomic_t refcount; /* refcount to make sure the device * persists for the right amount of time */ + struct bus_type * bus; /* type of bus device is on */ struct driver_dir_entry dir; struct device_driver *driver; /* which driver has allocated this @@ -92,6 +122,8 @@ struct device { being off. */ unsigned char *saved_state; /* saved device state */ + + void (*release)(struct device * dev); }; static inline struct device * |